Merging upstream version 127.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

779 files changed, 3961 insertions, 4268 deletions

diff --git a/js/src/tests/test262/built-ins/Object/assign/assign-descriptor.js b/js/src/tests/test262/built-ins/Object/assign/assign-descriptor.js
index 5ee1c8216e..29f23b7b63 100644
--- a/js/src/tests/test262/built-ins/Object/assign/assign-descriptor.js
+++ b/js/src/tests/test262/built-ins/Object/assign/assign-descriptor.js
@@ -7,8 +7,10 @@ includes: [propertyHelper.js]
 es6id: 19.1.2.1
 ---*/
 
-verifyWritable(Object, "assign");
-verifyNotEnumerable(Object, "assign");
-verifyConfigurable(Object, "assign");
+verifyProperty(Object, "assign", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/assign/assign-length.js b/js/src/tests/test262/built-ins/Object/assign/assign-length.js
index bcfe2e2eda..600508b7b0 100644
--- a/js/src/tests/test262/built-ins/Object/assign/assign-length.js
+++ b/js/src/tests/test262/built-ins/Object/assign/assign-length.js
@@ -15,12 +15,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Object.assign.length, 2, "The length property of the assign method should be 2."
-);
-
-verifyNotEnumerable(Object.assign, 'length');
-verifyNotWritable(Object.assign, 'length');
-verifyConfigurable(Object.assign, 'length');
+verifyProperty(Object.assign, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/assign/name.js b/js/src/tests/test262/built-ins/Object/assign/name.js
index bab32445c2..c67ef4b8e0 100644
--- a/js/src/tests/test262/built-ins/Object/assign/name.js
+++ b/js/src/tests/test262/built-ins/Object/assign/name.js
@@ -19,14 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Object.assign.name,
-  'assign',
-  'The value of `Object.assign.name` is `"assign"`'
-);
-
-verifyNotEnumerable(Object.assign, 'name');
-verifyNotWritable(Object.assign, 'name');
-verifyConfigurable(Object.assign, 'name');
+verifyProperty(Object.assign, "name", {
+  value: "assign",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/assign/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/assign/not-a-constructor.js
index 3c66a4c64a..b94cd4b8e6 100644
--- a/js/src/tests/test262/built-ins/Object/assign/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/assign/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.assign), false, 'isConstructor(Object.assi
 
 assert.throws(TypeError, () => {
   new Object.assign({});
-}, '`new Object.assign({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-100.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-100.js
index ed3a1d5d13..a0c715b273 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-100.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-100.js
@@ -15,7 +15,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"), "expected newObj to have 'prop'");
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-101.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-101.js
index f325ce5059..4f2cd35373 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-101.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-101.js
@@ -15,7 +15,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-103.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-103.js
index 4da2d10566..811c119bc2 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-103.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-103.js
@@ -26,7 +26,8 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-104.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-104.js
index b76ea8de8b..b5e01360a6 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-104.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-104.js
@@ -29,7 +29,8 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-107.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-107.js
index 867a3f4e8c..8cdc1a6017 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-107.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-107.js
@@ -28,7 +28,8 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-108.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-108.js
index 14d9da3a70..bab1b7a16b 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-108.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-108.js
@@ -31,7 +31,8 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-109.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-109.js
index 8a38c3975e..20bf5a59cb 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-109.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-109.js
@@ -19,7 +19,8 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-110.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-110.js
index 9ac2bcea84..60d6fdc53a 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-110.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-110.js
@@ -29,7 +29,8 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-111.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-111.js
index e979fe76d7..0b46894531 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-111.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-111.js
@@ -24,7 +24,8 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-125.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-125.js
index 17eef5947c..8687b5e1d0 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-125.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-125.js
@@ -15,8 +15,8 @@ var newObj = Object.create({}, {
   }
 });
 
-
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-126.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-126.js
index 489b57cf3e..42d3dddcee 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-126.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-126.js
@@ -15,7 +15,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-128.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-128.js
index 77cb2171ae..4e1669e5d4 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-128.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-128.js
@@ -15,7 +15,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-129.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-129.js
index 1cf82338ee..e16ee5219a 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-129.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-129.js
@@ -15,7 +15,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-130.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-130.js
index 30855dd7c6..2e8b5ebe33 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-130.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-130.js
@@ -15,8 +15,8 @@ var newObj = Object.create({}, {
   }
 });
 
-
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-131.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-131.js
index a27ff05e7e..6e86080eb6 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-131.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-131.js
@@ -15,7 +15,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-132.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-132.js
index 0f59a2aa10..00f9ef0d31 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-132.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-132.js
@@ -15,7 +15,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-135.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-135.js
index d6aef6ae19..a74ecda218 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-135.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-135.js
@@ -15,7 +15,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-179.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-179.js
index ceb1884864..e5df5e0c3d 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-179.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-179.js
@@ -15,7 +15,9 @@ var newObj = Object.create({}, {
   }
 });
 
-assert.sameValue(newObj.prop, 100);
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: 100,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-188.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-188.js
index 91d8c80a52..3d7c3d84f5 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-188.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-188.js
@@ -22,7 +22,9 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert.sameValue(newObj.prop, 100);
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: 100,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-189.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-189.js
index 13f8a80bd2..a50b416503 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-189.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-189.js
@@ -31,8 +31,9 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert(newObj.hasOwnProperty("prop"))
-assert.sameValue(typeof(newObj.prop), "undefined");
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: undefined,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-190.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-190.js
index 039dd3b032..28f3dfd9ff 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-190.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-190.js
@@ -27,7 +27,9 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert.sameValue(newObj.prop, 100);
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: 100,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-204.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-204.js
index 17993ba415..c965df9186 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-204.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-204.js
@@ -15,8 +15,9 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-assert.sameValue(typeof newObj.prop, "undefined");
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: undefined,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-205.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-205.js
index 7e414aa5dd..960a0263ef 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-205.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-205.js
@@ -15,8 +15,9 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-assert.sameValue(typeof newObj.prop, "undefined");
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: undefined,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-207.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-207.js
index 40513388d8..c1b7043ec6 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-207.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-207.js
@@ -15,8 +15,9 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-assert.sameValue(typeof newObj.prop, "undefined");
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: undefined,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-208.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-208.js
index 864af6abf5..0e67c30cb8 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-208.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-208.js
@@ -15,8 +15,9 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-assert.sameValue(typeof newObj.prop, "undefined");
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: undefined,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-209.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-209.js
index 057ad51efe..135391d72e 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-209.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-209.js
@@ -15,8 +15,9 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-assert.sameValue(typeof newObj.prop, "undefined");
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: undefined,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-210.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-210.js
index d6ff45fb8c..6ec80189af 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-210.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-210.js
@@ -15,8 +15,9 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"))
-assert.sameValue(typeof newObj.prop, "undefined");
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: undefined,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-211.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-211.js
index 84a03d23c3..bf6d20941e 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-211.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-211.js
@@ -15,8 +15,9 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-assert.sameValue(typeof newObj.prop, "undefined")
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: undefined,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-214.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-214.js
index 209db64dda..e80e422d9d 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-214.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-214.js
@@ -17,8 +17,9 @@ var newObj = Object.create({}, {
   prop: descObj
 });
 
-assert(newObj.hasOwnProperty("prop"))
-assert.sameValue(typeof newObj.prop, "undefined");
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  value: undefined,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-307.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-307.js
index 02d1a9e465..0f969ae43b 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-307.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-307.js
@@ -17,7 +17,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotWritable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-309.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-309.js
index 41f48bb638..2977950c78 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-309.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-309.js
@@ -18,7 +18,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-311.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-311.js
index 169e7a69b9..a8c67f0b15 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-311.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-311.js
@@ -7,6 +7,7 @@ description: >
     Object.create - [[Set]] is set as undefined if it is absent in
     accessor descriptor of one property in 'Properties' (8.12.9 step
     4.b)
+includes: [propertyHelper.js]
 ---*/
 
 var newObj = Object.create({}, {
@@ -27,21 +28,12 @@ if (newObj.prop === "verifyCreate") {
   verifyGet = true;
 }
 
-var verifyEnumerable = false;
-for (var p in newObj) {
-  if (p === "prop") {
-    verifyEnumerable = true;
-  }
-}
-
-var verifyConfigurable = false;
-var hasProperty = newObj.hasOwnProperty("prop");
-delete newObj.prop;
-verifyConfigurable = !newObj.hasOwnProperty("prop") && hasProperty;
-
 assert(verifySet, 'verifySet !== true');
 assert(verifyGet, 'verifyGet !== true');
-assert(verifyEnumerable, 'verifyEnumerable !== true');
-assert(verifyConfigurable, 'verifyConfigurable !== true');
+
+verifyProperty(newObj, "prop", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-313.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-313.js
index b3b0299d4e..988d79ae82 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-313.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-313.js
@@ -18,7 +18,8 @@ var newObj = Object.create({}, {
   }
 });
 
-assert(newObj.hasOwnProperty("prop"));
-verifyNotConfigurable(newObj, "prop");
+verifyProperty(newObj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-315.js b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-315.js
index 2c381680ce..5474af39cb 100644
--- a/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-315.js
+++ b/js/src/tests/test262/built-ins/Object/create/15.2.3.5-4-315.js
@@ -34,20 +34,20 @@ newObj = Object.create({}, {
   }
 });
 
-verifyEqualTo(newObj, "foo1", 200);
-
-verifyWritable(newObj, "foo1");
-
-verifyEnumerable(newObj, "foo1");
-
-verifyConfigurable(newObj, "foo1");
+verifyProperty(newObj, "foo1", {
+  value: 200,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 verifyEqualTo(newObj, "foo2", getFunc());
 
 verifyWritable(newObj, "foo2", "setVerifyHelpProp");
 
-verifyEnumerable(newObj, "foo2");
-
-verifyConfigurable(newObj, "foo2");
+verifyProperty(newObj, "foo2", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/name.js b/js/src/tests/test262/built-ins/Object/create/name.js
index 63cfe5f126..3555fac0ab 100644
--- a/js/src/tests/test262/built-ins/Object/create/name.js
+++ b/js/src/tests/test262/built-ins/Object/create/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.create.name, "create");
-
-verifyNotEnumerable(Object.create, "name");
-verifyNotWritable(Object.create, "name");
-verifyConfigurable(Object.create, "name");
+verifyProperty(Object.create, "name", {
+  value: "create",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/create/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/create/not-a-constructor.js
index 00efa6dc33..86e898b19a 100644
--- a/js/src/tests/test262/built-ins/Object/create/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/create/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.create), false, 'isConstructor(Object.crea
 
 assert.throws(TypeError, () => {
   new Object.create(null);
-}, '`new Object.create(null)` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-138.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-138.js
index 1ca3793d7b..65fada01d7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-138.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-138.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-139.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-139.js
index f73e256111..a0522ec731 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-139.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-139.js
@@ -17,6 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-140.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-140.js
index 5e059a4a76..bc0aaee31f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-140.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-140.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-141.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-141.js
index da71de2a5e..9be76bcecf 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-141.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-141.js
@@ -24,7 +24,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-142.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-142.js
index 226a32e614..7f68e3a3d3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-142.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-142.js
@@ -27,7 +27,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-143.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-143.js
index 0336ed473b..e22d52d4f8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-143.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-143.js
@@ -35,7 +35,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-144.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-144.js
index 1fc7a18431..db1f2541fd 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-144.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-144.js
@@ -23,7 +23,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-146.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-146.js
index 4cd423d4aa..c1bfdc8238 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-146.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-146.js
@@ -31,7 +31,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-147.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-147.js
index 8d1b4a1b50..a6a0dc8021 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-147.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-147.js
@@ -35,7 +35,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-148.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-148.js
index 63cb98e814..393b64d1bf 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-148.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-148.js
@@ -21,7 +21,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-149.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-149.js
index 1c2556cbc8..069f8267ce 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-149.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-149.js
@@ -33,7 +33,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-150.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-150.js
index 4c4b1717dc..dd4c0627c2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-150.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-150.js
@@ -27,7 +27,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-151.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-151.js
index 65c386d29e..52b27802bb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-151.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-151.js
@@ -22,7 +22,8 @@ Object.defineProperties(obj, {
   property: func
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-152.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-152.js
index 8c48fb76e7..9f41fd0f16 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-152.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-152.js
@@ -20,7 +20,8 @@ Object.defineProperties(obj, {
   property: arr
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-153.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-153.js
index bb53c4479c..8350b76d13 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-153.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-153.js
@@ -20,7 +20,8 @@ Object.defineProperties(obj, {
   property: str
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-154.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-154.js
index 9169fecaa5..f525efe3bc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-154.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-154.js
@@ -20,7 +20,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-155.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-155.js
index 9e00beb444..4c9fc79514 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-155.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-155.js
@@ -20,7 +20,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-156.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-156.js
index 2ecb58c0ff..32f35ad65a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-156.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-156.js
@@ -19,7 +19,8 @@ Object.defineProperties(obj, {
   property: Math
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-157.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-157.js
index f59bf901cf..2f8b893640 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-157.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-157.js
@@ -20,7 +20,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-158.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-158.js
index 3dfaede9c5..d496fb8c3f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-158.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-158.js
@@ -20,7 +20,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-159.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-159.js
index 8aa6779cc4..0caea972f3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-159.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-159.js
@@ -18,7 +18,8 @@ Object.defineProperties(obj, {
   property: JSON
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-160.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-160.js
index 5b32ddb731..4c25c2e3f8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-160.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-160.js
@@ -20,7 +20,8 @@ Object.defineProperties(obj, {
   property: descObj
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-161.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-161.js
index 1b952cf469..b716822825 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-161.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-161.js
@@ -19,8 +19,9 @@ var func = function(a, b) {
     property: arguments
   });
 
-  assert(obj.hasOwnProperty("property"));
-  verifyNotWritable(obj, "property");
+  verifyProperty(obj, "property", {
+    writable: false,
+  });
 };
 
 func();
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-163.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-163.js
index 16940fe042..0592cacc01 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-163.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-163.js
@@ -19,7 +19,8 @@ Object.defineProperties(obj, {
   property: this
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-164.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-164.js
index 46ee75a0b4..e02de2a1c8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-164.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-164.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-165.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-165.js
index 4c84d6a35f..88f2995544 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-165.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-165.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-167.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-167.js
index 93001e24f6..edcadba7ad 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-167.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-167.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-168.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-168.js
index 59e2d01fe4..e7e798f730 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-168.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-168.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-169.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-169.js
index 1482e22d29..b0f1b30c4a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-169.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-169.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-170.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-170.js
index 44fcd2d56f..8027fce780 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-170.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-170.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-171.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-171.js
index 5a4d2a2dda..b77bbe2b3d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-171.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-171.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-174.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-174.js
index d018248861..dbadab16b2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-174.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-174.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-60.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-60.js
index a213b737e8..3764293f9b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-60.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-60.js
@@ -16,7 +16,8 @@ Object.defineProperties(obj, {
   prop: {}
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-63.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-63.js
index 3564a3c259..fcf969e5eb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-63.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-63.js
@@ -28,7 +28,8 @@ Object.defineProperties(obj, {
   prop: descObj
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-64.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-64.js
index 895a3897ef..f3dd14d728 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-64.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-64.js
@@ -31,7 +31,8 @@ Object.defineProperties(obj, {
   prop: descObj
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-67.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-67.js
index b9abacb080..513a5bdd5f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-67.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-67.js
@@ -30,7 +30,8 @@ Object.defineProperties(obj, {
   prop: descObj
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-68.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-68.js
index bc74560e09..53d33da07e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-68.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-68.js
@@ -33,8 +33,8 @@ Object.defineProperties(obj, {
   prop: descObj
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
-assert(obj.hasOwnProperty("prop"));
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-69.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-69.js
index baa2e16a9c..d2f6ee592e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-69.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-69.js
@@ -20,7 +20,8 @@ Object.defineProperties(obj, {
   prop: descObj
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-70.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-70.js
index ef2e2468f2..5a354476bb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-70.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-70.js
@@ -31,7 +31,8 @@ Object.defineProperties(obj, {
   prop: descObj
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-71.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-71.js
index b0915952d0..a610b091ca 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-71.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-71.js
@@ -25,7 +25,8 @@ Object.defineProperties(obj, {
   prop: descObj
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-85.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-85.js
index 4417c630c6..94c392693d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-85.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-85.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-86.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-86.js
index 2745ab8dc5..a856931390 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-86.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-86.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-88.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-88.js
index 461bc8e7eb..c7f4adced9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-88.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-88.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-89.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-89.js
index 79c808f491..be36e00228 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-89.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-89.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-90.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-90.js
index 198d61ea03..ccb64939b7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-90.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-90.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-91.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-91.js
index 701fe1df53..40b32a4e38 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-91.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-91.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-92.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-92.js
index b7997b1714..cda32f5710 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-92.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-92.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-95.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-95.js
index db02d8a4c9..277eea621a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-95.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-5-b-95.js
@@ -17,7 +17,8 @@ Object.defineProperties(obj, {
   }
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-100.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-100.js
index 47bc46e287..dfe8e37455 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-100.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-100.js
@@ -25,12 +25,12 @@ Object.defineProperties(obj, {
     configurable: false
   }
 });
-verifyEqualTo(obj, "foo", 200);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 200,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-101.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-101.js
index 462fb436d4..a0292d8c7f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-101.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-101.js
@@ -41,8 +41,9 @@ verifyEqualTo(obj, "foo", get_func2());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-102.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-102.js
index a52e3b7580..6691b4e82e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-102.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-102.js
@@ -34,8 +34,9 @@ Object.defineProperties(obj, {
 });
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-103.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-103.js
index 69239b2647..6963afe790 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-103.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-103.js
@@ -36,8 +36,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-104.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-104.js
index 9723898ac6..75e893ec15 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-104.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-104.js
@@ -41,8 +41,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-105.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-105.js
index e8557c7375..5e04bee2d5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-105.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-105.js
@@ -6,6 +6,7 @@ es5id: 15.2.3.7-6-a-105
 description: >
     Object.defineProperties - 'P' is accessor property, P.[[Set]] is
     present and properties.[[Set]] is undefined (8.12.9 step 12)
+includes: [propertyHelper.js]
 ---*/
 
 var obj = {};
@@ -31,7 +32,6 @@ Object.defineProperties(obj, {
   }
 });
 
-var hasProperty = obj.hasOwnProperty("property");
 var verifyGet = false;
 verifyGet = (obj.property === 10);
 
@@ -39,21 +39,13 @@ var verifySet = false;
 var desc = Object.getOwnPropertyDescriptor(obj, "property");
 verifySet = (typeof desc.set === 'undefined');
 
-var verifyEnumerable = false;
-for (var p in obj) {
-  if (p === "property") {
-    verifyEnumerable = true;
-  }
-}
-
-var verifyConfigurable = false;
-delete obj.property;
-verifyConfigurable = obj.hasOwnProperty("property");
+verifyProperty(obj, "property", {
+  enumerable: true,
+  configurable: true,
+});
 
-assert(hasProperty, 'hasProperty !== true');
 assert(verifyGet, 'verifyGet !== true');
 assert(verifySet, 'verifySet !== true');
-assert(verifyEnumerable, 'verifyEnumerable !== true');
-assert.sameValue(verifyConfigurable, false, 'verifyConfigurable');
+
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-106.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-106.js
index 67cf09ee28..fff80e4e60 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-106.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-106.js
@@ -36,8 +36,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-107.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-107.js
index 87f7990aaa..95f6f95731 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-107.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-107.js
@@ -36,8 +36,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-108.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-108.js
index cf434bfbd8..63f1b17621 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-108.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-108.js
@@ -36,8 +36,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-109.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-109.js
index 021bf58825..ccce309d3b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-109.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-109.js
@@ -44,8 +44,9 @@ verifyEqualTo(obj, "foo", get_func2());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-110.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-110.js
index 1dca6bcb2f..71a658e156 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-110.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-110.js
@@ -36,19 +36,21 @@ var properties = {
 };
 
 Object.defineProperties(obj, properties);
-verifyEqualTo(obj, "foo1", 200);
 
-verifyWritable(obj, "foo1");
+verifyProperty(obj, "foo1", {
+  value: 200,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
-verifyEnumerable(obj, "foo1");
-
-verifyConfigurable(obj, "foo1");
 verifyEqualTo(obj, "foo2", get_func());
 
 verifyWritable(obj, "foo2", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo2");
-
-verifyConfigurable(obj, "foo2");
+verifyProperty(obj, "foo2", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-114-b.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-114-b.js
index dd6222e964..fe50a5bf47 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-114-b.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-114-b.js
@@ -24,8 +24,9 @@ verifyEqualTo(arr, "length", 0);
 
 verifyWritable(arr, "length", "length", 1);
 
-verifyNotEnumerable(arr, "length");
-
-verifyNotConfigurable(arr, "length");
+verifyProperty(arr, "length", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-114.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-114.js
index 2afb374774..d11ce306db 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-114.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-114.js
@@ -26,8 +26,9 @@ verifyEqualTo(arr, "length", 2);
 
 verifyWritable(arr, "length", "length", 5);
 
-verifyNotEnumerable(arr, "length");
-
-verifyNotConfigurable(arr, "length");
+verifyProperty(arr, "length", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-115.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-115.js
index 239ba3bb3e..7bd6e47c8d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-115.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-115.js
@@ -24,10 +24,11 @@ Object.defineProperties(arr, {
 assert.sameValue(arr.length, 0);
 
 arr.length = 2;
-assert.sameValue(arr.length, 2);
 
-verifyNotEnumerable(arr, "length");
-
-verifyNotConfigurable(arr, "length");
+verifyProperty(arr, "length", {
+  value: 2,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-12.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-12.js
index 0c195e5e0d..323e2e3f49 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-12.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-12.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(fun, "prop", 11);
-
-  verifyNotWritable(fun, "prop");
-
-  verifyNotEnumerable(fun, "prop");
-
-  verifyNotConfigurable(fun, "prop");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(fun, "prop", {
+  value: 11,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-120.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-120.js
index 4704109b46..0b7585f683 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-120.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-120.js
@@ -19,12 +19,11 @@ Object.defineProperties(arr, {
   }
 });
 
-verifyEqualTo(arr, "length", 0);
-
-verifyNotWritable(arr, "length");
-
-verifyNotEnumerable(arr, "length");
-
-verifyNotConfigurable(arr, "length");
+verifyProperty(arr, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-13.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-13.js
index be22cb8d81..daf0c3e4ec 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-13.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-13.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "prop", 11);
-
-  verifyNotWritable(arr, "prop");
-
-  verifyNotEnumerable(arr, "prop");
-
-  verifyNotConfigurable(arr, "prop");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "prop", {
+  value: 11,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-14.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-14.js
index 3ecd73ab51..3de547f1e7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-14.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-14.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(str, "prop", 11);
-
-  verifyNotWritable(str, "prop");
-
-  verifyNotEnumerable(str, "prop");
-
-  verifyNotConfigurable(str, "prop");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(str, "prop", {
+  value: 11,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-15.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-15.js
index a86aaa2ec5..ede416b548 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-15.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-15.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "prop", 11);
-
-  verifyNotWritable(obj, "prop");
-
-  verifyNotEnumerable(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "prop", {
+  value: 11,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-16.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-16.js
index e78dcaa3e2..1e72361437 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-16.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-16.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "prop", 11);
-
-  verifyNotWritable(obj, "prop");
-
-  verifyNotEnumerable(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "prop", {
+  value: 11,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-163.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-163.js
index cbe3a65ff3..7359782f32 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-163.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-163.js
@@ -24,10 +24,12 @@ Object.defineProperties(arr, {
 });
 
 //try to overwrite length value of arr
-verifyNotWritable(arr, "length")
+verifyProperty(arr, "length", {
+  value: 1,
+  writable: false,
+});
 
 assert(!arr.hasOwnProperty("1"));
-assert.sameValue(arr.length, 1);
 assert.sameValue(arr[0], 0);
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-164.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-164.js
index f699551ca6..f7bd847919 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-164.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-164.js
@@ -31,8 +31,11 @@ try {
   throw new Test262Error("expected to throw TypeError")
 } catch (e) {
   assert(e instanceof TypeError);
-  assert.sameValue(arr.length, 2);
-  verifyNotWritable(arr, "length");
 }
 
+verifyProperty(arr, "length", {
+  value: 2,
+  writable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-176.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-176.js
index 7117baebef..cbcebe0b84 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-176.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-176.js
@@ -31,11 +31,16 @@ try {
   throw new Test262Error("Expected to throw TypeError");
 } catch (e) {
   assert(e instanceof TypeError);
-  assert(arr.hasOwnProperty("1"));
-  verifyNotWritable(arr, "length");
-  assert.sameValue(arr[0], 0);
-  assert.sameValue(arr[1], 1);
-  assert.sameValue(arr.length, 2)
 }
 
+assert(arr.hasOwnProperty("1"));
+
+verifyProperty(arr, "length", {
+  value: 2,
+  writable: false,
+});
+
+assert.sameValue(arr[0], 0);
+assert.sameValue(arr[1], 1);
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-177.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-177.js
index 1ebd1320be..5bcbd47137 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-177.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-177.js
@@ -24,8 +24,11 @@ Object.defineProperties(arr, {
 });
 
 assert(!arr.hasOwnProperty("1"));
-assert.sameValue(arr.length, 0);
 assert(!arr.hasOwnProperty("0"));
-verifyNotWritable(arr, "length");
+
+verifyProperty(arr, "length", {
+  value: 0,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-18.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-18.js
index fcd1e5d0d7..0c037c61f7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-18.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-18.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "prop", 11);
-
-  verifyNotWritable(obj, "prop");
-
-  verifyNotEnumerable(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "prop", {
+  value: 11,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-19.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-19.js
index 9d5111dd19..f4a223d68e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-19.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-19.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "prop", 11);
-
-  verifyNotWritable(obj, "prop");
-
-  verifyNotEnumerable(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "prop", {
+  value: 11,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-195.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-195.js
index 46e202818f..7ba221bf61 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-195.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-195.js
@@ -19,12 +19,11 @@ Object.defineProperties(arr, {
   }
 });
 
-verifyEqualTo(arr, "0", undefined);
-
-verifyNotWritable(arr, "0");
-
-verifyEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-197.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-197.js
index c95e92a883..b4b4f90351 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-197.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-197.js
@@ -24,8 +24,9 @@ Object.defineProperties(arr, {
   }
 });
 
-assert(arr.hasOwnProperty("0"));
-verifyNotWritable(arr, "0");
-assert.sameValue(arr[0], 1001);
+verifyProperty(arr, "0", {
+  value: 1001,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-199.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-199.js
index 5d24369753..97417e1683 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-199.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-199.js
@@ -24,8 +24,8 @@ Object.defineProperties(arr, {
   }
 });
 
-assert(arr.hasOwnProperty("0"));
-verifyNotConfigurable(arr, "0");
-assert(arr.hasOwnProperty("0"));
+verifyProperty(arr, "0", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-2.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-2.js
index 19de43a79c..883e70de76 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-2.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-2.js
@@ -26,12 +26,11 @@ Object.defineProperties(obj, {
   }
 });
 
-verifyEqualTo(obj, "prop", 12);
-
-verifyNotWritable(obj, "prop");
-
-verifyNotEnumerable(obj, "prop");
-
-verifyConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-200.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-200.js
index b382c908c7..7c43a21b62 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-200.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-200.js
@@ -21,12 +21,11 @@ Object.defineProperties(arr, {
   }
 });
 
-verifyEqualTo(arr, "0", 1001);
-
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-202.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-202.js
index 6997fab614..8a1c4998e5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-202.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-202.js
@@ -8,6 +8,7 @@ description: >
     named property, 'P' property doesn't exist in 'O', test [[Set]] of
     'P' property in 'Attributes' is set as undefined value if [[Set]]
     is absent in accessor descriptor 'desc'  (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
 ---*/
 
 var arr = [];
@@ -23,24 +24,14 @@ Object.defineProperties(arr, {
   }
 });
 
-var verifyEnumerable = false;
-for (var i in arr) {
-  if (i === "0" && arr.hasOwnProperty("0")) {
-    verifyEnumerable = true;
-  }
-}
-
 var desc = Object.getOwnPropertyDescriptor(arr, "0");
-var propertyDefineCorrect = arr.hasOwnProperty("0");
 
-var verifyConfigurable = false;
-delete arr[0];
-verifyConfigurable = arr.hasOwnProperty("0");
+verifyProperty(arr, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
-assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
 assert.sameValue(desc.get, getFunc, 'desc.get');
-assert.sameValue(verifyConfigurable, false, 'verifyConfigurable');
-assert(verifyEnumerable, 'verifyEnumerable !== true');
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-204.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-204.js
index ef679dcc11..1cddaa0ff7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-204.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-204.js
@@ -39,6 +39,8 @@ if (arr.verifySetter !== 101) {
   throw new Test262Error('Expected arr.verifySetter === 101, actually ' + arr.verifySetter);
 }
 
-verifyNotConfigurable(arr, 0);
+verifyProperty(arr, "0", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-205.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-205.js
index 46d98ea0a0..1ebeaac1f8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-205.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-205.js
@@ -42,8 +42,9 @@ verifyEqualTo(arr, "0", getFun());
 
 verifyWritable(arr, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-206.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-206.js
index a322992ba4..30e0beb774 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-206.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-206.js
@@ -18,12 +18,12 @@ arr[0] = 101; // default value of attributes: writable: true, configurable: true
 Object.defineProperties(arr, {
   "0": {}
 });
-verifyEqualTo(arr, "0", 101);
 
-verifyWritable(arr, "0");
-
-verifyEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: 101,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-207.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-207.js
index 46d88c42e1..19ab6047b9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-207.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-207.js
@@ -34,8 +34,9 @@ verifyEqualTo(arr, "0", get_func());
 
 verifyWritable(arr, "0", "setVerifyHelpProp");
 
-verifyEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-208.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-208.js
index 7d7f6ae685..33b1beff19 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-208.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-208.js
@@ -24,12 +24,12 @@ Object.defineProperties(arr, {
   }
 });
 
-verifyEqualTo(arr, "0", 100);
-
-verifyWritable(arr, "0");
-
-verifyEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: 100,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+  
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-209.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-209.js
index 48d71fdc94..1935f25ea8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-209.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-209.js
@@ -38,8 +38,9 @@ verifyEqualTo(arr, "0", get_func());
 
 verifyWritable(arr, "0", "setVerifyHelpProp");
 
-verifyEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-21.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-21.js
index 174de35bac..6f58cf7632 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-21.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-21.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "prop", 11);
-
-  verifyNotWritable(obj, "prop");
-
-  verifyNotEnumerable(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "prop", {
+  value: 11,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-210.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-210.js
index 5d74f4dfd0..2809a05d15 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-210.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-210.js
@@ -22,12 +22,12 @@ Object.defineProperties(arr, {
     value: undefined
   }
 });
-verifyEqualTo(arr, "0", undefined);
 
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-211.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-211.js
index 163eb6c69f..f1f02085c9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-211.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-211.js
@@ -21,12 +21,12 @@ Object.defineProperties(arr, {
     value: null
   }
 });
-verifyEqualTo(arr, "0", null);
 
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: null,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-212.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-212.js
index d6aa9bdf5b..7d32ce4958 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-212.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-212.js
@@ -22,12 +22,11 @@ Object.defineProperties(arr, {
   }
 });
 
-verifyEqualTo(arr, "0", NaN);
-
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: NaN,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-213.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-213.js
index b9bff48f9d..000b189084 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-213.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-213.js
@@ -24,18 +24,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "0", -0);
-
-  verifyNotWritable(arr, "0");
-
-  verifyNotEnumerable(arr, "0");
-
-  verifyNotConfigurable(arr, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "0", {
+  value: -0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-214.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-214.js
index 356f64d1bd..934d03d507 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-214.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-214.js
@@ -24,18 +24,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "0", +0);
-
-  verifyNotWritable(arr, "0");
-
-  verifyNotEnumerable(arr, "0");
-
-  verifyNotConfigurable(arr, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "0", {
+  value: +0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-215.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-215.js
index ea5c1a2d3f..4cc0c47522 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-215.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-215.js
@@ -22,12 +22,12 @@ Object.defineProperties(arr, {
     value: 101
   }
 });
-verifyEqualTo(arr, "0", 101);
 
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: 101,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-216.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-216.js
index b658b05038..bda83e12a4 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-216.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-216.js
@@ -22,12 +22,12 @@ Object.defineProperties(arr, {
     value: "abcd"
   }
 });
-verifyEqualTo(arr, "0", "abcd");
 
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: "abcd",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-217.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-217.js
index 94e975a2cb..cf81d69f53 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-217.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-217.js
@@ -22,12 +22,12 @@ Object.defineProperties(arr, {
     value: true
   }
 });
-verifyEqualTo(arr, "0", true);
 
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: true,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-218.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-218.js
index 9fefdec9a6..c8998fdd88 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-218.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-218.js
@@ -27,12 +27,12 @@ var properties = {
 };
 
 Object.defineProperties(arr, properties);
-verifyEqualTo(arr, "0", obj1);
 
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-219.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-219.js
index 50afb5f2b0..7e53f2f81f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-219.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-219.js
@@ -21,12 +21,12 @@ Object.defineProperties(arr, {
     writable: true
   }
 });
-verifyEqualTo(arr, "0", undefined);
 
-verifyWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: undefined,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-220.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-220.js
index e655774ae2..b6a031738f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-220.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-220.js
@@ -22,12 +22,12 @@ Object.defineProperties(arr, {
     writable: false
   }
 });
-verifyEqualTo(arr, "0", undefined);
 
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-221.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-221.js
index f3d107084e..a2ee179aba 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-221.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-221.js
@@ -28,8 +28,9 @@ Object.defineProperties(arr, {
 });
 verifyEqualTo(arr, "0", get_func());
 
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-222.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-222.js
index b9f60bdb8f..eaaf719083 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-222.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-222.js
@@ -28,8 +28,9 @@ Object.defineProperties(arr, {
 });
 verifyWritable(arr, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-223.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-223.js
index 25c4ab4089..f66435c528 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-223.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-223.js
@@ -21,12 +21,12 @@ Object.defineProperties(arr, {
     enumerable: true
   }
 });
-verifyEqualTo(arr, "0", undefined);
 
-verifyNotWritable(arr, "0");
-
-verifyEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-224.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-224.js
index 127f8f89dd..e27cf9f8dd 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-224.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-224.js
@@ -22,12 +22,12 @@ Object.defineProperties(arr, {
     enumerable: false
   }
 });
-verifyEqualTo(arr, "0", undefined);
 
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-225.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-225.js
index 9db9a3514d..ecd4214862 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-225.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-225.js
@@ -21,12 +21,12 @@ Object.defineProperties(arr, {
     configurable: true
   }
 });
-verifyEqualTo(arr, "0", undefined);
 
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-226.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-226.js
index 0b839c70e3..783378d959 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-226.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-226.js
@@ -21,12 +21,12 @@ Object.defineProperties(arr, {
     configurable: false
   }
 });
-verifyEqualTo(arr, "0", undefined);
 
-verifyNotWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-227.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-227.js
index 7e0a0eb3b8..2df44c3abe 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-227.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-227.js
@@ -27,18 +27,16 @@ try {
     }
   });
 } catch (e) {
-  verifyEqualTo(arr, "1", 3);
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: 3,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-228.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-228.js
index ae93f23bb1..66fcadb131 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-228.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-228.js
@@ -31,18 +31,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "1", 3);
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: 3,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-229.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-229.js
index 52eeb0b5ef..08df4167f5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-229.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-229.js
@@ -35,14 +35,14 @@ try {
 } catch (e) {
   verifyWritable(arr, "1", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-230.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-230.js
index 70c1ebbcab..5b385533ed 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-230.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-230.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "1", 3);
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: 3,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-231.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-231.js
index 77e43c731c..58ab02eb54 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-231.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-231.js
@@ -27,8 +27,9 @@ Object.defineProperties(arr, {
 
 verifyWritable(arr, "1", "setVerifyHelpProp");
 
-verifyEnumerable(arr, "1");
-
-verifyConfigurable(arr, "1");
+verifyProperty(arr, "1", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-232.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-232.js
index a8f2187f8c..f585634fa1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-232.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-232.js
@@ -28,12 +28,11 @@ Object.defineProperties(arr, {
   }
 });
 
-verifyEqualTo(arr, "1", 12);
-
-verifyNotWritable(arr, "1");
-
-verifyNotEnumerable(arr, "1");
-
-verifyConfigurable(arr, "1");
+verifyProperty(arr, "1", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-233.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-233.js
index cc3247a9c7..5aa8ecd912 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-233.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-233.js
@@ -30,18 +30,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "1", undefined);
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-234.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-234.js
index 668e02eb0f..15279c0e89 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-234.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-234.js
@@ -32,18 +32,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "1", 3);
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: 3,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-235.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-235.js
index a4becc4796..63526b84e9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-235.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-235.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "1", +0);
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: +0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-236.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-236.js
index 7a76261002..8ccd912ed0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-236.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-236.js
@@ -27,18 +27,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "1", -0);
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: -0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-237.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-237.js
index 9914b27c44..5332d11ce9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-237.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-237.js
@@ -28,18 +28,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "1", 12);
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-238.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-238.js
index 5928b5b299..5e6177b726 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-238.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-238.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "1", "abcd");
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: "abcd",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-239.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-239.js
index e27cf66f6e..a696416afe 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-239.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-239.js
@@ -28,18 +28,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "1", true);
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: true,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-24.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-24.js
index f57eb5d1db..8b95fea263 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-24.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-24.js
@@ -24,13 +24,12 @@ Object.defineProperties(this, {
   }
 });
 
-verifyEqualTo(this, "prop", 12);
-
-verifyWritable(this, "prop");
-
-verifyEnumerable(this, "prop");
-
-verifyConfigurable(this, "prop");
+verifyProperty(this, "prop", {
+  value: 12,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 delete this.prop;
 
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-240.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-240.js
index 3e22e8bf14..ce8c4c36a6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-240.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-240.js
@@ -34,18 +34,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "1", obj1);
-
-  verifyNotWritable(arr, "1");
-
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-241.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-241.js
index 6167a6ee64..17bb7efd40 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-241.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-241.js
@@ -34,14 +34,14 @@ try {
 } catch (e) {
   verifyWritable(arr, "1", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-242.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-242.js
index a794b04f0d..937341c5a5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-242.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-242.js
@@ -33,14 +33,14 @@ try {
 } catch (e) {
   verifyWritable(arr, "1", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-243.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-243.js
index 4f8ba301c4..9f1b7a70a2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-243.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-243.js
@@ -25,8 +25,9 @@ Object.defineProperties(arr, {
   }
 });
 
-verifyNotEnumerable(arr, "1");
-
-verifyNotConfigurable(arr, "1");
+verifyProperty(arr, "1", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-244.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-244.js
index 12d578b86f..4b7394ea5b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-244.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-244.js
@@ -36,14 +36,14 @@ try {
 } catch (e) {
   verifyEqualTo(arr, "1", get_fun());
 
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-245.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-245.js
index 046fc367f8..bb8670ee80 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-245.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-245.js
@@ -32,14 +32,14 @@ try {
 } catch (e) {
   verifyEqualTo(arr, "1", get_fun());
 
-  verifyNotEnumerable(arr, "1");
-
-  verifyNotConfigurable(arr, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "1", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-246.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-246.js
index f7bd329a1e..193596163a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-246.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-246.js
@@ -26,8 +26,9 @@ Object.defineProperties(arr, {
   }
 });
 
-verifyNotEnumerable(arr, "1");
-
-verifyNotConfigurable(arr, "1");
+verifyProperty(arr, "1", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-247.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-247.js
index f597aaf1af..99151a6eb0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-247.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-247.js
@@ -19,12 +19,12 @@ Object.defineProperties(arr, {
     value: 36
   }
 });
-verifyEqualTo(arr, "0", 36);
 
-verifyWritable(arr, "0");
-
-verifyEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: 36,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-248.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-248.js
index 547713544d..a5ec7a2b73 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-248.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-248.js
@@ -19,12 +19,12 @@ Object.defineProperties(arr, {
     value: undefined
   }
 });
-verifyEqualTo(arr, "0", undefined);
 
-verifyWritable(arr, "0");
-
-verifyEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: undefined,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-249.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-249.js
index 36907737c5..8a3179cc5b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-249.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-249.js
@@ -19,12 +19,12 @@ Object.defineProperties(arr, {
     value: 12
   }
 });
-verifyEqualTo(arr, "0", 12);
 
-verifyWritable(arr, "0");
-
-verifyEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: 12,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-250.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-250.js
index f247cfd64b..5332c7076e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-250.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-250.js
@@ -19,12 +19,12 @@ Object.defineProperties(arr, {
     writable: false
   }
 });
-verifyEqualTo(arr, "0", 100);
 
-verifyNotWritable(arr, "0");
-
-verifyEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: 100,
+  writable: false,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-251.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-251.js
index d8e2e29bf4..1ffc966b9f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-251.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-251.js
@@ -19,12 +19,12 @@ Object.defineProperties(arr, {
     enumerable: false
   }
 });
-verifyEqualTo(arr, "0", 12);
 
-verifyWritable(arr, "0");
-
-verifyNotEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: 12,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-252.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-252.js
index c74dba3fb4..dea3971ab4 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-252.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-252.js
@@ -19,12 +19,12 @@ Object.defineProperties(arr, {
     configurable: false
   }
 });
-verifyEqualTo(arr, "0", 12);
 
-verifyWritable(arr, "0");
-
-verifyEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: 12,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-253.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-253.js
index bec2effb09..4ec4199c2a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-253.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-253.js
@@ -21,12 +21,12 @@ Object.defineProperties(arr, {
     configurable: false
   }
 });
-verifyEqualTo(arr, "0", 36);
 
-verifyNotWritable(arr, "0");
-
-verifyEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  value: 36,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-254.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-254.js
index 5ff7603393..52dfbc2240 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-254.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-254.js
@@ -32,8 +32,9 @@ Object.defineProperties(arr, {
 });
 verifyEqualTo(arr, "0", get_fun());
 
-verifyNotEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-255.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-255.js
index ca5c0bb33f..e10cec2a3f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-255.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-255.js
@@ -26,8 +26,10 @@ Object.defineProperties(arr, {
     get: undefined
   }
 });
-verifyNotEnumerable(arr, "0");
 
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-256.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-256.js
index 5f2eec519b..5578340283 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-256.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-256.js
@@ -30,8 +30,9 @@ Object.defineProperties(arr, {
 });
 verifyEqualTo(arr, "0", get_fun());
 
-verifyNotEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-257.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-257.js
index 24ebf36025..6400a30657 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-257.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-257.js
@@ -30,8 +30,9 @@ Object.defineProperties(arr, {
 });
 verifyWritable(arr, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-258.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-258.js
index 0cb48c5eb7..45d2f9322b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-258.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-258.js
@@ -24,8 +24,10 @@ Object.defineProperties(arr, {
     set: undefined
   }
 });
-verifyNotEnumerable(arr, "0");
 
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-259.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-259.js
index 0e846489aa..9ea293761b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-259.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-259.js
@@ -29,8 +29,9 @@ Object.defineProperties(arr, {
 });
 verifyWritable(arr, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-260.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-260.js
index 62e09ab0f2..441fd014bf 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-260.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-260.js
@@ -30,8 +30,9 @@ Object.defineProperties(arr, {
 });
 verifyWritable(arr, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arr, "0");
-
-verifyConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-261.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-261.js
index 3a4aeaac10..a89d450ef1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-261.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-261.js
@@ -29,8 +29,9 @@ Object.defineProperties(arr, {
 });
 verifyWritable(arr, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-262.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-262.js
index ee319f6ff2..6ba5bf8bfc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-262.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-262.js
@@ -41,8 +41,9 @@ verifyEqualTo(arr, "0", get_fun());
 
 verifyWritable(arr, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arr, "0");
-
-verifyNotConfigurable(arr, "0");
+verifyProperty(arr, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-266.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-266.js
index 689bec9b21..a81edc844e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-266.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-266.js
@@ -22,13 +22,13 @@ Object.defineProperties(arr, {
     configurable: true
   }
 });
-verifyEqualTo(arr, "property", 12);
 
-verifyWritable(arr, "property");
-
-verifyEnumerable(arr, "property");
-
-verifyConfigurable(arr, "property");
+verifyProperty(arr, "property", {
+  value: 12,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 if (arr.length !== 0) {
   throw new Test262Error('Expected arr.length === 0, actually ' + arr.length);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-267.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-267.js
index c81aad2b3f..293f8f33a6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-267.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-267.js
@@ -33,9 +33,10 @@ verifyEqualTo(arr, "property", get_fun());
 
 verifyWritable(arr, "property", "setVerifyHelpProp");
 
-verifyEnumerable(arr, "property");
-
-verifyConfigurable(arr, "property");
+verifyProperty(arr, "property", {
+  enumerable: true,
+  configurable: true,
+});
 
 if (arr.length !== 0) {
   throw new Test262Error('Expected arr.length === 0, actually ' + arr.length);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-268.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-268.js
index 3f27c8552a..6ef189d40f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-268.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-268.js
@@ -38,8 +38,9 @@ verifyEqualTo(arr, "property", get_fun());
 
 verifyWritable(arr, "property", "verifySetFun");
 
-verifyNotEnumerable(arr, "property");
-
-verifyConfigurable(arr, "property");
+verifyProperty(arr, "property", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-269.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-269.js
index 217cd5b052..24d9bf430e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-269.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-269.js
@@ -21,13 +21,13 @@ Object.defineProperties(arr, {
     configurable: false
   }
 });
-verifyEqualTo(arr, "property", 12);
 
-verifyNotWritable(arr, "property");
-
-verifyNotEnumerable(arr, "property");
-
-verifyNotConfigurable(arr, "property");
+verifyProperty(arr, "property", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 if (arr.length !== 0) {
   throw new Test262Error('Expected arr.length === 0, actually ' + arr.length);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-270.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-270.js
index 1fb83b1df8..2750ef8cbd 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-270.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-270.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "property", 12);
-
-  verifyNotWritable(arr, "property");
-
-  verifyNotEnumerable(arr, "property");
-
-  verifyNotConfigurable(arr, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "property", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-271.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-271.js
index 01af4ede13..9ebe3f3c87 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-271.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-271.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "property", undefined);
-
-  verifyNotWritable(arr, "property");
-
-  verifyNotEnumerable(arr, "property");
-
-  verifyNotConfigurable(arr, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "property", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-272.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-272.js
index 1235a3604d..8bff8fee16 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-272.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-272.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "property", 12);
-
-  verifyNotWritable(arr, "property");
-
-  verifyNotEnumerable(arr, "property");
-
-  verifyNotConfigurable(arr, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "property", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-273.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-273.js
index 9d8807a77f..0108cff387 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-273.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-273.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arr, "property", 12);
-
-  verifyNotWritable(arr, "property");
-
-  verifyNotEnumerable(arr, "property");
-
-  verifyNotConfigurable(arr, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "property", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-274.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-274.js
index 87b8c4cb9a..0cab0ced4b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-274.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-274.js
@@ -39,14 +39,14 @@ try {
 
   verifyWritable(arr, "property", "verifySetFun");
 
-  verifyNotEnumerable(arr, "property");
-
-  verifyNotConfigurable(arr, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-275.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-275.js
index 73a3eb6ff6..7a13d69ddc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-275.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-275.js
@@ -30,14 +30,14 @@ try {
 } catch (e) {
   verifyWritable(arr, "property", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arr, "property");
-
-  verifyNotConfigurable(arr, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-276.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-276.js
index 4f44eedb27..cc4b257824 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-276.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-276.js
@@ -32,14 +32,14 @@ try {
 } catch (e) {
   verifyWritable(arr, "property", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arr, "property");
-
-  verifyNotConfigurable(arr, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-277.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-277.js
index 6015feab01..88cd60fb56 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-277.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-277.js
@@ -32,14 +32,14 @@ try {
 } catch (e) {
   verifyWritable(arr, "property", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arr, "property");
-
-  verifyNotConfigurable(arr, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arr, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-278.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-278.js
index ee646acae0..380cbf887c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-278.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-278.js
@@ -30,12 +30,11 @@ Object.defineProperties(arg, {
   }
 });
 
-verifyEqualTo(arg, "0", 10);
-
-verifyWritable(arg, "0");
-
-verifyEnumerable(arg, "0");
-
-verifyConfigurable(arg, "0");
+verifyProperty(arg, "0", {
+  value: 10,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-279.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-279.js
index 69aff91049..a225f9458f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-279.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-279.js
@@ -42,8 +42,9 @@ verifyEqualTo(arg, "0", get_func());
 
 verifyWritable(arg, "0", "setVerifyHelpProp");
 
-verifyEnumerable(arg, "0");
-
-verifyConfigurable(arg, "0");
+verifyProperty(arg, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-28.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-28.js
index 1b1b00f14b..f46733e9b5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-28.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-28.js
@@ -18,14 +18,9 @@ Object.defineProperties(obj, {
   }
 });
 
-verifyNotWritable(obj, "prop");
-
-if (!obj.hasOwnProperty("prop")) {
-  throw new Test262Error('Expected obj.hasOwnProperty("prop") to be true, actually ' + obj.hasOwnProperty("prop"));
-}
-
-if (obj.prop !== 1001) {
-  throw new Test262Error('Expected obj.prop === 1001, actually ' + obj.prop);
-}
+verifyProperty(obj, "prop", {
+  value: 1001,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-281.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-281.js
index 4df7240d9c..87f70353e5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-281.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-281.js
@@ -27,12 +27,11 @@ Object.defineProperties(arg, {
   }
 });
 
-verifyEqualTo(arg, "0", 20);
-
-verifyNotWritable(arg, "0");
-
-verifyNotEnumerable(arg, "0");
-
-verifyNotConfigurable(arg, "0");
+verifyProperty(arg, "0", {
+  value: 20,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-282.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-282.js
index 11d6e36781..10322f5329 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-282.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-282.js
@@ -34,18 +34,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "0", 0);
-
-  verifyNotWritable(arg, "0");
-
-  verifyEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  value: 0,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-283.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-283.js
index 8ac9b4f704..ccdf040553 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-283.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-283.js
@@ -35,18 +35,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "0", 0);
-
-  verifyNotWritable(arg, "0");
-
-  verifyNotEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-284.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-284.js
index 9fed19833a..6a449ac3d9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-284.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-284.js
@@ -35,18 +35,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "0", 0);
-
-  verifyNotWritable(arg, "0");
-
-  verifyEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  value: 0,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-285.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-285.js
index a22f1a59ba..b375ce09a4 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-285.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-285.js
@@ -35,18 +35,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "0", 0);
-
-  verifyNotWritable(arg, "0");
-
-  verifyNotEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-288.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-288.js
index a5a2feeecd..bb2843f668 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-288.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-288.js
@@ -40,14 +40,14 @@ try {
 } catch (e) {
   verifyEqualTo(arg, "0", get_func());
 
-  verifyEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-289.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-289.js
index 58daa19af6..b6ce95181d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-289.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-289.js
@@ -40,14 +40,14 @@ try {
 } catch (e) {
   verifyEqualTo(arg, "0", get_func());
 
-  verifyEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-290.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-290.js
index f03e73674a..0b8e42adfe 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-290.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-290.js
@@ -30,12 +30,11 @@ Object.defineProperties(arg, {
   }
 });
 
-verifyEqualTo(arg, "0", 10);
-
-verifyNotWritable(arg, "0");
-
-verifyNotEnumerable(arg, "0");
-
-verifyNotConfigurable(arg, "0");
+verifyProperty(arg, "0", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-291.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-291.js
index 1319ec70c2..db6f500445 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-291.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-291.js
@@ -42,8 +42,9 @@ verifyEqualTo(arg, "0", get_func());
 
 verifyWritable(arg, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arg, "0");
-
-verifyNotConfigurable(arg, "0");
+verifyProperty(arg, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-292.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-292.js
index a03cfd2060..b46f0bc120 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-292.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-292.js
@@ -43,8 +43,9 @@ Object.defineProperties(arg, {
 
 verifyEqualTo(arg, "0", get_func2());
 
-verifyNotEnumerable(arg, "0");
-
-verifyNotConfigurable(arg, "0");
+verifyProperty(arg, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-293.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-293.js
index 5d9589888b..7267e28935 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-293.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-293.js
@@ -28,12 +28,11 @@ Object.defineProperties(arg, {
   }
 });
 
-verifyEqualTo(arg, "0", 20);
-
-verifyNotWritable(arg, "0");
-
-verifyNotEnumerable(arg, "0");
-
-verifyNotConfigurable(arg, "0");
+verifyProperty(arg, "0", {
+  value: 20,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-294.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-294.js
index e1af163e2b..efa1e26fb6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-294.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-294.js
@@ -34,18 +34,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "0", 0);
-
-  verifyNotWritable(arg, "0");
-
-  verifyNotEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-295.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-295.js
index 995e695b60..e6fc9e9422 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-295.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-295.js
@@ -35,18 +35,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "0", 0);
-
-  verifyNotWritable(arg, "0");
-
-  verifyNotEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-296.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-296.js
index d63b6abd7c..ee14307684 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-296.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-296.js
@@ -35,18 +35,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "0", 0);
-
-  verifyNotWritable(arg, "0");
-
-  verifyEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  value: 0,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-297.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-297.js
index 85a07ad038..d647c69fc9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-297.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-297.js
@@ -35,18 +35,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "0", 0);
-
-  verifyNotWritable(arg, "0");
-
-  verifyNotEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-298.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-298.js
index 2bb794f123..82f75ed8d5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-298.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-298.js
@@ -42,14 +42,14 @@ try {
 } catch (e) {
   verifyEqualTo(arg, "0", get_func1());
 
-  verifyNotEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-299.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-299.js
index 2e59611209..f3cf964f13 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-299.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-299.js
@@ -43,14 +43,14 @@ try {
 } catch (e) {
   verifyEqualTo(arg, "0", get_func());
 
-  verifyNotEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-30.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-30.js
index bba5d89ff4..580dcaf3da 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-30.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-30.js
@@ -19,14 +19,9 @@ Object.defineProperties(obj, {
   }
 });
 
-verifyNotConfigurable(obj, "prop");
-
-if (!obj.hasOwnProperty("prop")) {
-  throw new Test262Error('Expected obj.hasOwnProperty("prop") to be true, actually ' + obj.hasOwnProperty("prop"));
-}
-
-if (obj.prop !== 1001) {
-  throw new Test262Error('Expected obj.prop === 1001, actually ' + obj.prop);
-}
+verifyProperty(obj, "prop", {
+  value: 1001,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-300.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-300.js
index 7c10d4efa7..4eb41d999f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-300.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-300.js
@@ -39,14 +39,14 @@ try {
 } catch (e) {
   verifyEqualTo(arg, "0", get_func());
 
-  verifyEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-301.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-301.js
index 607a3a746d..1dc7c3747d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-301.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-301.js
@@ -39,14 +39,14 @@ try {
 } catch (e) {
   verifyEqualTo(arg, "0", get_func());
 
-  verifyEnumerable(arg, "0");
-
-  verifyNotConfigurable(arg, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "0", {
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-302.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-302.js
index 16f710cd40..3e5bee3cc9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-302.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-302.js
@@ -24,12 +24,11 @@ Object.defineProperties(arg, {
   }
 });
 
-verifyEqualTo(arg, "genericProperty", 1001);
-
-verifyWritable(arg, "genericProperty");
-
-verifyEnumerable(arg, "genericProperty");
-
-verifyConfigurable(arg, "genericProperty");
+verifyProperty(arg, "genericProperty", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-303.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-303.js
index f3f32aab1c..91719ca75f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-303.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-303.js
@@ -35,8 +35,9 @@ verifyEqualTo(arg, "genericProperty", getFun());
 
 verifyWritable(arg, "genericProperty", "testGetFunction");
 
-verifyEnumerable(arg, "genericProperty");
-
-verifyConfigurable(arg, "genericProperty");
+verifyProperty(arg, "genericProperty", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-304.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-304.js
index e5168c7d84..955fc46f5a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-304.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-304.js
@@ -46,8 +46,9 @@ verifyEqualTo(arg, "genericProperty", getFun());
 
 verifyWritable(arg, "genericProperty", "testGetFunction");
 
-verifyNotEnumerable(arg, "genericProperty");
-
-verifyNotConfigurable(arg, "genericProperty");
+verifyProperty(arg, "genericProperty", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-305.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-305.js
index 4863298678..2c8528dee0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-305.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-305.js
@@ -30,12 +30,11 @@ Object.defineProperties(arg, {
   }
 });
 
-verifyEqualTo(arg, "genericProperty", 1002);
-
-verifyWritable(arg, "genericProperty");
-
-verifyNotEnumerable(arg, "genericProperty");
-
-verifyNotConfigurable(arg, "genericProperty");
+verifyProperty(arg, "genericProperty", {
+  value: 1002,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-306.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-306.js
index 5674c28b7d..7fa55bce0e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-306.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-306.js
@@ -30,18 +30,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "genericProperty", 1001);
-
-  verifyNotWritable(arg, "genericProperty");
-
-  verifyNotEnumerable(arg, "genericProperty");
-
-  verifyNotConfigurable(arg, "genericProperty");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "genericProperty", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-307.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-307.js
index f1294cc7e8..7b6840796d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-307.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-307.js
@@ -29,18 +29,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "genericProperty", undefined);
-
-  verifyNotWritable(arg, "genericProperty");
-
-  verifyNotEnumerable(arg, "genericProperty");
-
-  verifyNotConfigurable(arg, "genericProperty");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "genericProperty", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-308.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-308.js
index f905ee306c..49be313a95 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-308.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-308.js
@@ -29,18 +29,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "genericProperty", undefined);
-
-  verifyNotWritable(arg, "genericProperty");
-
-  verifyEnumerable(arg, "genericProperty");
-
-  verifyNotConfigurable(arg, "genericProperty");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "genericProperty", {
+  value: undefined,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-309.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-309.js
index fc7e123d7a..20e70b72df 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-309.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-309.js
@@ -28,18 +28,16 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arg, "genericProperty", undefined);
-
-  verifyNotWritable(arg, "genericProperty");
-
-  verifyNotEnumerable(arg, "genericProperty");
-
-  verifyNotConfigurable(arg, "genericProperty");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "genericProperty", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-31.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-31.js
index 3e0d7399be..1cc9e68036 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-31.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-31.js
@@ -19,12 +19,12 @@ Object.defineProperties(obj, {
     configurable: false
   }
 });
-verifyEqualTo(obj, "prop", 1002);
 
-verifyNotWritable(obj, "prop");
-
-verifyNotEnumerable(obj, "prop");
-
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  value: 1002,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-310.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-310.js
index a62ee445a7..51326cbe7f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-310.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-310.js
@@ -43,14 +43,14 @@ try {
 
   verifyWritable(arg, "genericProperty", "verifySetFun");
 
-  verifyNotEnumerable(arg, "genericProperty");
-
-  verifyNotConfigurable(arg, "genericProperty");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "genericProperty", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-311.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-311.js
index b5fd0b53f7..e43c360b87 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-311.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-311.js
@@ -36,14 +36,14 @@ try {
 } catch (e) {
   verifyWritable(arg, "genericProperty", "genericPropertyString");
 
-  verifyNotEnumerable(arg, "genericProperty");
-
-  verifyNotConfigurable(arg, "genericProperty");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "genericProperty", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-312.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-312.js
index a890c971e3..1612b14adb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-312.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-312.js
@@ -35,14 +35,14 @@ try {
 } catch (e) {
   verifyWritable(arg, "genericProperty", "genericPropertyString");
 
-  verifyEnumerable(arg, "genericProperty");
-
-  verifyNotConfigurable(arg, "genericProperty");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "genericProperty", {
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-313.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-313.js
index 8a0992330e..aa51e97ee2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-313.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-313.js
@@ -34,14 +34,14 @@ try {
 } catch (e) {
   verifyWritable(arg, "genericProperty", "genericPropertyString");
 
-  verifyNotEnumerable(arg, "genericProperty");
-
-  verifyNotConfigurable(arg, "genericProperty");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arg, "genericProperty", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-33.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-33.js
index c1c992a90d..25c528e02d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-33.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-33.js
@@ -24,8 +24,9 @@ Object.defineProperties(obj, {
 });
 verifyWritable(obj, "prop", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "prop");
-
-verifyConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-35.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-35.js
index 5ec06c05ef..394f63ff5f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-35.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-35.js
@@ -29,8 +29,9 @@ verifyEqualTo(obj, "prop", getFun());
 
 verifyWritable(obj, "prop", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "prop");
-
-verifyConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-36.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-36.js
index cd1476eaea..7089f666f5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-36.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-36.js
@@ -30,8 +30,9 @@ verifyEqualTo(obj, "prop", 10);
 
 verifyWritable(obj, "prop", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "prop");
-
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-37.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-37.js
index afdb5a5709..466884a968 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-37.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-37.js
@@ -29,8 +29,9 @@ verifyEqualTo(obj, "prop", getFun());
 
 verifyWritable(obj, "prop", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "prop");
-
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-38-1.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-38-1.js
index 97d92d286c..c5c609ad79 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-38-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-38-1.js
@@ -29,8 +29,9 @@ Object.defineProperties(obj, {
 
 verifyEqualTo(obj, "foo", getFunc());
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-38.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-38.js
index d687d6345e..9bd8a38c7c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-38.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-38.js
@@ -17,12 +17,12 @@ obj.foo = 100; // default value of attributes: writable: true, configurable: tru
 Object.defineProperties(obj, {
   foo: {}
 });
-verifyEqualTo(obj, "foo", 100);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 100,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-39.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-39.js
index 54c402d74f..ff7d19a48f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-39.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-39.js
@@ -22,12 +22,12 @@ Object.defineProperties(obj, {
     configurable: true
   }
 });
-verifyEqualTo(obj, "foo", 101);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 101,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-40.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-40.js
index 6c0d2f2c8a..948a61d092 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-40.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-40.js
@@ -40,8 +40,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-41.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-41.js
index f7d9be5dc4..a41d70fd83 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-41.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-41.js
@@ -19,12 +19,12 @@ Object.defineProperties(obj, {
     value: "102"
   }
 });
-verifyEqualTo(obj, "foo", "102");
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: "102",
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-42.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-42.js
index 26da7ca748..4971c08a34 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-42.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-42.js
@@ -22,12 +22,12 @@ Object.defineProperties(obj, {
     value: undefined
   }
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-43.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-43.js
index f31e75dbed..53be56ca55 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-43.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-43.js
@@ -22,12 +22,12 @@ Object.defineProperties(obj, {
     value: null
   }
 });
-verifyEqualTo(obj, "foo", null);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: null,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-44.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-44.js
index ce699a71b2..895b21043b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-44.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-44.js
@@ -23,8 +23,10 @@ Object.defineProperties(obj, {
   }
 });
 
-verifyNotEnumerable(obj, "foo");
-verifyNotWritable(obj, "foo");
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-45.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-45.js
index 5738385a85..765e5e3226 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-45.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-45.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", -0);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: -0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-46.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-46.js
index 5b7397c87e..3f57029fbc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-46.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-46.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", +0);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: +0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-47.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-47.js
index 3cbc638a8b..871d859a41 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-47.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-47.js
@@ -22,12 +22,12 @@ Object.defineProperties(obj, {
     value: 101
   }
 });
-verifyEqualTo(obj, "foo", 101);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 101,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-48.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-48.js
index b3de13ed9d..eb530fdff3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-48.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-48.js
@@ -19,12 +19,12 @@ Object.defineProperties(obj, {
     value: 102
   }
 });
-verifyEqualTo(obj, "foo", 102);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 102,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-49.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-49.js
index 5cb4ac2df9..73beacbde0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-49.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-49.js
@@ -23,12 +23,12 @@ Object.defineProperties(obj, {
     value: "abcd"
   }
 });
-verifyEqualTo(obj, "foo", "abcd");
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: "abcd",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-5.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-5.js
index 5893ad38d2..1cf2293e27 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-5.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-5.js
@@ -29,16 +29,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "prop", getFunc());
-
-  verifyNotEnumerable(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyEqualTo(obj, "prop", getFunc());
+
+verifyProperty(obj, "prop", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-50.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-50.js
index c4459a802e..2e7473cada 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-50.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-50.js
@@ -19,12 +19,12 @@ Object.defineProperties(obj, {
     value: "fghj"
   }
 });
-verifyEqualTo(obj, "foo", "fghj");
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: "fghj",
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-51.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-51.js
index eaeb92e3c7..cf927bc359 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-51.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-51.js
@@ -22,12 +22,12 @@ Object.defineProperties(obj, {
     value: true
   }
 });
-verifyEqualTo(obj, "foo", true);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: true,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-52.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-52.js
index 294565851e..ad4217d829 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-52.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-52.js
@@ -19,12 +19,12 @@ Object.defineProperties(obj, {
     value: false
   }
 });
-verifyEqualTo(obj, "foo", false);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: false,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-53.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-53.js
index 47a8e4d761..d9a27c8f94 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-53.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-53.js
@@ -25,12 +25,12 @@ Object.defineProperties(obj, {
     value: obj1
   }
 });
-verifyEqualTo(obj, "foo", obj1);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-54.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-54.js
index 0c154f563f..b0fc54d4af 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-54.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-54.js
@@ -26,12 +26,12 @@ Object.defineProperties(obj, {
     value: obj2
   }
 });
-verifyEqualTo(obj, "foo", obj2);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: obj2,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-55.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-55.js
index 3db7ea5160..da79965576 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-55.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-55.js
@@ -22,12 +22,12 @@ Object.defineProperties(obj, {
     writable: false
   }
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-56.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-56.js
index c5e8d07b24..8925a1c6a6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-56.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-56.js
@@ -24,12 +24,12 @@ Object.defineProperties(obj, {
     configurable: true
   }
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-57.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-57.js
index 07a9774921..f257a3fa8a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-57.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-57.js
@@ -26,9 +26,11 @@ Object.defineProperties(obj, {
   }
 });
 
-verifyNotEnumerable(obj, "foo");
 assert.sameValue(obj.foo, 10);
 
-verifyNotConfigurable(obj, "foo")
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-58.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-58.js
index c774825fb6..2bdb06848a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-58.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-58.js
@@ -6,6 +6,7 @@ es5id: 15.2.3.7-6-a-58
 description: >
     Object.defineProperties - desc.[[Get]] and P.[[Get]] are two
     objects which refer to the different objects (8.12.9 step 6)
+includes: [propertyHelper.js]
 ---*/
 
 var obj = {};
@@ -29,25 +30,15 @@ Object.defineProperties(obj, {
   }
 });
 
-var verifyEnumerable = false;
-for (var p in obj) {
-  if (p === "foo") {
-    verifyEnumerable = true;
-  }
-}
-
-var verifyValue = false;
-verifyValue = (obj.foo === 20);
+assert.sameValue(obj.foo, 20);
 
 var desc = Object.getOwnPropertyDescriptor(obj, "foo");
 
-var verifyConfigurable = false;
-delete obj.foo;
-verifyConfigurable = obj.hasOwnProperty("foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
-assert.sameValue(verifyConfigurable, false, 'verifyConfigurable');
-assert.sameValue(verifyEnumerable, false, 'verifyEnumerable');
-assert(verifyValue, 'verifyValue !== true');
 assert.sameValue(typeof(desc.set), "undefined", 'typeof (desc.set)');
 assert.sameValue(desc.get, get_Func2, 'desc.get');
 
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-59.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-59.js
index 55f0b6e98b..c6ef06f2f7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-59.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-59.js
@@ -27,8 +27,9 @@ Object.defineProperties(obj, {
 });
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-60.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-60.js
index 18b3b08eff..654371c09d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-60.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-60.js
@@ -30,8 +30,9 @@ Object.defineProperties(obj, {
 });
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-61.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-61.js
index d6b97792f2..7bca98d769 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-61.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-61.js
@@ -22,12 +22,12 @@ Object.defineProperties(obj, {
     enumerable: false
   }
 });
-verifyEqualTo(obj, "foo", 10);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-62.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-62.js
index 66707f734d..5e8478764f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-62.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-62.js
@@ -23,12 +23,12 @@ Object.defineProperties(obj, {
     enumerable: true
   }
 });
-verifyEqualTo(obj, "foo", 10);
 
-verifyNotWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-63.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-63.js
index d6bfa302ff..c88d34a3d9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-63.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-63.js
@@ -23,12 +23,12 @@ Object.defineProperties(obj, {
     configurable: false
   }
 });
-verifyEqualTo(obj, "foo", 10);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-64.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-64.js
index fe97b64dd8..a2666ea4d3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-64.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-64.js
@@ -22,12 +22,12 @@ Object.defineProperties(obj, {
     configurable: false
   }
 });
-verifyEqualTo(obj, "foo", 10);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-65.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-65.js
index c6678316fc..47811b7582 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-65.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-65.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", 10);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-66-1.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-66-1.js
index dd97034520..ddabfa6957 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-66-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-66-1.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", 10);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-66.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-66.js
index 6c1a70521e..7bbc90ac6e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-66.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-66.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", 10);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-67.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-67.js
index 3980343982..3967859349 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-67.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-67.js
@@ -31,11 +31,13 @@ try {
   throw new Test262Error("Expected TypeError");
 } catch (e) {
   assert(e instanceof TypeError);
-  verifyNotEnumerable(obj, "foo");
 
   assert.sameValue(obj.foo, 10);
 
-  verifyNotConfigurable(obj, "foo");
+  verifyProperty(obj, "foo", {
+    enumerable: false,
+    configurable: false,
+  });
 
   var desc = Object.getOwnPropertyDescriptor(obj, "foo");
 
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-68.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-68.js
index c2581e46bf..db5ed622cd 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-68.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-68.js
@@ -30,18 +30,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", 10);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-69.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-69.js
index 16f5527999..d94a669dd0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-69.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-69.js
@@ -6,6 +6,7 @@ es5id: 15.2.3.7-6-a-69
 description: >
     Object.defineProperties - 'P' is data property and P.configurable
     is true, desc is accessor property (8.12.9 step 9.b.i)
+includes: [propertyHelper.js]
 ---*/
 
 var obj = {};
@@ -25,25 +26,15 @@ Object.defineProperties(obj, {
   }
 });
 
-var verifyEnumerable = false;
-for (var p in obj) {
-  if (p === "foo") {
-    verifyEnumerable = true;
-  }
-}
-
-var verifyValue = false;
-verifyValue = (obj.foo === 20);
+assert.sameValue(obj.foo, 20);
 
 var desc = Object.getOwnPropertyDescriptor(obj, "foo");
 
-var verifyConfigurable = true;
-delete obj.foo;
-verifyConfigurable = obj.hasOwnProperty("foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
-assert.sameValue(verifyConfigurable, false, 'verifyConfigurable');
-assert.sameValue(verifyEnumerable, false, 'verifyEnumerable');
-assert(verifyValue, 'verifyValue !== true');
 assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
 assert.sameValue(desc.get, get_Func, 'desc.get');
 
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-70.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-70.js
index 2c19545d04..311d85dc1e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-70.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-70.js
@@ -27,12 +27,12 @@ Object.defineProperties(obj, {
     value: 12
   }
 });
-verifyEqualTo(obj, "foo", 12);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-71.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-71.js
index 6be29229ee..85d1d8192e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-71.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-71.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", 10);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-72.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-72.js
index 3807bf9155..8db43b2aa2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-72.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-72.js
@@ -28,18 +28,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", 10);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-73.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-73.js
index ec98b17976..4027fc5b41 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-73.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-73.js
@@ -24,12 +24,12 @@ Object.defineProperties(obj, {
     value: undefined
   }
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-74.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-74.js
index 7efeaf287a..8bbcdbb240 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-74.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-74.js
@@ -24,12 +24,12 @@ Object.defineProperties(obj, {
     value: null
   }
 });
-verifyEqualTo(obj, "foo", null);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: null,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-75.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-75.js
index a1fe2653ec..b734bd9f6f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-75.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-75.js
@@ -26,8 +26,10 @@ Object.defineProperties(obj, {
   }
 });
 
-verifyNotEnumerable(obj, "foo");
-verifyNotWritable(obj, "foo");
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-76.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-76.js
index 1a1c1e02c0..6b6cddb15b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-76.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-76.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", -0);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: -0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-77.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-77.js
index 4be63a9fc3..f444cbee00 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-77.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-77.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", +0);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: +0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-78.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-78.js
index 2752971e2e..fce755d9ea 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-78.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-78.js
@@ -24,12 +24,12 @@ Object.defineProperties(obj, {
     value: 100
   }
 });
-verifyEqualTo(obj, "foo", 100);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 100,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-79.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-79.js
index a6533a918c..b0cddcd66f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-79.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-79.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", 10);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-80.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-80.js
index a7b91fa17b..bf1780dd56 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-80.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-80.js
@@ -24,12 +24,12 @@ Object.defineProperties(obj, {
     value: "abcd"
   }
 });
-verifyEqualTo(obj, "foo", "abcd");
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: "abcd",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-81.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-81.js
index a8b094a8e0..edc253f300 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-81.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-81.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", "abcd");
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: "abcd",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-82.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-82.js
index e5d26c4acd..3d8b01d752 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-82.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-82.js
@@ -25,12 +25,12 @@ Object.defineProperties(obj, {
     value: false
   }
 });
-verifyEqualTo(obj, "foo", false);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: false,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-83.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-83.js
index 7e69ae863b..28625eebf8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-83.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-83.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", false);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: false,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-84-1.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-84-1.js
index 19c54b3883..b4f1985956 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-84-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-84-1.js
@@ -32,12 +32,12 @@ Object.defineProperties(obj, {
     value: obj2
   }
 });
-verifyEqualTo(obj, "foo", obj1);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-84.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-84.js
index 0edfc761a9..873bfc248a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-84.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-84.js
@@ -29,12 +29,12 @@ Object.defineProperties(obj, {
     value: obj1
   }
 });
-verifyEqualTo(obj, "foo", obj1);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-85.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-85.js
index f9b41a56a4..10e7399cf1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-85.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-85.js
@@ -35,18 +35,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", obj1);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-86-1.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-86-1.js
index 500986c18d..7b10abcdc2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-86-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-86-1.js
@@ -34,16 +34,16 @@ try {
     }
   });
 } catch (e) {
-  verifyWritable(obj, "foo", "setVerifyHelpProp");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-86.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-86.js
index a6f109dabd..b1ebcbc4dd 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-86.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-86.js
@@ -29,8 +29,10 @@ Object.defineProperties(obj, {
 });
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
-verifyNotConfigurable(obj, "foo");
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-87.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-87.js
index f1cee12ac7..b4e642bcdc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-87.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-87.js
@@ -32,16 +32,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyWritable(obj, "foo", "setVerifyHelpProp");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-88.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-88.js
index 12de5bbe14..5534a858b6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-88.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-88.js
@@ -34,20 +34,20 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-  var desc = Object.getOwnPropertyDescriptor(obj, "foo");
-
-  if (typeof(desc.set) !== "undefined") {
-    throw new Test262Error('Expected typeof (desc.set) === "undefined", actually ' + typeof(desc.set));
-  }
-
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
+}
+
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "foo");
 
+if (typeof(desc.set) !== "undefined") {
+  throw new Test262Error('Expected typeof (desc.set) === "undefined", actually ' + typeof(desc.set));
 }
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-89.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-89.js
index ae7c1d6aa4..f8cf6dc904 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-89.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-89.js
@@ -30,9 +30,10 @@ Object.defineProperties(obj, {
   }
 });
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 var desc = Object.getOwnPropertyDescriptor(obj, "foo");
 
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-90.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-90.js
index 4a7b37c5b0..a6c7d008c1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-90.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-90.js
@@ -37,8 +37,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-91.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-91.js
index 77f1b0a61c..94a43927be 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-91.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-91.js
@@ -44,14 +44,14 @@ try {
 
   verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-92.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-92.js
index 8a79bf19b1..f17c0e9826 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-92.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-92.js
@@ -38,14 +38,14 @@ try {
 } catch (e) {
   verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-1.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-1.js
index 14f8f294c5..702cfc7abd 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-1.js
@@ -38,25 +38,23 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "property", 1002);
-
-  verifyNotWritable(obj, "property");
-
-  verifyNotEnumerable(obj, "property");
-
-  verifyConfigurable(obj, "property");
-  verifyEqualTo(obj, "property1", 1003);
-
-  verifyNotWritable(obj, "property1");
-
-  verifyNotEnumerable(obj, "property1");
-
-  verifyNotConfigurable(obj, "property1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "property", {
+  value: 1002,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+verifyProperty(obj, "property1", {
+  value: 1003,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-2.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-2.js
index 3426413f72..c3651d96a6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-2.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-2.js
@@ -38,25 +38,23 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "0", 1002);
-
-  verifyNotWritable(obj, "0");
-
-  verifyNotEnumerable(obj, "0");
-
-  verifyConfigurable(obj, "0");
-  verifyEqualTo(obj, "1", 1003);
-
-  verifyNotWritable(obj, "1");
-
-  verifyNotEnumerable(obj, "1");
-
-  verifyNotConfigurable(obj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "0", {
+  value: 1002,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+verifyProperty(obj, "1", {
+  value: 1003,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-3.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-3.js
index 927d25a004..9ae84e271d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-3.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-3.js
@@ -37,26 +37,23 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "property", 1001);
-
-  verifyNotWritable(obj, "property");
-
-  verifyNotEnumerable(obj, "property");
-
-  verifyNotConfigurable(obj, "property");
-
-  verifyEqualTo(obj, "property1", 1003);
-
-  verifyNotWritable(obj, "property1");
-
-  verifyNotEnumerable(obj, "property1");
-
-  verifyConfigurable(obj, "property1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "property", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
+verifyProperty(obj, "property1", {
+  value: 1003,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-4.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-4.js
index 7d6548ea1d..53ff196de0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-4.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93-4.js
@@ -37,25 +37,23 @@ try {
 
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "0", 1001);
-
-  verifyNotWritable(obj, "0");
-
-  verifyNotEnumerable(obj, "0");
-
-  verifyNotConfigurable(obj, "0");
-  verifyEqualTo(obj, "1", 1003);
-
-  verifyNotWritable(obj, "1");
-
-  verifyNotEnumerable(obj, "1");
-
-  verifyConfigurable(obj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "0", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
+verifyProperty(obj, "1", {
+  value: 1003,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93.js
index cbfc06a190..3c53e641cc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-93.js
@@ -31,8 +31,9 @@ Object.defineProperties(obj, {
 });
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-94.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-94.js
index 8f97c40e12..7eeef1842b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-94.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-94.js
@@ -19,12 +19,12 @@ Object.defineProperties(obj, {
     value: 200
   }
 });
-verifyEqualTo(obj, "foo", 200);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 200,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-95.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-95.js
index b89ec12636..fed250c3a3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-95.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-95.js
@@ -24,12 +24,12 @@ Object.defineProperties(obj, {
     value: undefined
   }
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-96.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-96.js
index cecec30eb2..06d55a0c5f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-96.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-96.js
@@ -24,12 +24,12 @@ Object.defineProperties(obj, {
     value: 200
   }
 });
-verifyEqualTo(obj, "foo", 200);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 200,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-97.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-97.js
index 830402f265..23461d6227 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-97.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-97.js
@@ -24,12 +24,12 @@ Object.defineProperties(obj, {
     writable: true
   }
 });
-verifyEqualTo(obj, "foo", 100);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 100,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-98.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-98.js
index c45c0b3582..938e2a7b17 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-98.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-98.js
@@ -24,12 +24,12 @@ Object.defineProperties(obj, {
     enumerable: true
   }
 });
-verifyEqualTo(obj, "foo", 200);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 200,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-99.js b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-99.js
index 8dee2771e6..a91c0ab91f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-99.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/15.2.3.7-6-a-99.js
@@ -24,12 +24,12 @@ Object.defineProperties(obj, {
     configurable: false
   }
 });
-verifyEqualTo(obj, "foo", 200);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 200,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/name.js b/js/src/tests/test262/built-ins/Object/defineProperties/name.js
index 64e4c0c4c2..2a9d5c9fbe 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/name.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.defineProperties.name, "defineProperties");
-
-verifyNotEnumerable(Object.defineProperties, "name");
-verifyNotWritable(Object.defineProperties, "name");
-verifyConfigurable(Object.defineProperties, "name");
+verifyProperty(Object.defineProperties, "name", {
+  value: "defineProperties",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperties/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/defineProperties/not-a-constructor.js
index 7987b575ff..151dd2d509 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperties/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperties/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.defineProperties({}, {});
-}, '`new Object.defineProperties({}, {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-100.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-100.js
index de37bdae68..0f9b56f06d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-100.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-100.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   configurable: null
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-102.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-102.js
index a0abf592c3..9352cdf328 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-102.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-102.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-103.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-103.js
index c9b59463af..e25a7ab12b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-103.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-103.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   configurable: 0
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-104.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-104.js
index 9ae7f58e48..ac87f08e86 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-104.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-104.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   configurable: +0
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-105.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-105.js
index 3055a6ff9f..ccff0ebded 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-105.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-105.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   configurable: -0
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-106.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-106.js
index c6a037f9a6..5c024dd411 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-106.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-106.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   configurable: NaN
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-109.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-109.js
index 575c4c9459..f433030ddf 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-109.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-109.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   configurable: ""
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-152.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-152.js
index 87913b2d2d..61d481e7e8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-152.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-152.js
@@ -17,8 +17,9 @@ var attr = {
 
 Object.defineProperty(obj, "property", attr);
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-153.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-153.js
index 20c3e5c191..9f2c747347 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-153.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-153.js
@@ -17,7 +17,8 @@ var attr = {
 
 Object.defineProperty(obj, "property", attr);
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-162.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-162.js
index 088bb9d5d2..79882c4f16 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-162.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-162.js
@@ -18,7 +18,8 @@ Object.defineProperty(attr, "writable", {
 
 Object.defineProperty(obj, "property", attr);
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-163.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-163.js
index bfd2ff3dfb..80b482d4f3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-163.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-163.js
@@ -29,7 +29,8 @@ Object.defineProperty(child, "writable", {
 
 Object.defineProperty(obj, "property", child);
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-164.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-164.js
index 61fe9a5583..2f270d9b9d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-164.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-164.js
@@ -24,7 +24,8 @@ var child = new ConstructFun();
 
 Object.defineProperty(obj, "property", child);
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-171-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-171-1.js
index d8ee8da884..feffeefe59 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-171-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-171-1.js
@@ -17,8 +17,10 @@ try {
   var dateObj = new Date();
 
   Object.defineProperty(obj, "property", dateObj);
-  verifyWritable(obj, "property");
 
+  verifyProperty(obj, "property", {
+    writable: true,
+  });
 } finally {
   delete Date.prototype.writable;
 }
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-178.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-178.js
index 42ab36b422..9069d503ad 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-178.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-178.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   writable: undefined
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-179.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-179.js
index be0fca785e..c4082a47cc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-179.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-179.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   writable: null
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-181.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-181.js
index 04a60062e3..1f47b6b09e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-181.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-181.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   writable: false
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-182.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-182.js
index e1506931c8..b38cc2d799 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-182.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-182.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   writable: 0
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-183.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-183.js
index 08b46c555a..762d8861bd 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-183.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-183.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   writable: +0
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-184.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-184.js
index d456fbeb38..dca54d121b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-184.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-184.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   writable: -0
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-185.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-185.js
index 81061f91f0..d51323620d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-185.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-185.js
@@ -15,10 +15,9 @@ Object.defineProperty(obj, "property", {
   writable: NaN
 });
 
-assert(obj.hasOwnProperty("property"));
-
-verifyNotWritable(obj, "property");
-
-assert.sameValue(typeof(obj.property), "undefined");
+verifyProperty(obj, "property", {
+  value: undefined,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-188.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-188.js
index 29e6a06d42..554b370535 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-188.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-188.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   writable: ""
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotWritable(obj, "property");
+verifyProperty(obj, "property", {
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-73.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-73.js
index 965fa44537..816b74380c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-73.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-73.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-74.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-74.js
index 443d61a4a7..5a2d1d8b46 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-74.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-74.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   value: 100
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-76.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-76.js
index 076c86ede5..70bbe20368 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-76.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-76.js
@@ -22,12 +22,9 @@ var child = new ConstructFun();
 
 Object.defineProperty(obj, "property", child);
 
-assert(obj.hasOwnProperty("property"));
-
-verifyNotConfigurable(obj, "property");
-
-assert(obj.hasOwnProperty("property"));
-
-assert.sameValue(typeof(obj.property), "undefined");
+verifyProperty(obj, "property", {
+  value: undefined,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-83.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-83.js
index 1ab0672165..e08a8f1e06 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-83.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-83.js
@@ -18,7 +18,8 @@ Object.defineProperty(attr, "configurable", {
 
 Object.defineProperty(obj, "property", attr);
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-84.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-84.js
index 2361aa0708..a5be67bd6f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-84.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-84.js
@@ -29,7 +29,8 @@ Object.defineProperty(child, "configurable", {
 
 Object.defineProperty(obj, "property", child);
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-85.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-85.js
index 0b0868625f..cab6d919d0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-85.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-85.js
@@ -24,11 +24,10 @@ var child = new ConstructFun();
 
 Object.defineProperty(obj, "property", child);
 
-assert(obj.hasOwnProperty("property"));
-
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
-assert(obj.hasOwnProperty("property"));
 assert.sameValue(typeof(obj.property), "undefined");
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-99.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-99.js
index aabe445bef..2e46f03642 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-99.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-99.js
@@ -15,7 +15,8 @@ Object.defineProperty(obj, "property", {
   configurable: undefined
 });
 
-assert(obj.hasOwnProperty("property"));
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-100.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-100.js
index 34c2f090cd..4e92039f13 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-100.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-100.js
@@ -16,12 +16,12 @@ obj.foo = 100; // default value of attributes: writable: true, configurable: tru
 Object.defineProperty(obj, "foo", {
   value: 200
 });
-verifyEqualTo(obj, "foo", 200);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 200,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-101.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-101.js
index 1da7826cf5..3dc30d6ed0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-101.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-101.js
@@ -16,12 +16,12 @@ obj.foo = 100; // default value of attributes: writable: true, configurable: tru
 Object.defineProperty(obj, "foo", {
   value: undefined
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-102.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-102.js
index 33d84c9f53..06fc9a4887 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-102.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-102.js
@@ -16,12 +16,12 @@ obj.foo = undefined; // default value of attributes: writable: true, configurabl
 Object.defineProperty(obj, "foo", {
   value: 100
 });
-verifyEqualTo(obj, "foo", 100);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 100,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-103.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-103.js
index b98b2837f7..b179185952 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-103.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-103.js
@@ -20,12 +20,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   writable: true
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-104.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-104.js
index 28de47218b..5ec8732e23 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-104.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-104.js
@@ -20,12 +20,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   enumerable: true
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-105.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-105.js
index d1c51afdd3..9da65ba390 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-105.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-105.js
@@ -23,12 +23,11 @@ Object.defineProperty(obj, "foo", {
   configurable: false
 });
 
-verifyEqualTo(obj, "foo", 200);
-
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 200,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-106.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-106.js
index 9d726fe9c3..d4897eb29c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-106.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-106.js
@@ -24,12 +24,12 @@ Object.defineProperty(obj, "foo", {
   writable: false,
   enumerable: false
 });
-verifyEqualTo(obj, "foo", 200);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 200,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-107.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-107.js
index 949c297366..9c66006422 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-107.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-107.js
@@ -38,8 +38,9 @@ verifyEqualTo(obj, "foo", getFunc2());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-108.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-108.js
index c9f5864973..58e2152dc6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-108.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-108.js
@@ -34,8 +34,9 @@ Object.defineProperty(obj, "foo", {
 });
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-109.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-109.js
index 8093ffd718..fa2d599742 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-109.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-109.js
@@ -34,8 +34,9 @@ verifyEqualTo(obj, "foo", getFunc());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-110.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-110.js
index c94fbc8af0..bfbf658e9f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-110.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-110.js
@@ -32,8 +32,9 @@ Object.defineProperty(obj, "foo", {
 });
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-112.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-112.js
index 4a80f6b084..662a1cbdca 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-112.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-112.js
@@ -35,8 +35,9 @@ verifyEqualTo(obj, "foo", getFunc());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-113.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-113.js
index 48e4fa7f6d..bce7c0d28e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-113.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-113.js
@@ -30,8 +30,9 @@ Object.defineProperty(obj, "foo", {
 
 verifyEqualTo(obj, "foo", getFunc());
 
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-114.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-114.js
index a0a8bc367d..a8c2631ca3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-114.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-114.js
@@ -35,8 +35,9 @@ verifyEqualTo(obj, "foo", getFunc());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-115.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-115.js
index 5481206420..6137b1d684 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-115.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-115.js
@@ -42,8 +42,9 @@ verifyEqualTo(obj, "foo", getFunc2());
 
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-118.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-118.js
index 47a6508761..4407e43422 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-118.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-118.js
@@ -16,8 +16,11 @@ Object.defineProperty(arrObj, "length", {});
 
 assert.sameValue(arrObj.length, 0);
 arrObj.length = 2;
-assert.sameValue(arrObj.length, 2);
-verifyNotEnumerable(arrObj, "length");
-verifyNotConfigurable(arrObj, "length");
+
+verifyProperty(arrObj, "length", {
+  value: 2,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-119.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-119.js
index 0c07b625e0..5f50d645dc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-119.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-119.js
@@ -21,8 +21,11 @@ Object.defineProperty(arrObj, "length", {
 
 assert.sameValue(arrObj.length, 0);
 arrObj.length = 2;
-assert.sameValue(arrObj.length, 2);
-verifyNotEnumerable(arrObj, "length");
-verifyNotConfigurable(arrObj, "length");
+
+verifyProperty(arrObj, "length", {
+  value: 2,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-124.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-124.js
index 1dce4ea87c..ba58d7b69b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-124.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-124.js
@@ -16,12 +16,12 @@ var arrObj = [];
 Object.defineProperty(arrObj, "length", {
   writable: false
 });
-verifyEqualTo(arrObj, "length", 0);
 
-verifyNotWritable(arrObj, "length");
-
-verifyNotEnumerable(arrObj, "length");
-
-verifyNotConfigurable(arrObj, "length");
+verifyProperty(arrObj, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-167.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-167.js
index 8c51484bd1..a611ceaf40 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-167.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-167.js
@@ -22,7 +22,10 @@ Object.defineProperty(arrObj, "length", {
 });
 
 assert(!arrObj.hasOwnProperty("1"))
-assert.sameValue(arrObj.length, 1);
-verifyNotWritable(arrObj, "length");
+
+verifyProperty(arrObj, "length", {
+  value: 1,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-181.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-181.js
index 26f0e3e3cd..9b8881341b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-181.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-181.js
@@ -21,9 +21,11 @@ Object.defineProperty(arrObj, "length", {
   writable: false
 });
 
-verifyNotWritable(arrObj, "length");
-
 assert(!arrObj.hasOwnProperty("1"));
-assert.sameValue(arrObj.length, 0);
+
+verifyProperty(arrObj, "length", {
+  value: 0,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-190.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-190.js
index e9f7f17e6a..06d0f71da5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-190.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-190.js
@@ -24,17 +24,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "0", "ownDataProperty");
-
-  verifyNotWritable(arrObj, "0");
-
-  verifyNotEnumerable(arrObj, "0");
-
-  verifyNotConfigurable(arrObj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
 }
 
+verifyProperty(arrObj, "0", {
+  value: "ownDataProperty",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-194.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-194.js
index c69f78bdbc..f1172f8810 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-194.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-194.js
@@ -29,14 +29,14 @@ try {
 } catch (e) {
   verifyEqualTo(arrObj, "0", getFunc());
 
-  verifyNotEnumerable(arrObj, "0");
-
-  verifyNotConfigurable(arrObj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e.name);
   }
-
 }
 
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-195.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-195.js
index 56e50846b6..ff0dd05fa3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-195.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-195.js
@@ -41,9 +41,10 @@ try {
 
   verifyWritable(arrObj, "0", "helpVerifySet");
 
-  verifyNotEnumerable(arrObj, "0");
-
-  verifyNotConfigurable(arrObj, "0");
+  verifyProperty(arrObj, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 } finally {
   delete Array.prototype[0];
 }
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-199.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-199.js
index 98cefd1ded..80cbce9a39 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-199.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-199.js
@@ -17,12 +17,11 @@ Object.defineProperty(arrObj, "0", {
   enumerable: true
 });
 
-verifyEqualTo(arrObj, "0", undefined);
-
-verifyNotWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-200.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-200.js
index 2c0632c716..b727dfd394 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-200.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-200.js
@@ -20,12 +20,11 @@ Object.defineProperty(arrObj, "0", {
   configurable: false
 });
 
-verifyEqualTo(arrObj, "0", undefined);
-
-verifyWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: undefined,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-201.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-201.js
index ab771a71c0..67e5615699 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-201.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-201.js
@@ -19,12 +19,12 @@ Object.defineProperty(arrObj, "0", {
   enumerable: true,
   configurable: false
 });
-verifyEqualTo(arrObj, "0", 1001);
 
-verifyNotWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 1001,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-202.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-202.js
index f6fe819199..bb074efafc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-202.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-202.js
@@ -19,12 +19,12 @@ Object.defineProperty(arrObj, "0", {
   writable: true,
   configurable: true
 });
-verifyEqualTo(arrObj, "0", 1001);
 
-verifyWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-203.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-203.js
index 9e6cad35fb..49840159a2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-203.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-203.js
@@ -19,12 +19,12 @@ Object.defineProperty(arrObj, "0", {
   writable: true,
   enumerable: true
 });
-verifyEqualTo(arrObj, "0", 1001);
 
-verifyWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-204.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-204.js
index b513a1dbb9..49c684f429 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-204.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-204.js
@@ -19,12 +19,11 @@ Object.defineProperty(arrObj, "0", {
   configurable: false
 });
 
-verifyEqualTo(arrObj, "0", 1001);
-
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-205.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-205.js
index 72e179ef74..13a6128fa3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-205.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-205.js
@@ -24,8 +24,9 @@ Object.defineProperty(arrObj, "0", {
 
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-207.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-207.js
index 966b1744bd..72501910fb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-207.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-207.js
@@ -28,8 +28,9 @@ verifyEqualTo(arrObj, "0", getFunc());
 
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-208.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-208.js
index ba15c84b8e..be88bcd111 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-208.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-208.js
@@ -27,8 +27,9 @@ verifyEqualTo(arrObj, "0", getFunc());
 
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-209.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-209.js
index cdefdc539e..6a6284615f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-209.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-209.js
@@ -38,8 +38,9 @@ verifyEqualTo(arrObj, "0", getFunc());
 
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-210.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-210.js
index 3d5614db18..d94a0e32c2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-210.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-210.js
@@ -15,12 +15,12 @@ var arrObj = [];
 arrObj[0] = 101; // default value of attributes: writable: true, configurable: true, enumerable: true
 
 Object.defineProperty(arrObj, "0", {});
-verifyEqualTo(arrObj, "0", 101);
 
-verifyWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 101,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-211.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-211.js
index 74773a8b8c..963370db23 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-211.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-211.js
@@ -32,8 +32,9 @@ verifyEqualTo(arrObj, "0", getFunc());
 
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-212.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-212.js
index 60a73af96b..ac275e4b75 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-212.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-212.js
@@ -22,12 +22,11 @@ Object.defineProperty(arrObj, "0", {
   configurable: true
 });
 
-verifyEqualTo(arrObj, "0", 100);
-
-verifyWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 100,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-213.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-213.js
index aba7e1fb85..9af3a4f98e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-213.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-213.js
@@ -39,8 +39,9 @@ verifyEqualTo(arrObj, "0", getFunc());
 
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-214.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-214.js
index a68119a095..95c97dc221 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-214.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-214.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "0", 101);
-
-  verifyNotWritable(arrObj, "0");
-
-  verifyNotEnumerable(arrObj, "0");
-
-  verifyNotConfigurable(arrObj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "0", {
+  value: 101,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-215.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-215.js
index f6fccd3a61..84af6b3d29 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-215.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-215.js
@@ -19,12 +19,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   value: undefined
 });
-verifyEqualTo(arrObj, "0", undefined);
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-216.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-216.js
index ac7099d2bd..fd58d43e5c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-216.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-216.js
@@ -19,12 +19,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   value: null
 });
-verifyEqualTo(arrObj, "0", null);
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: null,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-217.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-217.js
index 3b9df95a20..b539dc5c9d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-217.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-217.js
@@ -20,11 +20,11 @@ Object.defineProperty(arrObj, "0", {
   value: NaN
 });
 
-assert(arrObj.hasOwnProperty("0"));
-assert(arrObj[0] !== arrObj[0]);
-
-verifyNotWritable(arrObj, "0");
-verifyNotEnumerable(arrObj, "0");
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: NaN,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-218.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-218.js
index f9e2e8c567..4f1697f07b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-218.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-218.js
@@ -23,18 +23,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "0", -0);
-
-  verifyNotWritable(arrObj, "0");
-
-  verifyNotEnumerable(arrObj, "0");
-
-  verifyNotConfigurable(arrObj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "0", {
+  value: -0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-219.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-219.js
index 627a70f3ac..ef0742dce5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-219.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-219.js
@@ -23,18 +23,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "0", +0);
-
-  verifyNotWritable(arrObj, "0");
-
-  verifyNotEnumerable(arrObj, "0");
-
-  verifyNotConfigurable(arrObj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "0", {
+  value: +0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-220.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-220.js
index 1e3d4a2d4c..a890330b36 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-220.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-220.js
@@ -20,12 +20,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   value: 101
 });
-verifyEqualTo(arrObj, "0", 101);
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 101,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-221.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-221.js
index 00732ff7be..441feff1b9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-221.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-221.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "0", 101);
-
-  verifyNotWritable(arrObj, "0");
-
-  verifyNotEnumerable(arrObj, "0");
-
-  verifyNotConfigurable(arrObj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "0", {
+  value: 101,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-222.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-222.js
index 88d73c0af9..93d15fbf4f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-222.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-222.js
@@ -20,12 +20,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   value: "abcd"
 });
-verifyEqualTo(arrObj, "0", "abcd");
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: "abcd",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-223.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-223.js
index 7177f6a39a..b39670d94c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-223.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-223.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "0", "abcd");
-
-  verifyNotWritable(arrObj, "0");
-
-  verifyNotEnumerable(arrObj, "0");
-
-  verifyNotConfigurable(arrObj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "0", {
+  value: "abcd",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-224.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-224.js
index 91cac8ffdc..01c57e38f7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-224.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-224.js
@@ -20,12 +20,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   value: true
 });
-verifyEqualTo(arrObj, "0", true);
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: true,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-225.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-225.js
index 28d8f74f8e..29b344eb75 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-225.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-225.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "0", true);
-
-  verifyNotWritable(arrObj, "0");
-
-  verifyNotEnumerable(arrObj, "0");
-
-  verifyNotConfigurable(arrObj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "0", {
+  value: true,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-226.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-226.js
index d766b26449..1b02ed6bbb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-226.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-226.js
@@ -24,12 +24,13 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   value: obj1
 });
-verifyEqualTo(arrObj, "0", obj1);
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
-verifyNotConfigurable(arrObj, "0");
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-227.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-227.js
index 1834373563..a01f415dac 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-227.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-227.js
@@ -32,18 +32,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "0", obj1);
-
-  verifyNotWritable(arrObj, "0");
-
-  verifyNotEnumerable(arrObj, "0");
-
-  verifyNotConfigurable(arrObj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "0", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-228.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-228.js
index 9316e59db2..c6a7bea532 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-228.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-228.js
@@ -20,12 +20,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   writable: false
 });
-verifyEqualTo(arrObj, "0", undefined);
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-229.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-229.js
index e1dead5a60..7dc8b36836 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-229.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-229.js
@@ -21,12 +21,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   writable: true
 });
-verifyEqualTo(arrObj, "0", undefined);
 
-verifyWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: undefined,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-230.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-230.js
index 61d0187d81..44305782dc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-230.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-230.js
@@ -34,8 +34,9 @@ verifyEqualTo(arrObj, "0", getFunc());
 
 verifyWritable(arrObj, "0", "helpVerifySet");
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-231.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-231.js
index 40199bd209..9180a48ff8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-231.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-231.js
@@ -40,8 +40,9 @@ verifyEqualTo(arrObj, "0", getFunc2());
 
 verifyWritable(arrObj, "0", "helpVerifySet");
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-232.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-232.js
index d22adbe6f1..b61f732589 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-232.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-232.js
@@ -26,8 +26,9 @@ Object.defineProperty(arrObj, "0", {
 });
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-233.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-233.js
index bd2f68977e..137485c1eb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-233.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-233.js
@@ -29,8 +29,9 @@ Object.defineProperty(arrObj, "0", {
 });
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-234.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-234.js
index b67690ecd5..056b76e72c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-234.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-234.js
@@ -20,12 +20,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   enumerable: false
 });
-verifyEqualTo(arrObj, "0", undefined);
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-235.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-235.js
index d10baaf8d4..6d46f6e47f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-235.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-235.js
@@ -21,12 +21,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   enumerable: true
 });
-verifyEqualTo(arrObj, "0", undefined);
 
-verifyNotWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-236.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-236.js
index b7df65b72a..d403262794 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-236.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-236.js
@@ -20,12 +20,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   configurable: false
 });
-verifyEqualTo(arrObj, "0", undefined);
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-237.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-237.js
index 59d2e8c84e..291c075755 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-237.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-237.js
@@ -20,12 +20,12 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   configurable: false
 });
-verifyEqualTo(arrObj, "0", undefined);
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-238.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-238.js
index 9708bd0766..2afbac121c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-238.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-238.js
@@ -27,20 +27,17 @@ try {
     configurable: true
   });
   throw new Test262Error("Expected an exception.");
-
 } catch (e) {
-  verifyEqualTo(arrObj, "1", 3);
-
-  verifyWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: 3,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-239.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-239.js
index 16a8aa0b1a..3036c00095 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-239.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-239.js
@@ -29,20 +29,17 @@ try {
     enumerable: true
   });
   throw new Test262Error("Expected an exception.");
-
 } catch (e) {
-  verifyEqualTo(arrObj, "1", 3);
-
-  verifyWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: 3,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-240.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-240.js
index e74b2479d3..7c3712b1e3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-240.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-240.js
@@ -32,14 +32,14 @@ try {
 } catch (e) {
   verifyWritable(arrObj, "1", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-241.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-241.js
index 8923abc966..6447fcad04 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-241.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-241.js
@@ -24,20 +24,17 @@ try {
     set: function() {}
   });
   throw new Test262Error("Expected an exception.");
-
 } catch (e) {
-  verifyEqualTo(arrObj, "1", 3);
-
-  verifyNotWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: 3,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242-1.js
index 7c21f48ca5..b943a2a765 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242-1.js
@@ -20,12 +20,11 @@ Object.defineProperty(arrObj, "0", {
   enumerable: false
 });
 
-verifyEqualTo(arrObj, "0", 1001);
-
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242.js
index 5f1d4a8dce..29b55c9ba9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242.js
@@ -24,8 +24,9 @@ Object.defineProperty(arrObj, "0", {
 
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-1.js
index a87d6172ea..672f5cc677 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-1.js
@@ -27,8 +27,9 @@ arrObj[1] = 4;
 
 verifyEqualTo(arrObj, "1", getFunc());
 
-verifyNotEnumerable(arrObj, "1");
-
-verifyConfigurable(arrObj, "1");
+verifyProperty(arrObj, "1", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-2-strict.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-2-strict.js
index ef5649662c..6ac6382e7d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-2-strict.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-2-strict.js
@@ -29,8 +29,9 @@ assert.throws(TypeError, function() {
 });
 verifyEqualTo(arrObj, "1", getFunc());
 
-verifyNotEnumerable(arrObj, "1");
-
-verifyConfigurable(arrObj, "1");
+verifyProperty(arrObj, "1", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243.js
index 08a11f8705..c6be9ba3ec 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243.js
@@ -27,12 +27,11 @@ Object.defineProperty(arrObj, "1", {
   value: 12
 });
 
-verifyEqualTo(arrObj, "1", 12);
-
-verifyNotWritable(arrObj, "1");
-
-verifyNotEnumerable(arrObj, "1");
-
-verifyConfigurable(arrObj, "1");
+verifyProperty(arrObj, "1", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-244.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-244.js
index e5e1d30c7b..112dc0cbfd 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-244.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-244.js
@@ -22,25 +22,21 @@ Object.defineProperty(arrObj, "1", {
 });
 
 try {
-
   Object.defineProperty(arrObj, "1", {
     writable: true
   });
   throw new Test262Error("Expected an exception.");
-
 } catch (e) {
-  verifyEqualTo(arrObj, "1", undefined);
-
-  verifyNotWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-245.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-245.js
index eae22cfee2..91c5b07da6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-245.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-245.js
@@ -29,18 +29,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "1", 3);
-
-  verifyNotWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: 3,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-246.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-246.js
index dddbc50767..863f1a7c71 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-246.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-246.js
@@ -18,7 +18,6 @@ var arrObj = [];
 
 Object.defineProperty(arrObj, "1", {
   value: -0
-
 });
 
 try {
@@ -27,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "1", -0);
-
-  verifyNotWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: -0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-247.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-247.js
index 1a3085a231..fb296bd6b0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-247.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-247.js
@@ -27,18 +27,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "1", +0);
-
-  verifyNotWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: +0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-248.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-248.js
index b946c44ae1..8bcd5768f8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-248.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-248.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "1", 12);
-
-  verifyNotWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-249.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-249.js
index 9a7132c20f..7753d29ba7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-249.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-249.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "1", "abc");
-
-  verifyNotWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: "abc",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-250.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-250.js
index e4710d7ef8..5475d629db 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-250.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-250.js
@@ -26,18 +26,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "1", false);
-
-  verifyNotWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: false,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-251.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-251.js
index 594cb3a3ee..90796842bc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-251.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-251.js
@@ -29,18 +29,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "1", obj);
-
-  verifyNotWritable(arrObj, "1");
-
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  value: obj,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-252.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-252.js
index ab56258dc1..a3ac4bf1ef 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-252.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-252.js
@@ -32,14 +32,14 @@ try {
 } catch (e) {
   verifyWritable(arrObj, "1", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-253.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-253.js
index a6fbb2221c..90c76748ad 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-253.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-253.js
@@ -32,14 +32,14 @@ try {
 } catch (e) {
   verifyEqualTo(arrObj, "1", getFunc());
 
-  verifyNotEnumerable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "1", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-254.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-254.js
index 857f5bd3e1..3960688abb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-254.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-254.js
@@ -29,7 +29,9 @@ var desc = Object.getOwnPropertyDescriptor(arrObj, "1");
 assert(desc.hasOwnProperty("get") && typeof desc.get === "undefined");
 assert(desc.hasOwnProperty("set") && typeof desc.set === "undefined");
 
-verifyNotEnumerable(arrObj, "1");
-verifyNotConfigurable(arrObj, "1");
+verifyProperty(arrObj, "1", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-255.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-255.js
index 03e3d8a268..d4ec618a12 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-255.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-255.js
@@ -40,9 +40,11 @@ try {
   assert(arrObj[1] === getFunc());
 
   assert(desc.hasOwnProperty("set") && typeof desc.set === "undefined");
-
-  verifyNotEnumerable(arrObj, "1");
-  verifyNotConfigurable(arrObj, "1");
 }
 
+verifyProperty(arrObj, "1", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-256.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-256.js
index a015f2a9a0..20fb18a60a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-256.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-256.js
@@ -38,8 +38,10 @@ try {
   assert(desc.hasOwnProperty("set") && typeof desc.set === "undefined");
 
   verifyNotWritable(arrObj, "1");
-
-  verifyNotConfigurable(arrObj, "1");
 }
 
+verifyProperty(arrObj, "1", {
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-257.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-257.js
index e6e8c2d369..96f9aae122 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-257.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-257.js
@@ -31,8 +31,9 @@ Object.defineProperty(arrObj, "1", {
 
 verifyWritable(arrObj, "1", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "1");
-
-verifyNotConfigurable(arrObj, "1");
+verifyProperty(arrObj, "1", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-258.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-258.js
index 9821d646bb..c1fe51cf10 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-258.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-258.js
@@ -17,12 +17,12 @@ var arrObj = [100];
 Object.defineProperty(arrObj, "0", {
   value: 200
 });
-verifyEqualTo(arrObj, "0", 200);
 
-verifyWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 200,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-259.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-259.js
index b0fbd5e780..e7fbdc8f17 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-259.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-259.js
@@ -17,12 +17,12 @@ var arrObj = [100];
 Object.defineProperty(arrObj, "0", {
   value: undefined
 });
-verifyEqualTo(arrObj, "0", undefined);
 
-verifyWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: undefined,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-260.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-260.js
index 5e2b69c160..3a195ba846 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-260.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-260.js
@@ -16,12 +16,12 @@ var arrObj = [undefined];
 Object.defineProperty(arrObj, "0", {
   value: 100
 });
-verifyEqualTo(arrObj, "0", 100);
 
-verifyWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 100,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-261.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-261.js
index e945f54eeb..7ecc70fc44 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-261.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-261.js
@@ -16,12 +16,12 @@ var arrObj = [100];
 Object.defineProperty(arrObj, "0", {
   writable: false
 });
-verifyEqualTo(arrObj, "0", 100);
 
-verifyNotWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 100,
+  writable: false,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-262.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-262.js
index aed61cb5ae..b9a6475463 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-262.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-262.js
@@ -17,12 +17,12 @@ var arrObj = [100];
 Object.defineProperty(arrObj, "0", {
   enumerable: false
 });
-verifyEqualTo(arrObj, "0", 100);
 
-verifyWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 100,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-263.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-263.js
index b0b4ea2cc0..c0caa9fd90 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-263.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-263.js
@@ -17,12 +17,12 @@ var arrObj = [100];
 Object.defineProperty(arrObj, "0", {
   configurable: false
 });
-verifyEqualTo(arrObj, "0", 100);
 
-verifyWritable(arrObj, "0");
-
-verifyEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 100,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-264.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-264.js
index a7d2eac7f2..97db5f6f91 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-264.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-264.js
@@ -18,12 +18,12 @@ Object.defineProperty(arrObj, "0", {
   enumerable: false,
   configurable: false
 });
-verifyEqualTo(arrObj, "0", 100);
 
-verifyNotWritable(arrObj, "0");
-
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  value: 100,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-265.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-265.js
index f68fdd93f4..ae3d86596c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-265.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-265.js
@@ -28,8 +28,9 @@ Object.defineProperty(arrObj, "0", {
 });
 verifyEqualTo(arrObj, "0", getFunc());
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-266.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-266.js
index 98d664d424..7fd1bfcf7f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-266.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-266.js
@@ -26,8 +26,10 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   get: undefined
 });
-verifyNotEnumerable(arrObj, "0");
 
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-267.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-267.js
index b1d1f3c19e..532c94c676 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-267.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-267.js
@@ -27,8 +27,9 @@ Object.defineProperty(arrObj, "0", {
 });
 verifyEqualTo(arrObj, "0", getFunc());
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-268.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-268.js
index 8f65ec43a1..3f60a9de36 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-268.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-268.js
@@ -27,8 +27,9 @@ Object.defineProperty(arrObj, "0", {
 });
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-269.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-269.js
index 84be2830ff..9f0535aa58 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-269.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-269.js
@@ -22,8 +22,10 @@ Object.defineProperty(arrObj, "0", {
 Object.defineProperty(arrObj, "0", {
   set: undefined
 });
-verifyNotEnumerable(arrObj, "0");
 
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-270.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-270.js
index 696ebb956a..5d22407b0b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-270.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-270.js
@@ -28,8 +28,9 @@ Object.defineProperty(arrObj, "0", {
 });
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-271.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-271.js
index e82084fe9e..f79b212fcf 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-271.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-271.js
@@ -29,8 +29,9 @@ Object.defineProperty(arrObj, "0", {
 });
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-272.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-272.js
index 663614560e..478981ccd2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-272.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-272.js
@@ -28,8 +28,9 @@ Object.defineProperty(arrObj, "0", {
 });
 verifyWritable(arrObj, "0", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "0");
-
-verifyNotConfigurable(arrObj, "0");
+verifyProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-273.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-273.js
index 14d45dbbb5..0855f67372 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-273.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-273.js
@@ -39,8 +39,9 @@ verifyEqualTo(arrObj, "1", getFunc());
 
 verifyWritable(arrObj, "1", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "1");
-
-verifyNotConfigurable(arrObj, "1");
+verifyProperty(arrObj, "1", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-277.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-277.js
index 825c594a6b..919c7ebc51 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-277.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-277.js
@@ -21,12 +21,11 @@ Object.defineProperty(arrObj, "property", {
   configurable: true
 });
 
-verifyEqualTo(arrObj, "property", 12);
-
-verifyWritable(arrObj, "property");
-
-verifyEnumerable(arrObj, "property");
-
-verifyConfigurable(arrObj, "property");
+verifyProperty(arrObj, "property", {
+  value: 12,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-278.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-278.js
index 4ad70e2558..bf537c408d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-278.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-278.js
@@ -32,8 +32,9 @@ verifyEqualTo(arrObj, "property", getFunc());
 
 verifyWritable(arrObj, "property", "setVerifyHelpProp");
 
-verifyEnumerable(arrObj, "property");
-
-verifyConfigurable(arrObj, "property");
+verifyProperty(arrObj, "property", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-279.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-279.js
index 9f78e7cc67..6536ef9bdc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-279.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-279.js
@@ -38,8 +38,9 @@ verifyEqualTo(arrObj, "property", getFunc());
 
 verifyWritable(arrObj, "property", "setVerifyHelpProp");
 
-verifyNotEnumerable(arrObj, "property");
-
-verifyNotConfigurable(arrObj, "property");
+verifyProperty(arrObj, "property", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-280.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-280.js
index 7315c8c784..63f0d7d140 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-280.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-280.js
@@ -21,12 +21,11 @@ Object.defineProperty(arrObj, "property", {
   configurable: false
 });
 
-verifyEqualTo(arrObj, "property", 12);
-
-verifyNotWritable(arrObj, "property");
-
-verifyNotEnumerable(arrObj, "property");
-
-verifyNotConfigurable(arrObj, "property");
+verifyProperty(arrObj, "property", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-281.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-281.js
index 67ec5776bc..36b8dc51e3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-281.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-281.js
@@ -23,18 +23,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "property", 12);
-
-  verifyNotWritable(arrObj, "property");
-
-  verifyNotEnumerable(arrObj, "property");
-
-  verifyNotConfigurable(arrObj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "property", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-282.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-282.js
index 0b05899bc6..01f4174e22 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-282.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-282.js
@@ -23,18 +23,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "property", undefined);
-
-  verifyNotWritable(arrObj, "property");
-
-  verifyNotEnumerable(arrObj, "property");
-
-  verifyNotConfigurable(arrObj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "property", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-283.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-283.js
index 7ca939b4f5..c106eef000 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-283.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-283.js
@@ -23,18 +23,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "property", 12);
-
-  verifyNotWritable(arrObj, "property");
-
-  verifyNotEnumerable(arrObj, "property");
-
-  verifyNotConfigurable(arrObj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "property", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-284.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-284.js
index 48bd118b9c..ef9e68ce98 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-284.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-284.js
@@ -23,18 +23,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(arrObj, "property", 12);
-
-  verifyNotWritable(arrObj, "property");
-
-  verifyNotEnumerable(arrObj, "property");
-
-  verifyNotConfigurable(arrObj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "property", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-285.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-285.js
index 055d7d32d7..5604a04a61 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-285.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-285.js
@@ -37,14 +37,14 @@ try {
 
   verifyWritable(arrObj, "property", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arrObj, "property");
-
-  verifyNotConfigurable(arrObj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-286.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-286.js
index ebf54b5e61..7c2317d15f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-286.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-286.js
@@ -28,14 +28,14 @@ try {
 } catch (e) {
   verifyWritable(arrObj, "property", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arrObj, "property");
-
-  verifyNotConfigurable(arrObj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-287.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-287.js
index 3aa609e301..28ce64b648 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-287.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-287.js
@@ -29,14 +29,14 @@ try {
 } catch (e) {
   verifyWritable(arrObj, "property", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arrObj, "property");
-
-  verifyNotConfigurable(arrObj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-288.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-288.js
index 99317bcbab..a022fc284d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-288.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-288.js
@@ -29,14 +29,14 @@ try {
 } catch (e) {
   verifyWritable(arrObj, "property", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arrObj, "property");
-
-  verifyNotConfigurable(arrObj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(arrObj, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289-1.js
index 9c16dbb07a..83ecff8e49 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289-1.js
@@ -28,13 +28,12 @@ includes: [propertyHelper.js]
     throw new Test262Error("Expected a === 0, actually " + a);
   }
 
-  verifyEqualTo(arguments, "0", 10);
-
-  verifyWritable(arguments, "0");
-
-  verifyEnumerable(arguments, "0");
-
-  verifyConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: true,
+    enumerable: true,
+    configurable: true,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289.js
index 4b90e38ef6..c5f4bc699a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289.js
@@ -19,13 +19,13 @@ includes: [propertyHelper.js]
     enumerable: true,
     configurable: true
   });
-  verifyEqualTo(arguments, "0", 10);
 
-  verifyWritable(arguments, "0");
-
-  verifyEnumerable(arguments, "0");
-
-  verifyConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: true,
+    enumerable: true,
+    configurable: true,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290-1.js
index 71fa4baeff..b31957da09 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290-1.js
@@ -37,9 +37,10 @@ includes: [propertyHelper.js]
 
   verifyWritable(arguments, "0", "setVerifyHelpProp");
 
-  verifyEnumerable(arguments, "0");
-
-  verifyConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    enumerable: true,
+    configurable: true,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290.js
index 6b4d350268..204d9550c6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290.js
@@ -31,9 +31,10 @@ includes: [propertyHelper.js]
 
   verifyWritable(arguments, "0", "setVerifyHelpProp");
 
-  verifyEnumerable(arguments, "0");
-
-  verifyConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    enumerable: true,
+    configurable: true,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291-1.js
index 04faea4a9e..98cac6c8b0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291-1.js
@@ -36,9 +36,10 @@ includes: [propertyHelper.js]
 
   verifyEqualTo(arguments, "0", getFunc2());
 
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291.js
index 0d936a72a3..d7b113d7d4 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291.js
@@ -31,9 +31,10 @@ includes: [propertyHelper.js]
   });
   verifyEqualTo(arguments, "0", getFunc2());
 
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-1.js
index 124143b87c..8eb28bae83 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-1.js
@@ -25,13 +25,12 @@ flags: [noStrict]
     throw new Test262Error('Expected a === 20, actually ' + a);
   }
 
-  verifyEqualTo(arguments, "0", 20);
-
-  verifyNotWritable(arguments, "0");
-
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-2-strict.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-2-strict.js
index 5327e61f5d..da294bea67 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-2-strict.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-2-strict.js
@@ -26,13 +26,12 @@ flags: [onlyStrict]
     throw new Test262Error('Expected a === 0, actually ' + a);
   }
 
-  verifyEqualTo(arguments, "0", 20);
-
-  verifyNotWritable(arguments, "0");
-
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292.js
index 7091d42cf8..b96b3476f4 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292.js
@@ -18,13 +18,13 @@ includes: [propertyHelper.js]
     enumerable: false,
     configurable: false
   });
-  verifyEqualTo(arguments, "0", 20);
 
-  verifyNotWritable(arguments, "0");
-
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-1.js
index 642e95f413..f4d493bade 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-1.js
@@ -20,13 +20,13 @@ includes: [propertyHelper.js]
   Object.defineProperty(arguments, "0", {
     value: 20
   });
-  verifyEqualTo(arguments, "0", 20);
 
-  verifyNotWritable(arguments, "0");
-
-  verifyEnumerable(arguments, "0");
-
-  verifyConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: true,
+    configurable: true,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-2.js
index 063ab121d1..9ed17e4bb3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-2.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-2.js
@@ -28,24 +28,21 @@ flags: [noStrict]
     throw new Test262Error("Expected an exception.");
 
   } catch (e) {
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
 
-    verifyEqualTo(arguments, "0", 10);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (a !== 10) {
       throw new Test262Error('Expected "a === 10", actually ' + a);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-3.js
index a27f584a65..bb3170d229 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-3.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-3.js
@@ -26,13 +26,12 @@ flags: [noStrict]
     throw new Test262Error('Expected "a === 10", actually ' + a);
   }
 
-  verifyEqualTo(arguments, "0", 20);
-
-  verifyNotWritable(arguments, "0");
-
-  verifyEnumerable(arguments, "0");
-
-  verifyConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: true,
+    configurable: true,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-4-strict.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-4-strict.js
index 03ace78694..6e6c2d9eda 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-4-strict.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-4-strict.js
@@ -27,13 +27,12 @@ flags: [onlyStrict]
     throw new Test262Error('Expected "a === 0", actually ' + a);
   }
 
-  verifyEqualTo(arguments, "0", 20);
-
-  verifyNotWritable(arguments, "0");
-
-  verifyEnumerable(arguments, "0");
-
-  verifyConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: true,
+    configurable: true,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293.js
index 4ca208ba8e..002556ebbe 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293.js
@@ -25,19 +25,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "0", 10);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294-1.js
index e358ab75e8..38413c6b14 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294-1.js
@@ -32,20 +32,17 @@ flags: [noStrict]
       throw new Test262Error("Expected TypeError, got " + e);
     }
 
-    verifyEqualTo(arguments, "0", 10);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (a !== 10) {
       throw new Test262Error('Expected "a === 10", actually ' + a);
     }
-
   }
 
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294.js
index 08c69e755e..5138dc4c3f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294.js
@@ -24,19 +24,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "0", 10);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295-1.js
index 394066dfc2..3045dee339 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295-1.js
@@ -32,18 +32,17 @@ flags: [noStrict]
       throw new Test262Error("Expected TypeError, got " + e);
     }
 
-    verifyEqualTo(arguments, "0", 10);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (a !== 10) {
       throw new Test262Error('Expected "a === 10", actually ' + a);
     }
   }
+
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: true,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295.js
index cd7eb340b7..34df8eb700 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295.js
@@ -24,19 +24,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "0", 10);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: true,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296-1.js
index 77e9fe1642..90a53ae720 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296-1.js
@@ -31,18 +31,17 @@ flags: [noStrict]
       throw new Test262Error("Expected TypeError, got " + e);
     }
 
-    verifyEqualTo(arguments, "0", 10);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (a !== 10) {
       throw new Test262Error('Expected "a === 10", actually ' + a);
     }
   }
+
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296.js
index 8625821007..af40ff4d9c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296.js
@@ -24,19 +24,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "0", 10);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297-1.js
index 8627560fa9..ec2b3857da 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297-1.js
@@ -38,15 +38,15 @@ includes: [propertyHelper.js]
 
     verifyEqualTo(arguments, "0", getFunc1());
 
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297.js
index e738fc84a3..fee2b5a6d6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297.js
@@ -32,15 +32,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyEqualTo(arguments, "0", getFunc1());
 
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298-1.js
index 9cb976b0fd..3bf5f45f96 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298-1.js
@@ -39,15 +39,15 @@ includes: [propertyHelper.js]
 
     verifyEqualTo(arguments, "0", getFunc());
 
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298.js
index 651330f8f5..e0f0627691 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298.js
@@ -33,15 +33,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyEqualTo(arguments, "0", getFunc());
 
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299-1.js
index 2ef3e98416..f56db5b666 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299-1.js
@@ -33,15 +33,15 @@ includes: [propertyHelper.js]
     }
     verifyEqualTo(arguments, "0", getFunc());
 
-    verifyEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: true,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299.js
index 8294112d3a..533e491194 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299.js
@@ -28,15 +28,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyEqualTo(arguments, "0", getFunc());
 
-    verifyEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: true,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300-1.js
index 802dd24613..b3d77c7423 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300-1.js
@@ -33,15 +33,15 @@ includes: [propertyHelper.js]
     }
     verifyEqualTo(arguments, "0", getFunc());
 
-    verifyEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: true,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300.js
index 2341d87dca..6e14aa45a6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300.js
@@ -28,15 +28,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyEqualTo(arguments, "0", getFunc());
 
-    verifyEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: true,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301-1.js
index 50854b502f..ba3ff3691c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301-1.js
@@ -23,13 +23,13 @@ includes: [propertyHelper.js]
   if (a !== 0) {
     throw new Test262Error("Expected a === 0, actually " + a);
   }
-  verifyEqualTo(arguments, "0", 10);
 
-  verifyNotWritable(arguments, "0");
-
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301.js
index 6387b45b3c..0f32d2e7bc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301.js
@@ -20,13 +20,13 @@ includes: [propertyHelper.js]
     enumerable: false,
     configurable: false
   });
-  verifyEqualTo(arguments, "0", 10);
 
-  verifyNotWritable(arguments, "0");
-
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302-1.js
index d9e24450e1..2ccfa7b7b0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302-1.js
@@ -36,9 +36,10 @@ includes: [propertyHelper.js]
 
   verifyWritable(arguments, "0", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302.js
index 40fe4d4fcd..a3818170b8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302.js
@@ -32,9 +32,10 @@ includes: [propertyHelper.js]
 
   verifyWritable(arguments, "0", "setVerifyHelpProp");
 
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }(0, 1, 2));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-303.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-303.js
index e1d15a9dcd..b627552c2b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-303.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-303.js
@@ -32,9 +32,10 @@ includes: [propertyHelper.js]
   });
   verifyEqualTo(arguments, "0", getFunc2());
 
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }());
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-304.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-304.js
index 058949b82b..a327b5b422 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-304.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-304.js
@@ -19,13 +19,13 @@ includes: [propertyHelper.js]
     enumerable: false,
     configurable: false
   });
-  verifyEqualTo(arguments, "0", 20);
 
-  verifyNotWritable(arguments, "0");
-
-  verifyNotEnumerable(arguments, "0");
-
-  verifyNotConfigurable(arguments, "0");
+  verifyProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }());
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-305.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-305.js
index 88e3ea9526..fedd5c087c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-305.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-305.js
@@ -25,19 +25,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "0", 0);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    value: 0,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }());
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-306.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-306.js
index a33eff559b..54208f8013 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-306.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-306.js
@@ -25,19 +25,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "0", 0);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    value: 0,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }());
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-307.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-307.js
index c9fdf870ff..df233b482d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-307.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-307.js
@@ -25,19 +25,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "0", 0);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    value: 0,
+    writable: false,
+    enumerable: true,
+    configurable: false,
+  });
 }());
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-308.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-308.js
index aceabc53a0..e9cff62621 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-308.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-308.js
@@ -25,19 +25,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "0", 0);
-
-    verifyNotWritable(arguments, "0");
-
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    value: 0,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }());
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-309.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-309.js
index f1803f13cd..36adce5824 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-309.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-309.js
@@ -33,15 +33,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyEqualTo(arguments, "0", getFunc1());
 
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }());
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-310.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-310.js
index 094229861a..462d472756 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-310.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-310.js
@@ -34,15 +34,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyEqualTo(arguments, "0", getFunc());
 
-    verifyNotEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: false,
+    configurable: false,
+  });
 }());
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-311.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-311.js
index ede81f7918..9a4c8172be 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-311.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-311.js
@@ -29,15 +29,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyEqualTo(arguments, "0", getFunc());
 
-    verifyEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: true,
+    configurable: false,
+  });
 }());
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-312.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-312.js
index eaf2c27fab..b906d92976 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-312.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-312.js
@@ -27,15 +27,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyEqualTo(arguments, "0", getFunc());
 
-    verifyEnumerable(arguments, "0");
-
-    verifyNotConfigurable(arguments, "0");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "0", {
+    enumerable: true,
+    configurable: false,
+  });
 }());
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313-1.js
index 24f6b77d8b..f51e471fec 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313-1.js
@@ -18,13 +18,13 @@ includes: [propertyHelper.js]
     enumerable: true,
     configurable: true
   });
-  verifyEqualTo(arguments, "genericProperty", 1001);
 
-  verifyWritable(arguments, "genericProperty");
-
-  verifyEnumerable(arguments, "genericProperty");
-
-  verifyConfigurable(arguments, "genericProperty");
+  verifyProperty(arguments, "genericProperty", {
+    value: 1001,
+    writable: true,
+    enumerable: true,
+    configurable: true,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313.js
index 5f5650d942..815ad29d11 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313.js
@@ -18,13 +18,13 @@ includes: [propertyHelper.js]
     enumerable: true,
     configurable: true
   });
-  verifyEqualTo(arguments, "genericProperty", 1001);
 
-  verifyWritable(arguments, "genericProperty");
-
-  verifyEnumerable(arguments, "genericProperty");
-
-  verifyConfigurable(arguments, "genericProperty");
+  verifyProperty(arguments, "genericProperty", {
+    value: 1001,
+    writable: true,
+    enumerable: true,
+    configurable: true,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314-1.js
index aaa4d6a0fc..60c2f1066f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314-1.js
@@ -29,9 +29,10 @@ includes: [propertyHelper.js]
 
   verifyWritable(arguments, "genericProperty", "testgetFunction");
 
-  verifyEnumerable(arguments, "genericProperty");
-
-  verifyConfigurable(arguments, "genericProperty");
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: true,
+    configurable: true,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314.js
index 707689d404..de44b05071 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314.js
@@ -29,9 +29,10 @@ includes: [propertyHelper.js]
 
   verifyWritable(arguments, "genericProperty", "testgetFunction");
 
-  verifyEnumerable(arguments, "genericProperty");
-
-  verifyConfigurable(arguments, "genericProperty");
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: true,
+    configurable: true,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315-1.js
index 078b2b0c03..83290dddd1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315-1.js
@@ -44,9 +44,10 @@ includes: [propertyHelper.js]
 
   verifyWritable(arguments, "genericProperty", "testgetFunction");
 
-  verifyNotEnumerable(arguments, "genericProperty");
-
-  verifyNotConfigurable(arguments, "genericProperty");
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315.js
index f9e6b876a8..7d6c5b80c8 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315.js
@@ -40,9 +40,10 @@ includes: [propertyHelper.js]
 
   verifyWritable(arguments, "genericProperty", "testgetFunction");
 
-  verifyNotEnumerable(arguments, "genericProperty");
-
-  verifyNotConfigurable(arguments, "genericProperty");
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316-1.js
index 4c18c0b45c..9d4203c2b7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316-1.js
@@ -23,13 +23,13 @@ includes: [propertyHelper.js]
     enumerable: false,
     configurable: false
   });
-  verifyEqualTo(arguments, "genericProperty", 1002);
 
-  verifyWritable(arguments, "genericProperty");
-
-  verifyNotEnumerable(arguments, "genericProperty");
-
-  verifyNotConfigurable(arguments, "genericProperty");
+  verifyProperty(arguments, "genericProperty", {
+    value: 1002,
+    writable: true,
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316.js
index 6683891473..7ed325b7ab 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316.js
@@ -23,13 +23,13 @@ includes: [propertyHelper.js]
     enumerable: false,
     configurable: false
   });
-  verifyEqualTo(arguments, "genericProperty", 1002);
 
-  verifyWritable(arguments, "genericProperty");
-
-  verifyNotEnumerable(arguments, "genericProperty");
-
-  verifyNotConfigurable(arguments, "genericProperty");
+  verifyProperty(arguments, "genericProperty", {
+    value: 1002,
+    writable: true,
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317-1.js
index be820cbce1..5eec5035ee 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317-1.js
@@ -28,19 +28,17 @@ includes: [propertyHelper.js]
       throw new Test262Error('Expected "b === 2;", actually ' + b);
     }
 
-    verifyEqualTo(arguments, "genericProperty", 1001);
-
-    verifyNotWritable(arguments, "genericProperty");
-
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    value: 1001,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317.js
index 77ca0ba862..0d7c8266b0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317.js
@@ -23,19 +23,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "genericProperty", 1001);
-
-    verifyNotWritable(arguments, "genericProperty");
-
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    value: 1001,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318-1.js
index c275772feb..acd8d37483 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318-1.js
@@ -23,19 +23,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "genericProperty", undefined);
-
-    verifyNotWritable(arguments, "genericProperty");
-
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    value: undefined,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318.js
index 95284091f6..ce31e7dc9f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318.js
@@ -22,21 +22,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "genericProperty", undefined);
-
-    verifyNotWritable(arguments, "genericProperty");
-
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
 
+  verifyProperty(arguments, "genericProperty", {
+    value: undefined,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319-1.js
index 6f184f8196..449fdf3fbd 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319-1.js
@@ -23,20 +23,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "genericProperty", undefined);
-
-    verifyNotWritable(arguments, "genericProperty");
-
-    verifyEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    value: undefined,
+    writable: false,
+    enumerable: true,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319.js
index d4c4c20dc9..a9059f043f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319.js
@@ -22,19 +22,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "genericProperty", undefined);
-
-    verifyNotWritable(arguments, "genericProperty");
-
-    verifyEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    value: undefined,
+    writable: false,
+    enumerable: true,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320-1.js
index 794b689a98..343a81b5eb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320-1.js
@@ -22,19 +22,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "genericProperty", undefined);
-
-    verifyNotWritable(arguments, "genericProperty");
-
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    value: undefined,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320.js
index 2d16488d20..018b12ae85 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320.js
@@ -21,21 +21,17 @@ includes: [propertyHelper.js]
     });
     throw new Test262Error("Expected an exception.");
   } catch (e) {
-    verifyEqualTo(arguments, "genericProperty", undefined);
-
-    verifyNotWritable(arguments, "genericProperty");
-
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
 
+  verifyProperty(arguments, "genericProperty", {
+    value: undefined,
+    writable: false,
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321-1.js
index f0b19aff91..328f00ac56 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321-1.js
@@ -41,15 +41,15 @@ includes: [propertyHelper.js]
 
     verifyWritable(arguments, "genericProperty", "helpVerifyGet");
 
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321.js
index ce1ebc65ec..cc21c38b96 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321.js
@@ -36,15 +36,15 @@ includes: [propertyHelper.js]
 
     verifyWritable(arguments, "genericProperty", "helpVerifyGet");
 
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322-1.js
index 4261b4980b..e50a02d336 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322-1.js
@@ -30,15 +30,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyWritable(arguments, "genericProperty", "genericPropertyString");
 
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322.js
index 9414c90d54..3d52c42a3d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322.js
@@ -29,15 +29,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyWritable(arguments, "genericProperty", "genericPropertyString");
 
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323-1.js
index 769c0a8634..252fad78ae 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323-1.js
@@ -32,16 +32,15 @@ includes: [propertyHelper.js]
     }
     verifyWritable(arguments, "genericProperty", "genericPropertyString");
 
-    verifyEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
 
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: true,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323.js
index a6e17705ef..ee0cbf67ac 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323.js
@@ -28,15 +28,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyWritable(arguments, "genericProperty", "genericPropertyString");
 
-    verifyEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: true,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324-1.js
index 949102ee2f..0bffa63c65 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324-1.js
@@ -28,15 +28,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyWritable(arguments, "genericProperty", "genericPropertyString");
 
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
+
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324.js
index bd7e47b2d2..c7f0a023f6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324.js
@@ -27,16 +27,15 @@ includes: [propertyHelper.js]
   } catch (e) {
     verifyWritable(arguments, "genericProperty", "genericPropertyString");
 
-    verifyNotEnumerable(arguments, "genericProperty");
-
-    verifyNotConfigurable(arguments, "genericProperty");
-
     if (!(e instanceof TypeError)) {
       throw new Test262Error("Expected TypeError, got " + e);
     }
-
   }
-  false;
+
+  verifyProperty(arguments, "genericProperty", {
+    enumerable: false,
+    configurable: false,
+  });
 }(1, 2, 3));
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-1.js
index b38f669f07..b1eb009f19 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-1.js
@@ -24,12 +24,11 @@ Object.defineProperty(obj, "property", {
   value: 1002
 });
 
-verifyEqualTo(obj, "property", 1002);
-
-verifyWritable(obj, "property");
-
-verifyNotEnumerable(obj, "property");
-
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  value: 1002,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-2.js
index 2c7ac9fd07..e2df9640ff 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-2.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-2.js
@@ -24,12 +24,11 @@ Object.defineProperty(obj, "0", {
   value: 1002
 });
 
-verifyEqualTo(obj, "0", 1002);
-
-verifyWritable(obj, "0");
-
-verifyNotEnumerable(obj, "0");
-
-verifyNotConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1002,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-3.js
index 214436cb50..cd9db364ea 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-3.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-3.js
@@ -26,12 +26,11 @@ Object.defineProperty(obj, "property", {
   value: 1002
 });
 
-verifyEqualTo(obj, "property", 1002);
-
-verifyWritable(obj, "property");
-
-verifyNotEnumerable(obj, "property");
-
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  value: 1002,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-6.js
index 21265866ff..77186e1b85 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-6.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-6.js
@@ -24,12 +24,11 @@ Object.defineProperty(obj, "0", {
   value: 1002
 });
 
-verifyEqualTo(obj, "0", 1002);
-
-verifyWritable(obj, "0");
-
-verifyNotEnumerable(obj, "0");
-
-verifyNotConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1002,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-7.js
index dea755a355..8881de5da7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-7.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-7.js
@@ -24,12 +24,11 @@ Object.defineProperty(obj, "prop", {
   value: 1002
 });
 
-verifyEqualTo(obj, "prop", 1002);
-
-verifyWritable(obj, "prop");
-
-verifyNotEnumerable(obj, "prop");
-
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  value: 1002,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-8.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-8.js
index 785d0adc99..1e440f485b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-8.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-8.js
@@ -26,12 +26,11 @@ Object.defineProperty(obj, "0", {
   value: 1002
 });
 
-verifyEqualTo(obj, "0", 1002);
-
-verifyWritable(obj, "0");
-
-verifyNotEnumerable(obj, "0");
-
-verifyNotConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1002,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-335.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-335.js
index 177a249f90..8afe8c12f0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-335.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-335.js
@@ -18,8 +18,9 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
-assert.sameValue(obj.prop, 2010);
+verifyProperty(obj, "prop", {
+  value: 2010,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-349.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-349.js
index 143606c7a9..af098aa486 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-349.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-349.js
@@ -18,8 +18,9 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
-assert.sameValue(obj.prop, 2010);
+verifyProperty(obj, "prop", {
+  value: 2010,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-1.js
index 3e580abc51..f17f51615c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-1.js
@@ -24,12 +24,11 @@ Object.defineProperty(obj, "property", {
   value: 1002
 });
 
-verifyEqualTo(obj, "property", 1002);
-
-verifyNotWritable(obj, "property");
-
-verifyNotEnumerable(obj, "property");
-
-verifyConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  value: 1002,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-10.js
index 4fa47d892d..78e8a4e234 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-10.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-10.js
@@ -24,12 +24,11 @@ Object.defineProperty(obj, "0", {
   value: 1002
 });
 
-verifyEqualTo(obj, "0", 1002);
-
-verifyNotWritable(obj, "0");
-
-verifyNotEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1002,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-11.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-11.js
index 0f23373bff..3cde36b73f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-11.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-11.js
@@ -24,12 +24,11 @@ Object.defineProperty(obj, "prop", {
   value: 1002
 });
 
-verifyEqualTo(obj, "prop", 1002);
-
-verifyNotWritable(obj, "prop");
-
-verifyNotEnumerable(obj, "prop");
-
-verifyConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  value: 1002,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-12.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-12.js
index c301667d62..762a767ecc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-12.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-12.js
@@ -26,12 +26,11 @@ Object.defineProperty(obj, "0", {
   value: 1002
 });
 
-verifyEqualTo(obj, "0", 1002);
-
-verifyNotWritable(obj, "0");
-
-verifyNotEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1002,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-15.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-15.js
index 42cf188ef5..df68d33fc5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-15.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-15.js
@@ -19,7 +19,9 @@ Object.defineProperty(obj, "prop", {
   configurable: true
 });
 
-assert.sameValue(obj.prop, 2010);
-verifyNotWritable(obj, "prop");
+verifyProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-16.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-16.js
index b5947a8818..94466d9dcf 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-16.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-16.js
@@ -22,7 +22,9 @@ Object.defineProperty(obj, "0", {
   configurable: true
 });
 
-assert.sameValue(obj[0], 2010);
-verifyNotWritable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 2010,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-2.js
index 60ef5a8187..25c8fd2b22 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-2.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-2.js
@@ -24,12 +24,11 @@ Object.defineProperty(obj, "0", {
   value: 1002
 });
 
-verifyEqualTo(obj, "0", 1002);
-
-verifyNotWritable(obj, "0");
-
-verifyNotEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1002,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-3.js
index fecfdd55a4..7567ddf16d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-3.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-3.js
@@ -25,12 +25,11 @@ Object.defineProperty(obj, "property", {
   value: 1002
 });
 
-verifyEqualTo(obj, "property", 1002);
-
-verifyNotWritable(obj, "property");
-
-verifyNotEnumerable(obj, "property");
-
-verifyConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  value: 1002,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-6.js
index 140bc5b7f7..58669c9a14 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-6.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-6.js
@@ -19,7 +19,9 @@ Object.defineProperty(obj, "0", {
   configurable: true
 });
 
-assert.sameValue(obj[0], 2010);
-verifyNotWritable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 2010,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-7.js
index 31fffa2ee2..c7f38278ed 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-7.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-7.js
@@ -21,7 +21,9 @@ Object.defineProperty(obj, "prop", {
   configurable: true
 });
 
-assert.sameValue(obj.prop, 2010);
-verifyNotWritable(obj, "prop");
+verifyProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354.js
index dbf15887fb..d43159c7c6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354.js
@@ -18,7 +18,9 @@ Object.defineProperty(obj, "prop", {
   configurable: true
 });
 
-assert.sameValue(obj.prop, 2010);
-verifyNotWritable(obj, "prop");
+verifyProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-361.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-361.js
index ddaf657cd8..5369b5da0b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-361.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-361.js
@@ -18,7 +18,9 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert.sameValue(obj.prop, 2010);
-verifyNotWritable(obj, "prop");
+verifyProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-363.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-363.js
index 5eb3404f36..cd9b1d6519 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-363.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-363.js
@@ -18,7 +18,8 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-368.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-368.js
index 1faaa98d37..1a9cb6b12b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-368.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-368.js
@@ -18,7 +18,9 @@ Object.defineProperty(obj, "prop", {
   configurable: true
 });
 
-assert.sameValue(obj.prop, 2010);
-verifyNotWritable(obj, "prop");
+verifyProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-375.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-375.js
index b41c9513e2..9c9cbd5511 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-375.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-375.js
@@ -18,7 +18,9 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert.sameValue(obj.prop, 2010);
-verifyNotWritable(obj, "prop");
+verifyProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-377.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-377.js
index efd2e54659..c9102fcc6f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-377.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-377.js
@@ -18,7 +18,8 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-38.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-38.js
index f40b4f152a..b3ac2b6d88 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-38.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-38.js
@@ -16,13 +16,12 @@ try {
     configurable: true
   });
 
-  verifyEqualTo(Math, "foo", 12);
-
-  verifyNotWritable(Math, "foo");
-
-  verifyNotEnumerable(Math, "foo");
-
-  verifyConfigurable(Math, "foo");
+  verifyProperty(Math, "foo", {
+    value: 12,
+    writable: false,
+    enumerable: false,
+    configurable: true,
+  });
 } finally {
   delete Math.foo;
 }
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-41.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-41.js
index e69119a145..df5be6a6c9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-41.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-41.js
@@ -16,13 +16,12 @@ Object.defineProperty(JSON, "foo", {
   configurable: true
 });
 
-verifyEqualTo(JSON, "foo", 12);
-
-verifyNotWritable(JSON, "foo");
-
-verifyNotEnumerable(JSON, "foo");
-
-verifyConfigurable(JSON, "foo");
+verifyProperty(JSON, "foo", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 delete JSON.foo;
 
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-429.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-429.js
index 1484ccd385..074908184e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-429.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-429.js
@@ -24,11 +24,11 @@ var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
 Object.defineProperty(obj, "prop", {
   configurable: false
 });
-var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
 
-verifyNotConfigurable(obj, "prop");
 assert.sameValue(desc1.configurable, true);
-assert.sameValue(desc2.configurable, false);
-assert(obj.hasOwnProperty("prop"));
+
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-434.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-434.js
index 0c278f09b7..7d3bd1adc5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-434.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-434.js
@@ -19,12 +19,8 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-
-var desc = Object.getOwnPropertyDescriptor(obj, "prop");
-
-assert.sameValue(desc.configurable, false);
-
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-438.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-438.js
index ccf6b3d0aa..25bb6064b0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-438.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-438.js
@@ -30,14 +30,11 @@ try {
 } catch (e) {
   assert(e instanceof TypeError);
 
-  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
   assert.sameValue(desc1.configurable, false);
-  assert.sameValue(desc2.configurable, false);
-
-  verifyNotConfigurable(obj, "prop");
-
-  assert(obj.hasOwnProperty("prop"));
 }
 
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-447.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-447.js
index e7580caeb2..e983a44b71 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-447.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-447.js
@@ -25,12 +25,10 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
 assert.sameValue(desc1.configurable, true);
-assert.sameValue(desc2.configurable, false);
 
-verifyNotConfigurable(obj, "prop");
-assert(obj.hasOwnProperty("prop"));
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-45.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-45.js
index 65701f6c78..63126072c2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-45.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-45.js
@@ -15,12 +15,11 @@ Object.defineProperty(this, "foo", {
   configurable: true
 });
 
-verifyEqualTo(this, "foo", 12);
-
-verifyNotWritable(this, "foo");
-
-verifyNotEnumerable(this, "foo");
-
-verifyConfigurable(this, "foo");
+verifyProperty(this, "foo", {
+  value: 12,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-452.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-452.js
index d099d78495..19a74b78ac 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-452.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-452.js
@@ -19,12 +19,8 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-
-var desc = Object.getOwnPropertyDescriptor(obj, "prop");
-
-assert.sameValue(desc.configurable, false);
-
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-456.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-456.js
index da9397f14d..3f008f372c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-456.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-456.js
@@ -30,14 +30,11 @@ try {
 } catch (e) {
   assert(e instanceof TypeError);
 
-  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
   assert.sameValue(desc1.configurable, false);
-  assert.sameValue(desc2.configurable, false);
-
-  verifyNotConfigurable(obj, "prop");
-
-  assert(obj.hasOwnProperty("prop"));
 }
 
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-465.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-465.js
index 6ff40b2cc5..f4071187d6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-465.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-465.js
@@ -30,12 +30,10 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
 assert.sameValue(desc1.configurable, true);
-assert.sameValue(desc2.configurable, false);
 
-verifyNotConfigurable(obj, "prop");
-assert(obj.hasOwnProperty("prop"));
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-47.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-47.js
index 4b8fd1bf7f..6734e898d6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-47.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-47.js
@@ -18,12 +18,11 @@ Object.defineProperty(obj, "property", {
   configurable: false
 });
 
-verifyEqualTo(obj, "property", undefined);
-
-verifyWritable(obj, "property");
-
-verifyEnumerable(obj, "property");
-
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  value: undefined,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-470.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-470.js
index 39b025006b..9a8cdc0e77 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-470.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-470.js
@@ -26,13 +26,10 @@ Object.defineProperty(obj, "prop", {
 
 assert(obj.hasOwnProperty("prop"));
 
-var desc = Object.getOwnPropertyDescriptor(obj, "prop");
-
 verifyNotWritable(obj, "prop");
-verifyNotConfigurable(obj, "prop");
-
-assert.sameValue(desc.configurable, false);
 
-assert(obj.hasOwnProperty("prop"));
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-474.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-474.js
index ce3fa250dd..6c9bdd63e7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-474.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-474.js
@@ -35,14 +35,11 @@ try {
 } catch (e) {
   assert(e instanceof TypeError);
 
-  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
   assert.sameValue(desc1.configurable, false);
-  assert.sameValue(desc2.configurable, false);
-
-  verifyNotConfigurable(obj, "prop");
-
-  assert(obj.hasOwnProperty("prop"));
 }
 
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-48.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-48.js
index 1dcf25ea46..68228104fc 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-48.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-48.js
@@ -18,12 +18,11 @@ Object.defineProperty(obj, "property", {
   configurable: false
 });
 
-verifyEqualTo(obj, "property", 1001);
-
-verifyNotWritable(obj, "property");
-
-verifyEnumerable(obj, "property");
-
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  value: 1001,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-483.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-483.js
index 118a8aac10..44225c7497 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-483.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-483.js
@@ -30,13 +30,10 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
 assert.sameValue(desc1.configurable, true);
-assert.sameValue(desc2.configurable, false);
-
-verifyNotConfigurable(obj, "prop");
 
-assert(obj.hasOwnProperty("prop"));
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-488.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-488.js
index 0785a3996e..c6155cd8de 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-488.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-488.js
@@ -24,13 +24,8 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-
-var desc = Object.getOwnPropertyDescriptor(obj, "prop");
-
-verifyNotConfigurable(obj, "prop");
-assert.sameValue(desc.configurable, false);
-
-assert(obj.hasOwnProperty("prop"));
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-49.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-49.js
index 9e45eed271..5861ea3315 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-49.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-49.js
@@ -17,12 +17,12 @@ Object.defineProperty(obj, "property", {
   writable: true,
   configurable: true
 });
-verifyEqualTo(obj, "property", 1001);
 
-verifyWritable(obj, "property");
-
-verifyNotEnumerable(obj, "property");
-
-verifyConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  value: 1001,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-492.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-492.js
index cc418c9e12..08df806be9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-492.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-492.js
@@ -35,14 +35,11 @@ try {
 } catch (e) {
   assert(e instanceof TypeError);
 
-  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
-
   assert.sameValue(desc1.configurable, false);
-  assert.sameValue(desc2.configurable, false);
-
-  assert(obj.hasOwnProperty("prop"));
 }
 
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-50.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-50.js
index f49f61a6c3..3a3a1ae707 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-50.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-50.js
@@ -17,12 +17,12 @@ Object.defineProperty(obj, "property", {
   writable: true,
   enumerable: true
 });
-verifyEqualTo(obj, "property", 1001);
 
-verifyWritable(obj, "property");
-
-verifyEnumerable(obj, "property");
-
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-501.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-501.js
index 7de38b5055..436f8d63e3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-501.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-501.js
@@ -29,14 +29,12 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
 assert.sameValue(desc1.configurable, true);
-assert.sameValue(desc2.configurable, false);
 
 verifyNotWritable(obj, "prop");
-verifyNotConfigurable(obj, "prop");
 
-assert(obj.hasOwnProperty("prop"));
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-506.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-506.js
index 8ad6ca3b7c..a65dd9b778 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-506.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-506.js
@@ -23,14 +23,8 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-
-var desc = Object.getOwnPropertyDescriptor(obj, "prop");
-
-assert.sameValue(desc.configurable, false);
-
-verifyNotConfigurable(obj, "prop");
-
-assert(obj.hasOwnProperty("prop"));
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-51.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-51.js
index 989d71d164..7c987bdbb3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-51.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-51.js
@@ -20,12 +20,11 @@ Object.defineProperty(obj, "property", {
   configurable: false
 });
 
-verifyEqualTo(obj, "property", 1001);
-
-verifyNotWritable(obj, "property");
-
-verifyNotEnumerable(obj, "property");
-
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-510.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-510.js
index 325f76e16c..418d8113e1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-510.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-510.js
@@ -34,14 +34,11 @@ try {
 } catch (e) {
   assert(e instanceof TypeError);
 
-  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
   assert.sameValue(desc1.configurable, false);
-  assert.sameValue(desc2.configurable, false);
-
-  verifyNotConfigurable(obj, "prop");
-
-  assert(obj.hasOwnProperty("prop"));
 }
 
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-519.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-519.js
index 60baf731ee..b5305b02e3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-519.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-519.js
@@ -29,13 +29,10 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
 assert.sameValue(desc1.configurable, true);
-assert.sameValue(desc2.configurable, false);
-
-verifyNotConfigurable(obj, "prop");
 
-assert(obj.hasOwnProperty("prop"));
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-52.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-52.js
index 0d2ca8420a..4c2713c081 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-52.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-52.js
@@ -14,12 +14,11 @@ var obj = {};
 
 Object.defineProperty(obj, "property", {});
 
-verifyEqualTo(obj, "property", undefined);
-
-verifyNotWritable(obj, "property");
-
-verifyNotEnumerable(obj, "property");
-
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-524.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-524.js
index aa6fe43c25..7f2161477f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-524.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-524.js
@@ -23,13 +23,8 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-var desc = Object.getOwnPropertyDescriptor(obj, "prop");
-
-assert.sameValue(desc.configurable, false);
-
-verifyNotConfigurable(obj, "prop");
-
-assert(obj.hasOwnProperty("prop"));
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-528.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-528.js
index b666822536..5dab355151 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-528.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-528.js
@@ -34,14 +34,11 @@ try {
 } catch (e) {
   assert(e instanceof TypeError);
 
-  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-
   assert.sameValue(desc1.configurable, false);
-  assert.sameValue(desc2.configurable, false);
-
-  verifyNotConfigurable(obj, "prop");
-
-  assert(obj.hasOwnProperty("prop"));
 }
 
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-53.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-53.js
index b8dd34d5ab..2da947a546 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-53.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-53.js
@@ -23,8 +23,9 @@ Object.defineProperty(obj, "property", {
 
 verifyWritable(obj, "property", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "property");
-
-verifyConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-1.js
index 167099fb52..8326068541 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-1.js
@@ -40,8 +40,9 @@ verifyEqualTo(obj, "property", getFunc());
 
 verifyWritable(obj, "property", "verifySetFunction1");
 
-verifyNotEnumerable(obj, "property");
-
-verifyConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-10.js
index 50dbf751f4..a419791c35 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-10.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-10.js
@@ -42,8 +42,9 @@ verifyEqualTo(obj, "0", getFunc());
 
 verifyWritable(obj, "0", "verifySetFunction1");
 
-verifyNotEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-11.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-11.js
index d23dfcde09..304b9db3bb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-11.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-11.js
@@ -41,8 +41,9 @@ verifyEqualTo(obj, "prop", getFunc());
 
 verifyWritable(obj, "prop", "verifySetFunction1");
 
-verifyNotEnumerable(obj, "prop");
-
-verifyConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-12.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-12.js
index 05a7954bab..7cac1e393e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-12.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-12.js
@@ -43,8 +43,9 @@ verifyEqualTo(obj, "0", getFunc());
 
 verifyWritable(obj, "0", "verifySetFunction1");
 
-verifyNotEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-2.js
index 6c459d0db2..2151ea314c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-2.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-2.js
@@ -42,8 +42,9 @@ verifyEqualTo(obj, "0", getFunc());
 
 verifyWritable(obj, "0", "verifySetFunction1");
 
-verifyNotEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-3.js
index 0dc6f76257..9720210f17 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-3.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-3.js
@@ -43,8 +43,9 @@ verifyEqualTo(obj, "property", getFunc());
 
 verifyWritable(obj, "property", "verifySetFunction1");
 
-verifyNotEnumerable(obj, "property");
-
-verifyConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-537.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-537.js
index e05ce8fecf..a361819a17 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-537.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-537.js
@@ -34,11 +34,11 @@ var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
 Object.defineProperty(obj, "prop", {
   configurable: false
 });
-var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
 
-verifyNotConfigurable(obj, "prop");
 assert.sameValue(desc1.configurable, true);
-assert.sameValue(desc2.configurable, false);
-assert(obj.hasOwnProperty("prop"));
+
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-1.js
index 06dd0aa4b9..340bbd5aa2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-1.js
@@ -54,8 +54,9 @@ verifyEqualTo(obj, "0", 1001);
 
 verifyNotWritable(obj, "0");
 
-verifyEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-2.js
index c1a03d0ff9..89fcca4632 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-2.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-2.js
@@ -56,8 +56,9 @@ verifyEqualTo(obj, "prop", 1001);
 
 verifyNotWritable(obj, "prop");
 
-verifyEnumerable(obj, "prop");
-
-verifyConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-5.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-5.js
index effdbc3676..146f5c421b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-5.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-5.js
@@ -55,8 +55,9 @@ verifyEqualTo(obj, "prop", 1001);
 
 verifyNotWritable(obj, "prop");
 
-verifyEnumerable(obj, "prop");
-
-verifyConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-6.js
index 4bfe9d32ee..aa286ce903 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-6.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-6.js
@@ -56,8 +56,9 @@ verifyEqualTo(obj, "0", 1001);
 
 verifyNotWritable(obj, "0");
 
-verifyEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538.js
index 8943f5cff9..89f7fbe3e5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538.js
@@ -51,8 +51,9 @@ verifyEqualTo(obj, "prop", 1001);
 
 verifyNotWritable(obj, "prop");
 
-verifyEnumerable(obj, "prop");
-
-verifyConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-54.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-54.js
index 34de6eff1d..e36e1e18ac 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-54.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-54.js
@@ -26,7 +26,9 @@ assert.sameValue(obj.property, "property");
 var desc = Object.getOwnPropertyDescriptor(obj, "property");
 assert.sameValue(typeof desc.set, "undefined");
 
-verifyNotEnumerable(obj, "property");
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-1.js
index ac2f8d5fb0..b7ccfef31f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-1.js
@@ -38,12 +38,13 @@ try {
   verifyEqualTo(obj, "property", getFunc());
 
   verifyWritable(obj, "property", "verifySetFunction");
-
-  verifyNotEnumerable(obj, "property");
-
-  verifyNotConfigurable(obj, "property");
 }
 
+verifyProperty(obj, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 try {
   Object.defineProperty(obj, "property", {
     set: function(value) {
@@ -59,14 +60,14 @@ try {
 
   verifyWritable(obj, "property", "verifySetFunction");
 
-  verifyNotEnumerable(obj, "property");
-
-  verifyNotConfigurable(obj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-2.js
index df61180433..4e2ac6db59 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-2.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-2.js
@@ -38,12 +38,13 @@ try {
   verifyEqualTo(obj, "0", getFunc());
 
   verifyWritable(obj, "0", "verifySetFunction");
-
-  verifyNotEnumerable(obj, "0");
-
-  verifyNotConfigurable(obj, "0");
 }
 
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: false,
+});
+
 try {
   Object.defineProperty(obj, "0", {
     set: function(value) {
@@ -59,14 +60,14 @@ try {
 
   verifyWritable(obj, "0", "verifySetFunction");
 
-  verifyNotEnumerable(obj, "0");
-
-  verifyNotConfigurable(obj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-3.js
index f7018700c9..1aeb2c071d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-3.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-3.js
@@ -39,12 +39,13 @@ try {
   verifyEqualTo(obj, "property", getFunc());
 
   verifyWritable(obj, "property", "verifySetFunction");
-
-  verifyNotEnumerable(obj, "property");
-
-  verifyNotConfigurable(obj, "property");
 }
 
+verifyProperty(obj, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 try {
   Object.defineProperty(obj, "property", {
     set: function(value) {
@@ -61,14 +62,14 @@ try {
 
   verifyWritable(obj, "property", "verifySetFunction");
 
-  verifyNotEnumerable(obj, "property");
-
-  verifyNotConfigurable(obj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-6.js
index 64cc3ff55f..8431a64191 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-6.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-6.js
@@ -39,12 +39,13 @@ try {
   verifyEqualTo(obj, "0", getFunc());
 
   verifyWritable(obj, "0", "verifySetFunction");
-
-  verifyNotEnumerable(obj, "0");
-
-  verifyNotConfigurable(obj, "0");
 }
 
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: false,
+});
+
 try {
   Object.defineProperty(obj, "0", {
     set: function(value) {
@@ -60,15 +61,14 @@ try {
 
   verifyWritable(obj, "0", "verifySetFunction");
 
-  verifyNotEnumerable(obj, "0");
-
-  verifyNotConfigurable(obj, "0");
-
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-7.js
index bc90c7b983..1bc3fcfa22 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-7.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-7.js
@@ -38,12 +38,13 @@ try {
   verifyEqualTo(obj, "prop", getFunc());
 
   verifyWritable(obj, "prop", "verifySetFunction");
-
-  verifyNotEnumerable(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
 }
 
+verifyProperty(obj, "prop", {
+  enumerable: false,
+  configurable: false,
+});
+
 try {
   Object.defineProperty(obj, "prop", {
     set: function(value) {
@@ -60,15 +61,14 @@ try {
 
   verifyWritable(obj, "prop", "verifySetFunction");
 
-  verifyNotEnumerable(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
-
-
   if (!(e1 instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e1);
   }
-
 }
 
+verifyProperty(obj, "prop", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-8.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-8.js
index 26be4c5177..cca11f6b53 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-8.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-8.js
@@ -40,12 +40,13 @@ try {
   verifyEqualTo(obj, "0", getFunc());
 
   verifyWritable(obj, "0", "verifySetFunction");
-
-  verifyNotEnumerable(obj, "0");
-
-  verifyNotConfigurable(obj, "0");
 }
 
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: false,
+});
+
 try {
   Object.defineProperty(obj, "0", {
     set: function(value) {
@@ -61,14 +62,14 @@ try {
 
   verifyWritable(obj, "0", "verifySetFunction");
 
-  verifyNotEnumerable(obj, "0");
-
-  verifyNotConfigurable(obj, "0");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-542.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-542.js
index 0768fd3034..d1effa9fe0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-542.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-542.js
@@ -28,7 +28,8 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-546.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-546.js
index bd266dbcb3..2cefdfbb7f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-546.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-546.js
@@ -29,6 +29,7 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.sameValue(desc1.configurable, false);
 
 try {
   Object.defineProperty(obj, "prop", {
@@ -38,12 +39,10 @@ try {
   throw new Test262Error("Expected TypeError");
 } catch (e) {
   assert(e instanceof TypeError);
-  assert.sameValue(desc1.configurable, false);
-
-  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
-  assert.sameValue(desc2.configurable, false);
-
-  verifyNotConfigurable(obj, "prop");
 }
 
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-1.js
index ae003f7fdd..24c73a6f46 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-1.js
@@ -51,15 +51,14 @@ try {
 
   verifyWritable(obj, "0", "verifySetFunc");
 
-  verifyEnumerable(obj, "0");
-
-  verifyNotConfigurable(obj, "0");
-
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "0", {
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-2.js
index 6b40da84ff..1fc93445ef 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-2.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-2.js
@@ -53,15 +53,14 @@ try {
 
   verifyWritable(obj, "prop", "verifySetFunc");
 
-  verifyEnumerable(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
-
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "prop", {
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-3.js
index db6e0fdd62..3e3815b131 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-3.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-3.js
@@ -51,14 +51,15 @@ try {
 
   verifyWritable(obj, "prop", "verifySetFunc");
 
-  verifyEnumerable(obj, "prop");
-
-  verifyNotConfigurable(obj, "prop");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
 
 }
 
+verifyProperty(obj, "prop", {
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-4.js
index ffc954933e..f5261f8ce5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-4.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-4.js
@@ -51,15 +51,14 @@ try {
 
   verifyWritable(obj, "0", "verifySetFunc");
 
-  verifyEnumerable(obj, "0");
-
-  verifyNotConfigurable(obj, "0");
-
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "0", {
+  enumerable: true,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-55.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-55.js
index ca020589dd..7fced08f66 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-55.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-55.js
@@ -28,8 +28,9 @@ verifyEqualTo(obj, "property", getFunc());
 
 verifyWritable(obj, "property", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "property");
-
-verifyConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-555.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-555.js
index 96f0f78ea5..64d8596265 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-555.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-555.js
@@ -36,6 +36,8 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-56.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-56.js
index c5ea0ffad5..004dc7e27a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-56.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-56.js
@@ -27,8 +27,9 @@ verifyEqualTo(obj, "property", getFunc());
 
 verifyWritable(obj, "property", "setVerifyHelpProp");
 
-verifyEnumerable(obj, "property");
-
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-560.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-560.js
index 127e3d4d42..ce9172ee37 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-560.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-560.js
@@ -28,7 +28,8 @@ Object.defineProperty(obj, "prop", {
   configurable: false
 });
 
-assert(obj.hasOwnProperty("prop"));
-verifyNotConfigurable(obj, "prop");
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-564.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-564.js
index b4d0e29416..24c6c00d0b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-564.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-564.js
@@ -28,7 +28,6 @@ Object.defineProperty(obj, "prop", {
   enumerable: false,
   configurable: false
 });
-var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
 
 try {
   Object.defineProperty(obj, "prop", {
@@ -38,8 +37,10 @@ try {
   throw new Test262Error("Expected TypeError");
 } catch (e) {
   assert(e instanceof TypeError);
-  assert.sameValue(desc1.configurable, false);
-  verifyNotConfigurable(obj, "prop");
 }
 
+verifyProperty(obj, "prop", {
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-57.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-57.js
index 5ad316ca51..3d010a65ec 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-57.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-57.js
@@ -37,8 +37,9 @@ verifyEqualTo(obj, "property", getFunc());
 
 verifyWritable(obj, "property", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "property");
-
-verifyNotConfigurable(obj, "property");
+verifyProperty(obj, "property", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-58.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-58.js
index d561f384f6..0e63b0085c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-58.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-58.js
@@ -15,12 +15,12 @@ var obj = {};
 obj.foo = 101; // default value of attributes: writable: true, configurable: true, enumerable: true
 
 Object.defineProperty(obj, "foo", {});
-verifyEqualTo(obj, "foo", 101);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 101,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-59.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-59.js
index 903ac63326..6621860c56 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-59.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-59.js
@@ -30,8 +30,9 @@ verifyEqualTo(obj, "foo", getFunc());
 
 verifyWritable(obj, "foo", "helpVerifySet");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-60.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-60.js
index bb14e77bed..58699274f6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-60.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-60.js
@@ -17,12 +17,12 @@ obj.foo = 101; // default value of attributes: writable: true, configurable: tru
 Object.defineProperty(obj, "foo", {
   value: "abc"
 });
-verifyEqualTo(obj, "foo", "abc");
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: "abc",
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-61.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-61.js
index a59d8e6098..6e9ca52710 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-61.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-61.js
@@ -19,12 +19,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   value: undefined
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-611.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-611.js
index 19c0ef715c..29f1c7b0e6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-611.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-611.js
@@ -6,33 +6,13 @@ es5id: 15.2.3.6-4-611
 description: >
     ES5 Attributes - all attributes in Function.prototype.bind are
     correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Function.prototype, "bind");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Function.prototype.bind;
-
-Function.prototype.bind = "2010";
-
-var isWritable = (Function.prototype.bind === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Function.prototype) {
-  if (prop === "bind") {
-    isEnumerable = true;
-  }
-}
-
-delete Function.prototype.bind;
-
-var isConfigurable = !Function.prototype.hasOwnProperty("bind");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Function.prototype, "bind", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-612.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-612.js
index e33d81a9c2..5669e33ad1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-612.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-612.js
@@ -6,33 +6,13 @@ es5id: 15.2.3.6-4-612
 description: >
     ES5 Attributes - all attributes in Array.prototype.indexOf are
     correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Array.prototype, "indexOf");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Array.prototype.indexOf;
-
-Array.prototype.indexOf = "2010";
-
-var isWritable = (Array.prototype.indexOf === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Array.prototype) {
-  if (prop === "indexOf") {
-    isEnumerable = true;
-  }
-}
-
-delete Array.prototype.indexOf;
-
-var isConfigurable = !Array.prototype.hasOwnProperty("indexOf");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Array.prototype, "indexOf", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-613.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-613.js
index 162333109f..3be61c6ded 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-613.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-613.js
@@ -4,33 +4,13 @@
 /*---
 es5id: 15.2.3.6-4-613
 description: ES5 Attributes - all attributes in Object.lastIndexOf are correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Array.prototype, "lastIndexOf");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Array.prototype.lastIndexOf;
-
-Array.prototype.lastIndexOf = "2010";
-
-var isWritable = (Array.prototype.lastIndexOf === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Array.prototype) {
-  if (prop === "lastIndexOf") {
-    isEnumerable = true;
-  }
-}
-
-delete Array.prototype.lastIndexOf;
-
-var isConfigurable = !Array.prototype.hasOwnProperty("lastIndexOf");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Array.prototype, "lastIndexOf", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-614.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-614.js
index 368a3b8977..b4017c499c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-614.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-614.js
@@ -6,33 +6,13 @@ es5id: 15.2.3.6-4-614
 description: >
     ES5 Attributes - all attributes in Array.prototype.every are
     correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Array.prototype, "every");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Array.prototype.every;
-
-Array.prototype.every = "2010";
-
-var isWritable = (Array.prototype.every === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Array.prototype) {
-  if (prop === "every") {
-    isEnumerable = true;
-  }
-}
-
-delete Array.prototype.every;
-
-var isConfigurable = !Array.prototype.hasOwnProperty("every");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Array.prototype, "every", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-615.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-615.js
index c4deed0cd6..de306634f0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-615.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-615.js
@@ -4,33 +4,13 @@
 /*---
 es5id: 15.2.3.6-4-615
 description: ES5 Attributes - all attributes in Array.prototype.some are correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Array.prototype, "some");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Array.prototype.some;
-
-Array.prototype.some = "2010";
-
-var isWritable = (Array.prototype.some === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Array.prototype) {
-  if (prop === "some") {
-    isEnumerable = true;
-  }
-}
-
-delete Array.prototype.some;
-
-var isConfigurable = !Array.prototype.hasOwnProperty("some");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Array.prototype, "some", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-616.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-616.js
index d5547bda86..a55fea0497 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-616.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-616.js
@@ -6,33 +6,13 @@ es5id: 15.2.3.6-4-616
 description: >
     ES5 Attributes - all attributes in Array.prototype.forEach are
     correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Array.prototype, "forEach");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Array.prototype.forEach;
-
-Array.prototype.forEach = "2010";
-
-var isWritable = (Array.prototype.forEach === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Array.prototype) {
-  if (prop === "forEach") {
-    isEnumerable = true;
-  }
-}
-
-delete Array.prototype.forEach;
-
-var isConfigurable = !Array.prototype.hasOwnProperty("forEach");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Array.prototype, "forEach", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-617.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-617.js
index 0d18438ceb..a2ba3ab540 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-617.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-617.js
@@ -4,33 +4,13 @@
 /*---
 es5id: 15.2.3.6-4-617
 description: ES5 Attributes - all attributes in Array.prototype.map are correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Array.prototype, "map");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Array.prototype.map;
-
-Array.prototype.map = "2010";
-
-var isWritable = (Array.prototype.map === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Array.prototype) {
-  if (prop === "map") {
-    isEnumerable = true;
-  }
-}
-
-delete Array.prototype.map;
-
-var isConfigurable = !Array.prototype.hasOwnProperty("map");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Array.prototype, "map", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-618.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-618.js
index 3e21462908..8b7d744743 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-618.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-618.js
@@ -6,33 +6,13 @@ es5id: 15.2.3.6-4-618
 description: >
     ES5 Attributes - all attributes in Array.prototype.filter are
     correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Array.prototype, "filter");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Array.prototype.filter;
-
-Array.prototype.filter = "2010";
-
-var isWritable = (Array.prototype.filter === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Array.prototype) {
-  if (prop === "filter") {
-    isEnumerable = true;
-  }
-}
-
-delete Array.prototype.filter;
-
-var isConfigurable = !Array.prototype.hasOwnProperty("filter");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Array.prototype, "filter", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-619.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-619.js
index 746209ea13..2bc25fcfe4 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-619.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-619.js
@@ -6,33 +6,13 @@ es5id: 15.2.3.6-4-619
 description: >
     ES5 Attributes - all attributes in Array.prototype.reduce are
     correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Array.prototype, "reduce");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Array.prototype.reduce;
-
-Array.prototype.reduce = "2010";
-
-var isWritable = (Array.prototype.reduce === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Array.prototype) {
-  if (prop === "reduce") {
-    isEnumerable = true;
-  }
-}
-
-delete Array.prototype.reduce;
-
-var isConfigurable = !Array.prototype.hasOwnProperty("reduce");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Array.prototype, "reduce", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-62.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-62.js
index f16d18a98b..4faabfad64 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-62.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-62.js
@@ -19,12 +19,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   value: null
 });
-verifyEqualTo(obj, "foo", null);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: null,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-620.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-620.js
index 6ce2dbb7ce..d20710fc44 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-620.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-620.js
@@ -6,33 +6,13 @@ es5id: 15.2.3.6-4-620
 description: >
     ES5 Attributes - all attributes in Array.prototype.reduceRight are
     correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Array.prototype, "reduceRight");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Array.prototype.reduceRight;
-
-Array.prototype.reduceRight = "2010";
-
-var isWritable = (Array.prototype.reduceRight === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Array.prototype) {
-  if (prop === "reduceRight") {
-    isEnumerable = true;
-  }
-}
-
-delete Array.prototype.reduceRight;
-
-var isConfigurable = !Array.prototype.hasOwnProperty("reduceRight");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Array.prototype, "reduceRight", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-621.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-621.js
index 5e00e1db4f..9bd87e96e3 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-621.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-621.js
@@ -6,33 +6,13 @@ es5id: 15.2.3.6-4-621
 description: >
     ES5 Attributes - all attributes in String.prototype.trim are
     correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(String.prototype, "trim");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = String.prototype.trim;
-
-String.prototype.trim = "2010";
-
-var isWritable = (String.prototype.trim === "2010");
-
-var isEnumerable = false;
-
-for (var prop in String.prototype) {
-  if (prop === "trim") {
-    isEnumerable = true;
-  }
-}
-
-delete String.prototype.trim;
-
-var isConfigurable = !String.prototype.hasOwnProperty("trim");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(String.prototype, "trim", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-622.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-622.js
index db59aba810..fe21ad4d58 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-622.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-622.js
@@ -4,33 +4,14 @@
 /*---
 es5id: 15.2.3.6-4-622
 description: ES5 Attributes - all attributes in Date.now are correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Date, "now");
+verifyProperty(Date, "now", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Date.now;
-
-Date.now = "2010";
-
-var isWritable = (Date.now === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Date) {
-  if (prop === "now") {
-    isEnumerable = true;
-  }
-}
-
-delete Date.now;
-
-var isConfigurable = !Date.hasOwnProperty("now");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-623.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-623.js
index a5c94f29b7..b314bc2c50 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-623.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-623.js
@@ -6,33 +6,13 @@ es5id: 15.2.3.6-4-623
 description: >
     ES5 Attributes - all attributes in Date.prototype.toISOString are
     correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Date.prototype, "toISOString");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Date.prototype.toISOString;
-
-Date.prototype.toISOString = "2010";
-
-var isWritable = (Date.prototype.toISOString === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Date.prototype) {
-  if (prop === "toISOString") {
-    isEnumerable = true;
-  }
-}
-
-delete Date.prototype.toISOString;
-
-var isConfigurable = !Date.prototype.hasOwnProperty("toISOString");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Date.prototype, "toISOString", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-624.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-624.js
index 4774991788..e2362387ca 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-624.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-624.js
@@ -6,33 +6,13 @@ es5id: 15.2.3.6-4-624
 description: >
     ES5 Attributes - all attributes in Date.prototype.toJSON are
     correct
+includes: [propertyHelper.js]
 ---*/
 
-var desc = Object.getOwnPropertyDescriptor(Date.prototype, "toJSON");
-
-var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
-
-var temp = Date.prototype.toJSON;
-
-Date.prototype.toJSON = "2010";
-
-var isWritable = (Date.prototype.toJSON === "2010");
-
-var isEnumerable = false;
-
-for (var prop in Date.prototype) {
-  if (prop === "toJSON") {
-    isEnumerable = true;
-  }
-}
-
-delete Date.prototype.toJSON;
-
-var isConfigurable = !Date.prototype.hasOwnProperty("toJSON");
-
-assert(propertyAreCorrect, 'propertyAreCorrect !== true');
-assert(isWritable, 'isWritable !== true');
-assert.sameValue(isEnumerable, false, 'isEnumerable');
-assert(isConfigurable, 'isConfigurable !== true');
+verifyProperty(Date.prototype, "toJSON", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-63.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-63.js
index feaf556cef..e92be049d0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-63.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-63.js
@@ -19,12 +19,11 @@ Object.defineProperty(obj, "foo", {
   value: NaN
 });
 
-assert.sameValue(obj.foo, NaN);
-
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: NaN,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-64.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-64.js
index d627e8a13f..53599d36c6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-64.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-64.js
@@ -23,18 +23,16 @@ try {
   throw new Test262Error("Expected an exception.");
 } catch (e) {
 
-  verifyEqualTo(obj, "foo", -0);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: -0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-65.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-65.js
index ed2ac2cc12..f0abc12984 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-65.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-65.js
@@ -22,18 +22,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", +0);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: +0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-66.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-66.js
index 87fe39bdbd..3339c81706 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-66.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-66.js
@@ -17,12 +17,12 @@ obj.foo = 101; // default value of attributes: writable: true, configurable: tru
 Object.defineProperty(obj, "foo", {
   value: 102
 });
-verifyEqualTo(obj, "foo", 102);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 102,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-67.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-67.js
index 6778b65e76..ab0c3fce02 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-67.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-67.js
@@ -20,12 +20,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   value: "abcd"
 });
-verifyEqualTo(obj, "foo", "abcd");
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: "abcd",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-68.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-68.js
index f3f74ca0b1..e914ee7275 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-68.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-68.js
@@ -17,12 +17,12 @@ obj.foo = "abcd"; // default value of attributes: writable: true, configurable:
 Object.defineProperty(obj, "foo", {
   value: "fghj"
 });
-verifyEqualTo(obj, "foo", "fghj");
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: "fghj",
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-69.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-69.js
index 39244aa40a..682db19208 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-69.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-69.js
@@ -19,12 +19,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   value: true
 });
-verifyEqualTo(obj, "foo", true);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: true,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-70.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-70.js
index 24d4977637..c431b43b55 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-70.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-70.js
@@ -17,12 +17,12 @@ obj.foo = true; // default value of attributes: writable: true, configurable: tr
 Object.defineProperty(obj, "foo", {
   value: false
 });
-verifyEqualTo(obj, "foo", false);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: false,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-71.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-71.js
index c12aa123b1..146f1b2a92 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-71.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-71.js
@@ -23,12 +23,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   value: obj1
 });
-verifyEqualTo(obj, "foo", obj1);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-72.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-72.js
index 36c4fe3a34..2e10a620e6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-72.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-72.js
@@ -24,12 +24,12 @@ var obj2 = {
 Object.defineProperty(obj, "foo", {
   value: obj2
 });
-verifyEqualTo(obj, "foo", obj2);
 
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: obj2,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-73.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-73.js
index e003f7060f..19ee10354a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-73.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-73.js
@@ -19,12 +19,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   writable: false
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-74.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-74.js
index 735ff9e36d..a711a14148 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-74.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-74.js
@@ -20,12 +20,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   writable: true
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-75.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-75.js
index ffb8fa59fc..b51fe84c77 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-75.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-75.js
@@ -32,8 +32,9 @@ verifyEqualTo(obj, "foo", getFunc());
 
 verifyWritable(obj, "foo", "helpVerifySet");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-76.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-76.js
index 91a011f019..b6b16ff6ac 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-76.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-76.js
@@ -37,8 +37,9 @@ verifyEqualTo(obj, "foo", getFunc2());
 
 verifyWritable(obj, "foo", "helpVerifySet");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-77.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-77.js
index 11813c0338..6e9275c910 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-77.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-77.js
@@ -25,8 +25,9 @@ Object.defineProperty(obj, "foo", {
 });
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-78.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-78.js
index 9ffdeb435b..7be495b41e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-78.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-78.js
@@ -28,8 +28,9 @@ Object.defineProperty(obj, "foo", {
 });
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-79.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-79.js
index 0295f90eef..f82e5431b1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-79.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-79.js
@@ -19,12 +19,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   enumerable: false
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-80.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-80.js
index 06c6f05859..f2595e67e6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-80.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-80.js
@@ -20,12 +20,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   enumerable: true
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-81.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-81.js
index bb04cb882d..88b4844633 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-81.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-81.js
@@ -19,12 +19,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   configurable: false
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-1.js
index b2a9b4b8ae..c5dfda4bc9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-1.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-1.js
@@ -27,12 +27,11 @@ Object.defineProperty(obj, "foo", {
   enumerable: false
 });
 
-verifyEqualTo(obj, "foo", 1001);
-
-verifyWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-10.js
index 4c2395e14d..ac6298f340 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-10.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-10.js
@@ -38,8 +38,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "verifySetFunction");
 
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-11.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-11.js
index 0fefd5de68..416f684952 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-11.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-11.js
@@ -38,8 +38,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "verifySetFunction");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-12.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-12.js
index ba8dd041b1..14e09775c2 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-12.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-12.js
@@ -37,8 +37,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "verifySetFunction");
 
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-13.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-13.js
index 4e954f0939..0e3cd8165c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-13.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-13.js
@@ -27,12 +27,11 @@ Object.defineProperty(obj, "0", {
   enumerable: false
 });
 
-verifyEqualTo(obj, "0", 1001);
-
-verifyWritable(obj, "0");
-
-verifyNotEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-14.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-14.js
index b91f538d57..3f21dbcd94 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-14.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-14.js
@@ -28,12 +28,11 @@ Object.defineProperty(obj, "0", {
   configurable: true
 });
 
-verifyEqualTo(obj, "0", 1001);
-
-verifyWritable(obj, "0");
-
-verifyNotEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-15.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-15.js
index 5a88b4781c..49d20e8780 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-15.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-15.js
@@ -26,12 +26,11 @@ Object.defineProperty(obj, "0", {
   configurable: false
 });
 
-verifyEqualTo(obj, "0", 1001);
-
-verifyWritable(obj, "0");
-
-verifyEnumerable(obj, "0");
-
-verifyNotConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-16.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-16.js
index fe07c56e74..b22ff1fb7c 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-16.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-16.js
@@ -28,12 +28,11 @@ Object.defineProperty(obj, "0", {
   configurable: false
 });
 
-verifyEqualTo(obj, "0", 1001);
-
-verifyWritable(obj, "0");
-
-verifyEnumerable(obj, "0");
-
-verifyNotConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-17.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-17.js
index de43ae8048..acac52e8c1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-17.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-17.js
@@ -28,12 +28,11 @@ Object.defineProperty(obj, "0", {
   configurable: false
 });
 
-verifyEqualTo(obj, "0", 1001);
-
-verifyWritable(obj, "0");
-
-verifyNotEnumerable(obj, "0");
-
-verifyNotConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-18.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-18.js
index 30b44c922c..063c7d48a1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-18.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-18.js
@@ -27,12 +27,11 @@ Object.defineProperty(obj, "0", {
   enumerable: true
 });
 
-verifyEqualTo(obj, "0", 1001);
-
-verifyWritable(obj, "0");
-
-verifyEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-19.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-19.js
index b8776f7da0..894860a0a6 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-19.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-19.js
@@ -37,8 +37,9 @@ verifyEqualTo(obj, "0", get_func());
 
 verifyWritable(obj, "0", "verifySetFunction");
 
-verifyNotEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-2.js
index e5093aeec7..0c3c12cb09 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-2.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-2.js
@@ -28,12 +28,11 @@ Object.defineProperty(obj, "foo", {
   configurable: true
 });
 
-verifyEqualTo(obj, "foo", 1001);
-
-verifyWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-20.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-20.js
index 4b4ee70a99..d05a255134 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-20.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-20.js
@@ -38,8 +38,9 @@ verifyEqualTo(obj, "0", get_func());
 
 verifyWritable(obj, "0", "verifySetFunction");
 
-verifyNotEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-21.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-21.js
index f4d984ef54..c3f45f0fb5 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-21.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-21.js
@@ -37,8 +37,9 @@ verifyEqualTo(obj, "0", get_func());
 
 verifyWritable(obj, "0", "verifySetFunction");
 
-verifyEnumerable(obj, "0");
-
-verifyNotConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-22.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-22.js
index 4df84cf130..88c4a33a60 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-22.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-22.js
@@ -38,8 +38,9 @@ verifyEqualTo(obj, "0", get_func());
 
 verifyWritable(obj, "0", "verifySetFunction");
 
-verifyEnumerable(obj, "0");
-
-verifyNotConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-23.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-23.js
index a313d8ed02..8c9693671f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-23.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-23.js
@@ -38,8 +38,9 @@ verifyEqualTo(obj, "0", get_func());
 
 verifyWritable(obj, "0", "verifySetFunction");
 
-verifyNotEnumerable(obj, "0");
-
-verifyNotConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-24.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-24.js
index fd2e6d537b..199a0c8f9e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-24.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-24.js
@@ -37,8 +37,9 @@ verifyEqualTo(obj, "0", get_func());
 
 verifyWritable(obj, "0", "verifySetFunction");
 
-verifyEnumerable(obj, "0");
-
-verifyConfigurable(obj, "0");
+verifyProperty(obj, "0", {
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-3.js
index f031e54a38..083cd2a349 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-3.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-3.js
@@ -26,12 +26,11 @@ Object.defineProperty(obj, "foo", {
   configurable: false
 });
 
-verifyEqualTo(obj, "foo", 1001);
-
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-4.js
index 9e6bd3600a..341f8055ba 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-4.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-4.js
@@ -28,12 +28,11 @@ Object.defineProperty(obj, "foo", {
   configurable: false
 });
 
-verifyEqualTo(obj, "foo", 1001);
-
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-5.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-5.js
index d0dae554c5..431ae80ae1 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-5.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-5.js
@@ -28,12 +28,11 @@ Object.defineProperty(obj, "foo", {
   configurable: false
 });
 
-verifyEqualTo(obj, "foo", 1001);
-
-verifyWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-6.js
index 265df4a1bb..c5821b1bba 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-6.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-6.js
@@ -27,12 +27,11 @@ Object.defineProperty(obj, "foo", {
   enumerable: true
 });
 
-verifyEqualTo(obj, "foo", 1001);
-
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-7.js
index 72e6355d42..d41b441ab0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-7.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-7.js
@@ -37,8 +37,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "verifySetFunction");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-8.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-8.js
index 1238652846..3404e81fe0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-8.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-8.js
@@ -38,8 +38,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "verifySetFunction");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-9.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-9.js
index 7f7b8b7a1d..e8a7bdfb6e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-9.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-9.js
@@ -37,8 +37,9 @@ verifyEqualTo(obj, "foo", get_func());
 
 verifyWritable(obj, "foo", "verifySetFunction");
 
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82.js
index f80c1afff1..961ee791bb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82.js
@@ -19,12 +19,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   configurable: false
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-83.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-83.js
index c9fb22b3d7..34d5c23c1f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-83.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-83.js
@@ -24,12 +24,12 @@ Object.defineProperty(obj, "foo", {
   writable: false,
   configurable: false
 });
-verifyEqualTo(obj, "foo", undefined);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-84.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-84.js
index fdb49395ee..cd1857b57f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-84.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-84.js
@@ -24,12 +24,12 @@ Object.defineProperty(obj, "foo", {
   writable: false,
   configurable: false
 });
-verifyEqualTo(obj, "foo", null);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: null,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-85.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-85.js
index 882a018143..077358427d 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-85.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-85.js
@@ -24,12 +24,11 @@ Object.defineProperty(obj, "foo", {
   configurable: false
 });
 
-assert.sameValue(obj.foo, NaN);
-
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: NaN,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-86.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-86.js
index 1bf35f3460..e06026db5f 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-86.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-86.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", -0);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: -0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-87.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-87.js
index cbf3421f4e..bb440cdfab 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-87.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-87.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", +0);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: +0,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-88.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-88.js
index 27b56ee337..acf4b9ef0b 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-88.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-88.js
@@ -23,12 +23,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   value: 100
 });
-verifyEqualTo(obj, "foo", 100);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 100,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-89.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-89.js
index a8b3ba707f..c2486ea1c9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-89.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-89.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", 10);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-90.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-90.js
index 07438a7406..e5909987a0 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-90.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-90.js
@@ -23,12 +23,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   value: "abcd"
 });
-verifyEqualTo(obj, "foo", "abcd");
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: "abcd",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-91.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-91.js
index 665ae48b79..b8b341634e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-91.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-91.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", "abcd");
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: "abcd",
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-92.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-92.js
index 780ad68e54..5eea0ded00 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-92.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-92.js
@@ -23,12 +23,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   value: false
 });
-verifyEqualTo(obj, "foo", false);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: false,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-93.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-93.js
index 27113a056f..ae20af55cb 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-93.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-93.js
@@ -25,18 +25,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", false);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: false,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-94.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-94.js
index 6a3a90950d..62816a425e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-94.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-94.js
@@ -27,12 +27,12 @@ Object.defineProperty(obj, "foo", {
 Object.defineProperty(obj, "foo", {
   value: obj1
 });
-verifyEqualTo(obj, "foo", obj1);
 
-verifyNotWritable(obj, "foo");
-
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-95.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-95.js
index 9590be199b..d88f1f6a86 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-95.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-95.js
@@ -34,18 +34,16 @@ try {
   });
   throw new Test262Error("Expected an exception.");
 } catch (e) {
-  verifyEqualTo(obj, "foo", obj1);
-
-  verifyNotWritable(obj, "foo");
-
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  value: obj1,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-96.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-96.js
index 6cc17c467e..f0629223d7 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-96.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-96.js
@@ -27,8 +27,9 @@ Object.defineProperty(obj, "foo", {
 });
 verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-97.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-97.js
index 6e3d07a24b..8a5ada0331 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-97.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-97.js
@@ -33,14 +33,14 @@ try {
 } catch (e) {
   verifyEqualTo(obj, "property", getFunc());
 
-  verifyNotEnumerable(obj, "property");
-
-  verifyNotConfigurable(obj, "property");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "property", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-98.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-98.js
index 0b54b241d5..99cd678b2a 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-98.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-98.js
@@ -35,8 +35,9 @@ verifyEqualTo(obj, "foo", getFunc());
 
 verifyWritable(obj, "foo", "verifyGetHelpMethod");
 
-verifyNotEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-99.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-99.js
index bc8efa7208..2d0cd0e7da 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-99.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-99.js
@@ -35,14 +35,14 @@ try {
 } catch (e) {
   verifyWritable(obj, "foo", "setVerifyHelpProp");
 
-  verifyNotEnumerable(obj, "foo");
-
-  verifyNotConfigurable(obj, "foo");
-
   if (!(e instanceof TypeError)) {
     throw new Test262Error("Expected TypeError, got " + e);
   }
-
 }
 
+verifyProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false,
+});
+
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/name.js b/js/src/tests/test262/built-ins/Object/defineProperty/name.js
index 93e3066236..277210934e 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/name.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.defineProperty.name, "defineProperty");
-
-verifyNotEnumerable(Object.defineProperty, "name");
-verifyNotWritable(Object.defineProperty, "name");
-verifyConfigurable(Object.defineProperty, "name");
+verifyProperty(Object.defineProperty, "name", {
+  value: "defineProperty",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/defineProperty/not-a-constructor.js
index 8c49a7085c..4b5af11af9 100644
--- a/js/src/tests/test262/built-ins/Object/defineProperty/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.defineProperty({}, '', {});
-}, '`new Object.defineProperty({}, \'\', {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/entries/function-length.js b/js/src/tests/test262/built-ins/Object/entries/function-length.js
index 6510ac12b6..297c3acb8b 100644
--- a/js/src/tests/test262/built-ins/Object/entries/function-length.js
+++ b/js/src/tests/test262/built-ins/Object/entries/function-length.js
@@ -8,10 +8,11 @@ author: Jordan Harband
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.entries.length, 1, 'Expected Object.entries.length to be 1');
-
-verifyNotEnumerable(Object.entries, 'length');
-verifyNotWritable(Object.entries, 'length');
-verifyConfigurable(Object.entries, 'length');
+verifyProperty(Object.entries, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/entries/function-name.js b/js/src/tests/test262/built-ins/Object/entries/function-name.js
index ddc50048d8..981386649c 100644
--- a/js/src/tests/test262/built-ins/Object/entries/function-name.js
+++ b/js/src/tests/test262/built-ins/Object/entries/function-name.js
@@ -8,14 +8,11 @@ author: Jordan Harband
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Object.entries.name,
-  'entries',
-  'Expected Object.entries.name to be "entries"'
-);
-
-verifyNotEnumerable(Object.entries, 'name');
-verifyNotWritable(Object.entries, 'name');
-verifyConfigurable(Object.entries, 'name');
+verifyProperty(Object.entries, "name", {
+  value: "entries",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/entries/function-property-descriptor.js b/js/src/tests/test262/built-ins/Object/entries/function-property-descriptor.js
index a1ed98ba44..35bb70debf 100644
--- a/js/src/tests/test262/built-ins/Object/entries/function-property-descriptor.js
+++ b/js/src/tests/test262/built-ins/Object/entries/function-property-descriptor.js
@@ -8,8 +8,10 @@ author: Jordan Harband
 includes: [propertyHelper.js]
 ---*/
 
-verifyNotEnumerable(Object, 'entries');
-verifyWritable(Object, 'entries');
-verifyConfigurable(Object, 'entries');
+verifyProperty(Object, "entries", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/entries/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/entries/not-a-constructor.js
index cab5f1d2e6..5c53c08703 100644
--- a/js/src/tests/test262/built-ins/Object/entries/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/entries/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.entries), false, 'isConstructor(Object.ent
 
 assert.throws(TypeError, () => {
   new Object.entries({});
-}, '`new Object.entries({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-4.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-4.js
index d1c0131160..812183048a 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-4.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-4.js
@@ -17,8 +17,9 @@ Object.defineProperty(obj, "foo", {
 
 Object.freeze(obj);
 
-assert(obj.hasOwnProperty("foo"));
-verifyNotWritable(obj, "foo");
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-1.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-1.js
index a03d148d17..49575f4042 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-1.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-1.js
@@ -13,9 +13,10 @@ obj.foo = 10; // default [[Configurable]] attribute value of foo: true
 
 Object.freeze(obj);
 
-verifyNotWritable(obj, "foo");
-verifyNotConfigurable(obj, "foo");
-
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-10.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-10.js
index ac66e48f32..4f8efb99c8 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-10.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-10.js
@@ -15,9 +15,10 @@ arrObj.foo = 10; // default [[Configurable]] attribute value of foo: true
 
 Object.freeze(arrObj);
 
-verifyNotWritable(arrObj, "foo");
-verifyNotConfigurable(arrObj, "foo");
-
-assert.sameValue(arrObj.foo, 10);
+verifyProperty(arrObj, "foo", {
+  value: 10,
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-11.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-11.js
index b9db664525..4e4fe8ac10 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-11.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-11.js
@@ -17,10 +17,10 @@ var argObj = (function() {
 
 Object.freeze(argObj);
 
-var desc = Object.getOwnPropertyDescriptor(argObj, "0");
-
-verifyNotWritable(argObj, "0");
-verifyNotConfigurable(argObj, "0");
-assert.sameValue(argObj[0], 1);
+verifyProperty(argObj, "0", {
+  value: 1,
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-12.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-12.js
index 1eb5dbbc11..4072d7b0f1 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-12.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-12.js
@@ -15,9 +15,10 @@ var strObj = new String("abc");
 
 Object.freeze(strObj);
 
-verifyNotWritable(strObj, "0");
-verifyNotConfigurable(strObj, "0");
-
-assert.sameValue(strObj[0], "a");
+verifyProperty(strObj, "0", {
+  value: "a",
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-13.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-13.js
index c4d1fa96be..41ce47b491 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-13.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-13.js
@@ -17,9 +17,10 @@ var obj = {
 
 Object.freeze(obj);
 
-verifyNotWritable(obj, "0");
-verifyNotConfigurable(obj, "0");
-
-assert.sameValue(obj[0], 0);
+verifyProperty(obj, "0", {
+  value: 0,
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-14.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-14.js
index eecc860739..f14cf55984 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-14.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-14.js
@@ -14,8 +14,10 @@ var arrObj = [0, 1, 2];
 
 Object.freeze(arrObj);
 
-verifyNotWritable(arrObj, "0");
-verifyNotConfigurable(arrObj, "0");
-assert.sameValue(arrObj[0], 0);
+verifyProperty(arrObj, "0", {
+  value: 0,
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-2.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-2.js
index 3bf26de301..94daf9f243 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-2.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-2.js
@@ -23,9 +23,10 @@ child.foo = 10; // default [[Configurable]] attribute value of foo: true
 
 Object.freeze(child);
 
-verifyNotWritable(child, "foo");
-verifyNotConfigurable(child, "foo");
-
-assert.sameValue(child.foo, 10);
+verifyProperty(child, "foo", {
+  value: 10,
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-3.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-3.js
index 9e70497f78..00faf0bfc8 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-3.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-3.js
@@ -29,8 +29,10 @@ Object.defineProperty(child, "foo", {
 
 Object.freeze(child);
 
-verifyNotWritable(child, "foo");
-verifyNotConfigurable(child, "foo");
-assert.sameValue(child.foo, 10);
+verifyProperty(child, "foo", {
+  value: 10,
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-4.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-4.js
index acdfed7f01..be1ed8c528 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-4.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-4.js
@@ -18,7 +18,10 @@ Object.defineProperty(obj, "foo", {
 
 Object.freeze(obj);
 
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  configurable: false,
+});
+
 assert.sameValue(obj.foo, 10);
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-5.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-5.js
index 00ff5bfc63..f08d411009 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-5.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-5.js
@@ -28,7 +28,10 @@ Object.defineProperty(child, "foo", {
 
 Object.freeze(child);
 
-verifyNotConfigurable(child, "foo");
+verifyProperty(child, "foo", {
+  configurable: false,
+});
+
 assert.sameValue(child.foo, 10);
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-6.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-6.js
index 163d0a951e..a1e8b22dac 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-6.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-6.js
@@ -32,7 +32,10 @@ Object.defineProperty(child, "foo", {
 
 Object.freeze(child);
 
-verifyNotConfigurable(child, "foo");
+verifyProperty(child, "foo", {
+  configurable: false,
+});
+
 assert.sameValue(child.foo, 10);
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-7.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-7.js
index c8de353b20..5243d62cec 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-7.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-7.js
@@ -17,8 +17,10 @@ argObj.foo = 10; // default [[Configurable]] attribute value of foo: true
 
 Object.freeze(argObj);
 
-verifyNotWritable(argObj, "foo");
-verifyNotConfigurable(argObj, "foo");
-assert.sameValue(argObj.foo, 10);
+verifyProperty(argObj, "foo", {
+  value: 10,
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-8.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-8.js
index f930bdee5f..d7eabe58ec 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-8.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-8.js
@@ -15,8 +15,10 @@ strObj.foo = 10; // default [[Configurable]] attribute value of foo: true
 
 Object.freeze(strObj);
 
-verifyNotWritable(strObj, "foo");
-verifyNotConfigurable(strObj, "foo");
-assert.sameValue(strObj.foo, 10);
+verifyProperty(strObj, "foo", {
+  value: 10,
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-9.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-9.js
index 2d2c722646..f79a8ba921 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-9.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-a-9.js
@@ -15,9 +15,10 @@ funObj.foo = 10; // default [[Configurable]] attribute value of foo: true
 
 Object.freeze(funObj);
 
-verifyNotWritable(funObj, "foo");
-verifyNotConfigurable(funObj, "foo");
-
-assert.sameValue(funObj.foo, 10);
+verifyProperty(funObj, "foo", {
+  value: 10,
+  writable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-b-i-1.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-b-i-1.js
index 4c6c953c7b..26e0c0cb37 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-b-i-1.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-b-i-1.js
@@ -19,22 +19,12 @@ Object.defineProperty(obj, "foo", {
 });
 
 Object.freeze(obj);
-var desc = Object.getOwnPropertyDescriptor(obj, "foo");
 
-verifyEqualTo(obj, "foo", 10);
-
-verifyNotWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
-
-if (desc.writable !== false) {
-  throw new Test262Error('Expected desc.writable === false, actually ' + desc.writable);
-}
-
-if (desc.configurable !== false) {
-  throw new Test262Error('Expected desc.configurable === false, actually ' + desc.configurable);
-}
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-b-i-2.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-b-i-2.js
index 2d8a00a53b..bb6fd6bcf2 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-b-i-2.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-b-i-2.js
@@ -28,39 +28,18 @@ Object.defineProperty(obj, "foo2", {
 
 Object.freeze(obj);
 
-var desc1 = Object.getOwnPropertyDescriptor(obj, "foo1");
-var desc2 = Object.getOwnPropertyDescriptor(obj, "foo2");
-
-verifyEqualTo(obj, "foo1", 10);
-
-verifyNotWritable(obj, "foo1");
-
-verifyEnumerable(obj, "foo1");
-
-verifyNotConfigurable(obj, "foo1");
-
-verifyEqualTo(obj, "foo2", 20);
-
-verifyNotWritable(obj, "foo2");
-
-verifyNotEnumerable(obj, "foo2");
-
-verifyNotConfigurable(obj, "foo2");
-
-if (desc1.configurable !== false) {
-  throw new Test262Error('Expected desc1.configurable === false, actually ' + desc1.configurable);
-}
-
-if (desc1.writable !== false) {
-  throw new Test262Error('Expected desc1.writable === false, actually ' + desc1.writable);
-}
-
-if (desc2.configurable !== false) {
-  throw new Test262Error('Expected desc2.configurable === false, actually ' + desc2.configurable);
-}
+verifyProperty(obj, "foo1", {
+  value: 10,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
-if (desc2.writable !== false) {
-  throw new Test262Error('Expected desc2.writable === false, actually ' + desc2.writable);
-}
+verifyProperty(obj, "foo2", {
+  value: 20,
+  writable: false,
+  enumerable: false,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-1.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-1.js
index 219519195c..4969d18425 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-1.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-1.js
@@ -21,21 +21,11 @@ Object.defineProperty(obj, "foo", {
 
 Object.freeze(obj);
 
-var desc = Object.getOwnPropertyDescriptor(obj, "foo");
-
-if (desc.configurable !== false) {
-  throw new Test262Error("Expected desc.configurable to be false, actually " + desc.configurable);
-}
-if (desc.writable !== false) {
-  throw new Test262Error("Expected desc.writable to be false, actually " + desc.writable);
-}
-
-verifyEqualTo(obj, "foo", 10);
-
-verifyNotWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-2.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-2.js
index af0797a00d..c59e8e068a 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-2.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-2.js
@@ -31,17 +31,18 @@ Object.defineProperty(obj, "foo", {
 
 Object.freeze(obj);
 
-assert(obj.hasOwnProperty("foo"));
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  configurable: false,
+});
 
 assert.sameValue(obj.foo, 10);
 
 obj.foo = 12;
 assert(set_funcCalled);
 
-verifyEnumerable(obj, "foo");
-
-var desc = Object.getOwnPropertyDescriptor(obj, "foo");
-assert.sameValue(desc.configurable, false);
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-3.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-3.js
index 24be086754..9ac2917a53 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-3.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-3.js
@@ -37,7 +37,10 @@ Object.defineProperty(obj, "foo2", {
 
 Object.freeze(obj);
 
-verifyNotConfigurable(obj, "foo2");
+verifyProperty(obj, "foo2", {
+  configurable: false,
+});
+
 verifyEqualTo(obj, "foo2", 10);
 
 obj.foo2 = 12;
@@ -45,26 +48,21 @@ if (!resultSetFun) {
   throw new Test262Error('Expected obj["foo2"] set() to be called, but was not.');
 }
 
-if (!isEnumerable(obj, "foo2")) {
-  throw new Test262Error('Expected obj["foo2"] to be enumerable.');
-}
-
-var desc1 = Object.getOwnPropertyDescriptor(obj, "foo1");
-if (desc1.configurable || desc1.writable) {
-  throw new Test262Error('Expected obj["foo1"] to be non-writable, non-configurable; actually ' + JSON.stringify(desc1));
-}
+verifyProperty(obj, "foo2", {
+  enumerable: true,
+  configurable: false,
+});
 
 var desc2 = Object.getOwnPropertyDescriptor(obj, "foo2");
-if (desc2.configurable || desc2.writable) {
+if (desc2.writable) {
   throw new Test262Error('Expected obj["foo2"] to be non-writable, non-configurable; actually ' + JSON.stringify(desc2));
 }
 
-verifyEqualTo(obj, "foo1", 10);
-
-verifyNotWritable(obj, "foo1");
-
-verifyEnumerable(obj, "foo1");
-
-verifyNotConfigurable(obj, "foo1");
+verifyProperty(obj, "foo1", {
+  value: 10,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-4.js b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-4.js
index 49390cbf84..f211cbeb73 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-4.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/15.2.3.9-2-c-4.js
@@ -38,31 +38,30 @@ Object.freeze(obj);
 
 verifyEqualTo(obj, "foo2", 10);
 
-verifyNotConfigurable(obj, "foo2");
+verifyProperty(obj, "foo2", {
+  configurable: false,
+});
 
 obj.foo2 = 12;
 if (!resultSetFun) {
   throw new Test262Error('Expected obj["foo2"] set() to be called, but was not.');
 }
 
-verifyEnumerable(obj, "foo2");
-
-var desc1 = Object.getOwnPropertyDescriptor(obj, "foo1");
-if (desc1.configurable || desc1.writable) {
-  throw new Test262Error('Expected obj["foo1"] to be non-writable, non-configurable; actually ' + JSON.stringify(desc1));
-}
+verifyProperty(obj, "foo2", {
+  enumerable: true,
+  configurable: false,
+});
 
 var desc2 = Object.getOwnPropertyDescriptor(obj, "foo2");
-if (desc2.configurable || desc2.writable) {
+if (desc2.writable) {
   throw new Test262Error('Expected obj["foo2"] to be non-writable, non-configurable; actually ' + JSON.stringify(desc2));
 }
 
-verifyEqualTo(obj, "foo1", 10);
-
-verifyNotWritable(obj, "foo1");
-
-verifyEnumerable(obj, "foo1");
-
-verifyNotConfigurable(obj, "foo1");
+verifyProperty(obj, "foo1", {
+  value: 10,
+  writable: false,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/name.js b/js/src/tests/test262/built-ins/Object/freeze/name.js
index 1881d15751..c9f8c5115b 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/name.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.freeze.name, "freeze");
-
-verifyNotEnumerable(Object.freeze, "name");
-verifyNotWritable(Object.freeze, "name");
-verifyConfigurable(Object.freeze, "name");
+verifyProperty(Object.freeze, "name", {
+  value: "freeze",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/freeze/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/freeze/not-a-constructor.js
index 6d928f4f11..d4f1eadcfb 100644
--- a/js/src/tests/test262/built-ins/Object/freeze/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/freeze/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.freeze), false, 'isConstructor(Object.free
 
 assert.throws(TypeError, () => {
   new Object.freeze({});
-}, '`new Object.freeze({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/fromEntries/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/fromEntries/not-a-constructor.js
index d63a99663e..7c83209db1 100644
--- a/js/src/tests/test262/built-ins/Object/fromEntries/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/fromEntries/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.fromEntries), false, 'isConstructor(Object
 
 assert.throws(TypeError, () => {
   new Object.fromEntries([]);
-}, '`new Object.fromEntries([])` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptor/name.js b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptor/name.js
index 8752810f81..377656f7dd 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptor/name.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptor/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.getOwnPropertyDescriptor.name, "getOwnPropertyDescriptor");
-
-verifyNotEnumerable(Object.getOwnPropertyDescriptor, "name");
-verifyNotWritable(Object.getOwnPropertyDescriptor, "name");
-verifyConfigurable(Object.getOwnPropertyDescriptor, "name");
+verifyProperty(Object.getOwnPropertyDescriptor, "name", {
+  value: "getOwnPropertyDescriptor",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptor/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptor/not-a-constructor.js
index af851726d6..e48a450826 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptor/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptor/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.getOwnPropertyDescriptor({}, '');
-}, '`new Object.getOwnPropertyDescriptor({}, \'\')` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-length.js b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-length.js
index 8c1746ba9c..223cd5b1b4 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-length.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-length.js
@@ -8,10 +8,11 @@ author: Jordan Harband
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.getOwnPropertyDescriptors.length, 1, 'Expected Object.getOwnPropertyDescriptors.length to be 1');
-
-verifyNotEnumerable(Object.getOwnPropertyDescriptors, 'length');
-verifyNotWritable(Object.getOwnPropertyDescriptors, 'length');
-verifyConfigurable(Object.getOwnPropertyDescriptors, 'length');
+verifyProperty(Object.getOwnPropertyDescriptors, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-name.js b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-name.js
index 7037128d72..a718eb883c 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-name.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-name.js
@@ -8,14 +8,11 @@ author: Jordan Harband
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Object.getOwnPropertyDescriptors.name,
-  'getOwnPropertyDescriptors',
-  'Expected Object.getOwnPropertyDescriptors.name to be "getOwnPropertyDescriptors"'
-);
-
-verifyNotEnumerable(Object.getOwnPropertyDescriptors, 'name');
-verifyNotWritable(Object.getOwnPropertyDescriptors, 'name');
-verifyConfigurable(Object.getOwnPropertyDescriptors, 'name');
+verifyProperty(Object.getOwnPropertyDescriptors, "name", {
+  value: "getOwnPropertyDescriptors",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-property-descriptor.js b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-property-descriptor.js
index 2182f1234b..1d305b6d83 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-property-descriptor.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/function-property-descriptor.js
@@ -8,8 +8,10 @@ author: Jordan Harband
 includes: [propertyHelper.js]
 ---*/
 
-verifyNotEnumerable(Object, 'getOwnPropertyDescriptors');
-verifyWritable(Object, 'getOwnPropertyDescriptors');
-verifyConfigurable(Object, 'getOwnPropertyDescriptors');
+verifyProperty(Object, "getOwnPropertyDescriptors", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/not-a-constructor.js
index 3d03780e66..1ee9f034de 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertyDescriptors/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.getOwnPropertyDescriptors({});
-}, '`new Object.getOwnPropertyDescriptors({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertyNames/name.js b/js/src/tests/test262/built-ins/Object/getOwnPropertyNames/name.js
index 9ed3603700..1952cd6272 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertyNames/name.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertyNames/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.getOwnPropertyNames.name, "getOwnPropertyNames");
-
-verifyNotEnumerable(Object.getOwnPropertyNames, "name");
-verifyNotWritable(Object.getOwnPropertyNames, "name");
-verifyConfigurable(Object.getOwnPropertyNames, "name");
+verifyProperty(Object.getOwnPropertyNames, "name", {
+  value: "getOwnPropertyNames",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertyNames/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/getOwnPropertyNames/not-a-constructor.js
index 70a205d5a4..7a7cc7ffb3 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertyNames/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertyNames/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.getOwnPropertyNames({});
-}, '`new Object.getOwnPropertyNames({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/length.js b/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/length.js
index 6807e1d8dc..feb50325ca 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/length.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.getOwnPropertySymbols.length, 1);
-
-verifyNotEnumerable(Object.getOwnPropertySymbols, "length");
-verifyNotWritable(Object.getOwnPropertySymbols, "length");
-verifyConfigurable(Object.getOwnPropertySymbols, "length");
+verifyProperty(Object.getOwnPropertySymbols, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/name.js b/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/name.js
index 0199dbba7d..811508fbe5 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/name.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.getOwnPropertySymbols.name, "getOwnPropertySymbols");
-
-verifyNotEnumerable(Object.getOwnPropertySymbols, "name");
-verifyNotWritable(Object.getOwnPropertySymbols, "name");
-verifyConfigurable(Object.getOwnPropertySymbols, "name");
+verifyProperty(Object.getOwnPropertySymbols, "name", {
+  value: "getOwnPropertySymbols",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/not-a-constructor.js
index c9a4d86680..1c9a660888 100644
--- a/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/getOwnPropertySymbols/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.getOwnPropertySymbols({});
-}, '`new Object.getOwnPropertySymbols({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getPrototypeOf/name.js b/js/src/tests/test262/built-ins/Object/getPrototypeOf/name.js
index ad6ed3dfd7..5760387715 100644
--- a/js/src/tests/test262/built-ins/Object/getPrototypeOf/name.js
+++ b/js/src/tests/test262/built-ins/Object/getPrototypeOf/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.getPrototypeOf.name, "getPrototypeOf");
-
-verifyNotEnumerable(Object.getPrototypeOf, "name");
-verifyNotWritable(Object.getPrototypeOf, "name");
-verifyConfigurable(Object.getPrototypeOf, "name");
+verifyProperty(Object.getPrototypeOf, "name", {
+  value: "getPrototypeOf",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/getPrototypeOf/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/getPrototypeOf/not-a-constructor.js
index a40dd4beca..9bf94e49a5 100644
--- a/js/src/tests/test262/built-ins/Object/getPrototypeOf/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/getPrototypeOf/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.getPrototypeOf({});
-}, '`new Object.getPrototypeOf({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/groupBy/string.js b/js/src/tests/test262/built-ins/Object/groupBy/string.js
new file mode 100644
index 0000000000..6e34359f6d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/groupBy/string.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2023 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-object.groupby
+description: Object.groupBy works for string items
+info: |
+  Object.groupBy ( items, callbackfn )
+  ...
+includes: [compareArray.js]
+features: [array-grouping]
+---*/
+
+const string = '🥰💩🙏😈';
+
+const obj = Object.groupBy(string, function (char) {
+  return char < '🙏' ? 'before' : 'after';
+});
+
+assert.compareArray(Object.keys(obj), ['after', 'before']);
+assert.compareArray(obj.before, ['💩', '😈']);
+assert.compareArray(obj.after, ['🥰', '🙏']);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/hasOwn/descriptor.js b/js/src/tests/test262/built-ins/Object/hasOwn/descriptor.js
index 105e9eaa10..88feeea09a 100644
--- a/js/src/tests/test262/built-ins/Object/hasOwn/descriptor.js
+++ b/js/src/tests/test262/built-ins/Object/hasOwn/descriptor.js
@@ -9,8 +9,10 @@ author: Jamie Kyle
 features: [Object.hasOwn]
 ---*/
 
-verifyWritable(Object, "hasOwn");
-verifyNotEnumerable(Object, "hasOwn");
-verifyConfigurable(Object, "hasOwn");
+verifyProperty(Object, "hasOwn", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/hasOwn/name.js b/js/src/tests/test262/built-ins/Object/hasOwn/name.js
index c8532bc559..c421cc6b2b 100644
--- a/js/src/tests/test262/built-ins/Object/hasOwn/name.js
+++ b/js/src/tests/test262/built-ins/Object/hasOwn/name.js
@@ -21,10 +21,11 @@ author: Jamie Kyle
 features: [Object.hasOwn]
 ---*/
 
-assert.sameValue(Object.hasOwn.name, "hasOwn");
-
-verifyNotEnumerable(Object.hasOwn, "name");
-verifyNotWritable(Object.hasOwn, "name");
-verifyConfigurable(Object.hasOwn, "name");
+verifyProperty(Object.hasOwn, "name", {
+  value: "hasOwn",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/hasOwn/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/hasOwn/not-a-constructor.js
index a3badb6c87..a5baf6b30d 100644
--- a/js/src/tests/test262/built-ins/Object/hasOwn/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/hasOwn/not-a-constructor.js
@@ -30,6 +30,6 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.hasOwn('');
-}, '`new Object.hasOwn(\'\')` throws TypeError');
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/is/length.js b/js/src/tests/test262/built-ins/Object/is/length.js
index 98483984b9..9218a31356 100644
--- a/js/src/tests/test262/built-ins/Object/is/length.js
+++ b/js/src/tests/test262/built-ins/Object/is/length.js
@@ -10,10 +10,11 @@ description: >
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.is.length, 2, "The value of `Object.is.length` is `2`");
-
-verifyNotEnumerable(Object.is, "length");
-verifyNotWritable(Object.is, "length");
-verifyConfigurable(Object.is, "length");
+verifyProperty(Object.is, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/is/name.js b/js/src/tests/test262/built-ins/Object/is/name.js
index f495ccbc12..d614d88d0a 100644
--- a/js/src/tests/test262/built-ins/Object/is/name.js
+++ b/js/src/tests/test262/built-ins/Object/is/name.js
@@ -10,10 +10,11 @@ description: >
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.is.name, 'is', "The value of `Object.is.name` is `'is'`");
-
-verifyNotEnumerable(Object.is, "name");
-verifyNotWritable(Object.is, "name");
-verifyConfigurable(Object.is, "name");
+verifyProperty(Object.is, "name", {
+  value: "is",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/is/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/is/not-a-constructor.js
index 96c90fcc5d..b56849e5f1 100644
--- a/js/src/tests/test262/built-ins/Object/is/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/is/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.is), false, 'isConstructor(Object.is) must
 
 assert.throws(TypeError, () => {
   new Object.is(0, 0);
-}, '`new Object.is(0, 0)` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/is/object-is.js b/js/src/tests/test262/built-ins/Object/is/object-is.js
index 22dcd083aa..0865fb21ad 100644
--- a/js/src/tests/test262/built-ins/Object/is/object-is.js
+++ b/js/src/tests/test262/built-ins/Object/is/object-is.js
@@ -10,12 +10,12 @@ description: >
 includes: [propertyHelper.js]
 ---*/
 
-
 assert.sameValue(typeof Object.is, "function");
-assert.sameValue(Object.is.name, "is");
 
-verifyWritable(Object, "is");
-verifyNotEnumerable(Object, "is");
-verifyConfigurable(Object, "is");
+verifyProperty(Object, "is", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/isExtensible/name.js b/js/src/tests/test262/built-ins/Object/isExtensible/name.js
index ae6a6e6549..eff74b07fa 100644
--- a/js/src/tests/test262/built-ins/Object/isExtensible/name.js
+++ b/js/src/tests/test262/built-ins/Object/isExtensible/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.isExtensible.name, "isExtensible");
-
-verifyNotEnumerable(Object.isExtensible, "name");
-verifyNotWritable(Object.isExtensible, "name");
-verifyConfigurable(Object.isExtensible, "name");
+verifyProperty(Object.isExtensible, "name", {
+  value: "isExtensible",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/isExtensible/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/isExtensible/not-a-constructor.js
index 56ab6d19e3..b314e5250c 100644
--- a/js/src/tests/test262/built-ins/Object/isExtensible/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/isExtensible/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.isExtensible), false, 'isConstructor(Objec
 
 assert.throws(TypeError, () => {
   new Object.isExtensible({});
-}, '`new Object.isExtensible({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/isFrozen/name.js b/js/src/tests/test262/built-ins/Object/isFrozen/name.js
index 4b83c75722..d769d8939d 100644
--- a/js/src/tests/test262/built-ins/Object/isFrozen/name.js
+++ b/js/src/tests/test262/built-ins/Object/isFrozen/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.isFrozen.name, "isFrozen");
-
-verifyNotEnumerable(Object.isFrozen, "name");
-verifyNotWritable(Object.isFrozen, "name");
-verifyConfigurable(Object.isFrozen, "name");
+verifyProperty(Object.isFrozen, "name", {
+  value: "isFrozen",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/isFrozen/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/isFrozen/not-a-constructor.js
index 5f8014985b..cc42d1d9e8 100644
--- a/js/src/tests/test262/built-ins/Object/isFrozen/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/isFrozen/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.isFrozen), false, 'isConstructor(Object.is
 
 assert.throws(TypeError, () => {
   new Object.isFrozen({});
-}, '`new Object.isFrozen({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/isSealed/name.js b/js/src/tests/test262/built-ins/Object/isSealed/name.js
index c11f5b4842..54620f96f1 100644
--- a/js/src/tests/test262/built-ins/Object/isSealed/name.js
+++ b/js/src/tests/test262/built-ins/Object/isSealed/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.isSealed.name, "isSealed");
-
-verifyNotEnumerable(Object.isSealed, "name");
-verifyNotWritable(Object.isSealed, "name");
-verifyConfigurable(Object.isSealed, "name");
+verifyProperty(Object.isSealed, "name", {
+  value: "isSealed",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/isSealed/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/isSealed/not-a-constructor.js
index a02bf5f415..ed39336fd1 100644
--- a/js/src/tests/test262/built-ins/Object/isSealed/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/isSealed/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.isSealed), false, 'isConstructor(Object.is
 
 assert.throws(TypeError, () => {
   new Object.isSealed({});
-}, '`new Object.isSealed({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/keys/name.js b/js/src/tests/test262/built-ins/Object/keys/name.js
index 4839cf4031..413d847fc8 100644
--- a/js/src/tests/test262/built-ins/Object/keys/name.js
+++ b/js/src/tests/test262/built-ins/Object/keys/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.keys.name, "keys");
-
-verifyNotEnumerable(Object.keys, "name");
-verifyNotWritable(Object.keys, "name");
-verifyConfigurable(Object.keys, "name");
+verifyProperty(Object.keys, "name", {
+  value: "keys",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/keys/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/keys/not-a-constructor.js
index dc5c3083f2..4dbfa236f6 100644
--- a/js/src/tests/test262/built-ins/Object/keys/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/keys/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.keys), false, 'isConstructor(Object.keys)
 
 assert.throws(TypeError, () => {
   new Object.keys({});
-}, '`new Object.keys({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/preventExtensions/name.js b/js/src/tests/test262/built-ins/Object/preventExtensions/name.js
index 09e9f7130d..b42ad2df39 100644
--- a/js/src/tests/test262/built-ins/Object/preventExtensions/name.js
+++ b/js/src/tests/test262/built-ins/Object/preventExtensions/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.preventExtensions.name, "preventExtensions");
-
-verifyNotEnumerable(Object.preventExtensions, "name");
-verifyNotWritable(Object.preventExtensions, "name");
-verifyConfigurable(Object.preventExtensions, "name");
+verifyProperty(Object.preventExtensions, "name", {
+  value: "preventExtensions",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/preventExtensions/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/preventExtensions/not-a-constructor.js
index dac8c6ee18..1b8b5fb864 100644
--- a/js/src/tests/test262/built-ins/Object/preventExtensions/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/preventExtensions/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.preventExtensions({});
-}, '`new Object.preventExtensions({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prop-desc.js b/js/src/tests/test262/built-ins/Object/prop-desc.js
index 64e7a8969a..512b652cbb 100644
--- a/js/src/tests/test262/built-ins/Object/prop-desc.js
+++ b/js/src/tests/test262/built-ins/Object/prop-desc.js
@@ -11,8 +11,10 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-verifyNotEnumerable(this, "Object");
-verifyWritable(this, "Object");
-verifyConfigurable(this, "Object");
+verifyProperty(this, "Object", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/hasOwnProperty/name.js b/js/src/tests/test262/built-ins/Object/prototype/hasOwnProperty/name.js
index ae01259e26..35d0280902 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/hasOwnProperty/name.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/hasOwnProperty/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.prototype.hasOwnProperty.name, "hasOwnProperty");
-
-verifyNotEnumerable(Object.prototype.hasOwnProperty, "name");
-verifyNotWritable(Object.prototype.hasOwnProperty, "name");
-verifyConfigurable(Object.prototype.hasOwnProperty, "name");
+verifyProperty(Object.prototype.hasOwnProperty, "name", {
+  value: "hasOwnProperty",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/hasOwnProperty/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/prototype/hasOwnProperty/not-a-constructor.js
index 07d38e779c..33f4aca473 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/hasOwnProperty/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/hasOwnProperty/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.prototype.hasOwnProperty('');
-}, '`new Object.prototype.hasOwnProperty(\'\')` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/isPrototypeOf/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/prototype/isPrototypeOf/not-a-constructor.js
index 9de714cba9..e8324db0be 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/isPrototypeOf/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/isPrototypeOf/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.prototype.isPrototypeOf({});
-}, '`new Object.prototype.isPrototypeOf({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/propertyIsEnumerable/name.js b/js/src/tests/test262/built-ins/Object/prototype/propertyIsEnumerable/name.js
index 9054d1f7a5..b6638e42e3 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/propertyIsEnumerable/name.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/propertyIsEnumerable/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.prototype.propertyIsEnumerable.name, "propertyIsEnumerable");
-
-verifyNotEnumerable(Object.prototype.propertyIsEnumerable, "name");
-verifyNotWritable(Object.prototype.propertyIsEnumerable, "name");
-verifyConfigurable(Object.prototype.propertyIsEnumerable, "name");
+verifyProperty(Object.prototype.propertyIsEnumerable, "name", {
+  value: "propertyIsEnumerable",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/propertyIsEnumerable/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/prototype/propertyIsEnumerable/not-a-constructor.js
index e8bdaf469e..71cb963283 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/propertyIsEnumerable/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/propertyIsEnumerable/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.prototype.propertyIsEnumerable('');
-}, '`new Object.prototype.propertyIsEnumerable(\'\')` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/toLocaleString/name.js b/js/src/tests/test262/built-ins/Object/prototype/toLocaleString/name.js
index 5f258165ba..835f5a488b 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/toLocaleString/name.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/toLocaleString/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.prototype.toLocaleString.name, "toLocaleString");
-
-verifyNotEnumerable(Object.prototype.toLocaleString, "name");
-verifyNotWritable(Object.prototype.toLocaleString, "name");
-verifyConfigurable(Object.prototype.toLocaleString, "name");
+verifyProperty(Object.prototype.toLocaleString, "name", {
+  value: "toLocaleString",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/toLocaleString/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/prototype/toLocaleString/not-a-constructor.js
index 49fc0525db..ed9b6d87dc 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/toLocaleString/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/toLocaleString/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.prototype.toLocaleString('');
-}, '`new Object.prototype.toLocaleString(\'\')` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/toString/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/prototype/toString/not-a-constructor.js
index 54f974d24f..ca2f1b3d64 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/toString/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/toString/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.prototype.toString();
-}, '`new Object.prototype.toString()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/toString/prop-desc.js b/js/src/tests/test262/built-ins/Object/prototype/toString/prop-desc.js
index 7d3ac0d66b..6ce7d132aa 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/toString/prop-desc.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/toString/prop-desc.js
@@ -16,8 +16,10 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-verifyWritable(Object.prototype, "toString");
-verifyNotEnumerable(Object.prototype, "toString");
-verifyConfigurable(Object.prototype, "toString");
+verifyProperty(Object.prototype, "toString", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/valueOf/name.js b/js/src/tests/test262/built-ins/Object/prototype/valueOf/name.js
index 7648b4002d..08140e27d9 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/valueOf/name.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/valueOf/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.prototype.valueOf.name, "valueOf");
-
-verifyNotEnumerable(Object.prototype.valueOf, "name");
-verifyNotWritable(Object.prototype.valueOf, "name");
-verifyConfigurable(Object.prototype.valueOf, "name");
+verifyProperty(Object.prototype.valueOf, "name", {
+  value: "valueOf",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/prototype/valueOf/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/prototype/valueOf/not-a-constructor.js
index 6db8b1c516..1aaca96dc8 100644
--- a/js/src/tests/test262/built-ins/Object/prototype/valueOf/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/prototype/valueOf/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.prototype.valueOf();
-}, '`new Object.prototype.valueOf()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/configurable-attribute-all-own-properties-set-from-true-to-false-property-are-unaltered.js b/js/src/tests/test262/built-ins/Object/seal/configurable-attribute-all-own-properties-set-from-true-to-false-property-are-unaltered.js
index 4b337ca128..2d8f782d8d 100644
--- a/js/src/tests/test262/built-ins/Object/seal/configurable-attribute-all-own-properties-set-from-true-to-false-property-are-unaltered.js
+++ b/js/src/tests/test262/built-ins/Object/seal/configurable-attribute-all-own-properties-set-from-true-to-false-property-are-unaltered.js
@@ -40,21 +40,20 @@ if (!preCheck) {
   throw new Test262Error('Expected preCheck to be true, actually ' + preCheck);
 }
 
-
-verifyEqualTo(obj, "foo1", 10);
-
-verifyWritable(obj, "foo1");
-
-verifyEnumerable(obj, "foo1");
-
-verifyNotConfigurable(obj, "foo1");
+verifyProperty(obj, "foo1", {
+  value: 10,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 verifyEqualTo(obj, "foo2", get_func());
 
 verifyWritable(obj, "foo2", "variableForHelpVerify");
 
-verifyEnumerable(obj, "foo2");
-
-verifyNotConfigurable(obj, "foo2");
+verifyProperty(obj, "foo2", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/configurable-attribute-own-accessor-property-set-from-true-to-false-property-are-unaltered.js b/js/src/tests/test262/built-ins/Object/seal/configurable-attribute-own-accessor-property-set-from-true-to-false-property-are-unaltered.js
index 5c28cf68a4..fa49cab540 100644
--- a/js/src/tests/test262/built-ins/Object/seal/configurable-attribute-own-accessor-property-set-from-true-to-false-property-are-unaltered.js
+++ b/js/src/tests/test262/built-ins/Object/seal/configurable-attribute-own-accessor-property-set-from-true-to-false-property-are-unaltered.js
@@ -37,8 +37,9 @@ verifyEqualTo(obj, "foo", getFunc());
 
 verifyWritable(obj, "foo", "variableForHelpVerify");
 
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/length.js b/js/src/tests/test262/built-ins/Object/seal/length.js
index 114de5fd88..515d284d28 100644
--- a/js/src/tests/test262/built-ins/Object/seal/length.js
+++ b/js/src/tests/test262/built-ins/Object/seal/length.js
@@ -14,10 +14,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.seal.length, 1);
-
-verifyNotEnumerable(Object.seal, "length");
-verifyNotWritable(Object.seal, "length");
-verifyConfigurable(Object.seal, "length");
+verifyProperty(Object.seal, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/name.js b/js/src/tests/test262/built-ins/Object/seal/name.js
index 3b7047d2c1..eb76408886 100644
--- a/js/src/tests/test262/built-ins/Object/seal/name.js
+++ b/js/src/tests/test262/built-ins/Object/seal/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.seal.name, "seal");
-
-verifyNotEnumerable(Object.seal, "name");
-verifyNotWritable(Object.seal, "name");
-verifyConfigurable(Object.seal, "name");
+verifyProperty(Object.seal, "name", {
+  value: "seal",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/seal/not-a-constructor.js
index 97ade868fe..8ea819dbd5 100644
--- a/js/src/tests/test262/built-ins/Object/seal/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/seal/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.seal), false, 'isConstructor(Object.seal)
 
 assert.throws(TypeError, () => {
   new Object.seal();
-}, '`new Object.seal()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-all-own-properties-of-o-are-already-non-configurable.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-all-own-properties-of-o-are-already-non-configurable.js
index 563b4d318e..65276afb2b 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-all-own-properties-of-o-are-already-non-configurable.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-all-own-properties-of-o-are-already-non-configurable.js
@@ -43,19 +43,20 @@ if (Object.isExtensible(obj)) {
   throw new Test262Error('Expected obj NOT to be extensible, actually ' + Object.isExtensible(obj));
 }
 
-verifyEqualTo(obj, "foo1", 10);
-
-verifyWritable(obj, "foo1");
-
-verifyEnumerable(obj, "foo1");
+verifyProperty(obj, "foo1", {
+  value: 10,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
-verifyNotConfigurable(obj, "foo1");
 verifyEqualTo(obj, "foo2", get_func());
 
 verifyWritable(obj, "foo2", "variableForHelpVerify");
 
-verifyEnumerable(obj, "foo2");
-
-verifyNotConfigurable(obj, "foo2");
+verifyProperty(obj, "foo2", {
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-configurable-attribute-of-own-data-property-of-o-is-set-from-true-to-false-and-other-attributes-of-the-property-are-unaltered.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-configurable-attribute-of-own-data-property-of-o-is-set-from-true-to-false-and-other-attributes-of-the-property-are-unaltered.js
index 0d59c51bca..3ab85abfc6 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-configurable-attribute-of-own-data-property-of-o-is-set-from-true-to-false-and-other-attributes-of-the-property-are-unaltered.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-configurable-attribute-of-own-data-property-of-o-is-set-from-true-to-false-and-other-attributes-of-the-property-are-unaltered.js
@@ -25,12 +25,11 @@ if (!preCheck) {
   throw new Test262Error('Expected preCheck to be true, actually ' + preCheck);
 }
 
-verifyEqualTo(obj, "foo", 10);
-
-verifyWritable(obj, "foo");
-
-verifyEnumerable(obj, "foo");
-
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  value: 10,
+  writable: true,
+  enumerable: true,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-non-enumerable-own-property-of-o-is-sealed.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-non-enumerable-own-property-of-o-is-sealed.js
index 02501ec379..ef2a857c7a 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-non-enumerable-own-property-of-o-is-sealed.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-non-enumerable-own-property-of-o-is-sealed.js
@@ -18,7 +18,8 @@ Object.defineProperty(obj, "foo", {
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-assert(obj.hasOwnProperty("foo"));
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property-that-overrides-an-inherited-accessor-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property-that-overrides-an-inherited-accessor-property.js
index 7f5c68979e..7aea052abe 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property-that-overrides-an-inherited-accessor-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property-that-overrides-an-inherited-accessor-property.js
@@ -33,7 +33,10 @@ Object.defineProperty(obj, "foo", {
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  configurable: false,
+});
+
 assert.sameValue(obj.foo, 10);
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property-that-overrides-an-inherited-data-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property-that-overrides-an-inherited-data-property.js
index e3a3707431..f155e7975f 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property-that-overrides-an-inherited-data-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property-that-overrides-an-inherited-data-property.js
@@ -31,7 +31,10 @@ Object.defineProperty(obj, "foo", {
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  configurable: false,
+});
+
 assert.sameValue(obj.foo, 10);
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property.js
index 3704d492ba..43b4e402d1 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-accessor-property.js
@@ -19,7 +19,10 @@ Object.defineProperty(obj, "foo", {
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
+verifyProperty(obj, "foo", {
+  configurable: false,
+});
+
 assert.sameValue(obj.foo, 10);
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property-that-overrides-an-inherited-accessor-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property-that-overrides-an-inherited-accessor-property.js
index e146af8558..32125f67c4 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property-that-overrides-an-inherited-accessor-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property-that-overrides-an-inherited-accessor-property.js
@@ -30,7 +30,9 @@ Object.defineProperty(obj, "foo", {
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property-that-overrides-an-inherited-data-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property-that-overrides-an-inherited-data-property.js
index e62e3fb902..10127134e7 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property-that-overrides-an-inherited-data-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property-that-overrides-an-inherited-data-property.js
@@ -25,7 +25,9 @@ Object.defineProperty(obj, "foo", {
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property.js
index d19e947979..953710ace7 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-data-property.js
@@ -14,7 +14,9 @@ obj.foo = 10; // default [[Configurable]] attribute value of foo: true
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-boolean-object-that-uses-object-s-get-own-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-boolean-object-that-uses-object-s-get-own-property.js
index 20d4898020..5a2c970b25 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-boolean-object-that-uses-object-s-get-own-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-boolean-object-that-uses-object-s-get-own-property.js
@@ -16,7 +16,9 @@ obj.foo = 10;
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-date-object-that-uses-object-s-get-own-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-date-object-that-uses-object-s-get-own-property.js
index 2517e70bc0..77a161b71e 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-date-object-that-uses-object-s-get-own-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-date-object-that-uses-object-s-get-own-property.js
@@ -16,7 +16,9 @@ obj.foo = 10;
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-function-object-that-uses-object-s-get-own-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-function-object-that-uses-object-s-get-own-property.js
index 18c786075d..db8ba4f6d3 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-function-object-that-uses-object-s-get-own-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-function-object-that-uses-object-s-get-own-property.js
@@ -16,7 +16,9 @@ obj.foo = 10;
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-number-object-that-uses-object-s-get-own-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-number-object-that-uses-object-s-get-own-property.js
index 9db2104ff6..d577097702 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-number-object-that-uses-object-s-get-own-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-number-object-that-uses-object-s-get-own-property.js
@@ -16,7 +16,9 @@ obj.foo = 10;
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-reg-exp-object-that-uses-object-s-get-own-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-reg-exp-object-that-uses-object-s-get-own-property.js
index 839ce7dd37..7fefac239a 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-reg-exp-object-that-uses-object-s-get-own-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-reg-exp-object-that-uses-object-s-get-own-property.js
@@ -16,7 +16,9 @@ obj.foo = 10;
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-string-object-which-implements-its-own-get-own-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-string-object-which-implements-its-own-get-own-property.js
index 7561754fd0..a3badbcd63 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-string-object-which-implements-its-own-get-own-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-a-string-object-which-implements-its-own-get-own-property.js
@@ -16,7 +16,9 @@ obj.foo = 10;
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-arguments-object-which-implements-its-own-get-own-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-arguments-object-which-implements-its-own-get-own-property.js
index 39853c155f..0b9a0ddc9c 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-arguments-object-which-implements-its-own-get-own-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-arguments-object-which-implements-its-own-get-own-property.js
@@ -18,7 +18,9 @@ obj.foo = 10;
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-array-object-that-uses-object-s-get-own-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-array-object-that-uses-object-s-get-own-property.js
index 26e19643df..8c7c2fd0fb 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-array-object-that-uses-object-s-get-own-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-array-object-that-uses-object-s-get-own-property.js
@@ -16,7 +16,9 @@ obj.foo = 10;
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-error-object-that-uses-object-s-get-own-property.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-error-object-that-uses-object-s-get-own-property.js
index 045b2c0248..7989899aa8 100644
--- a/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-error-object-that-uses-object-s-get-own-property.js
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-p-is-own-property-of-an-error-object-that-uses-object-s-get-own-property.js
@@ -16,7 +16,9 @@ obj.foo = 10;
 assert(Object.isExtensible(obj));
 Object.seal(obj);
 
-verifyNotConfigurable(obj, "foo");
-assert.sameValue(obj.foo, 10);
+verifyProperty(obj, "foo", {
+  value: 10,
+  configurable: false,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/setPrototypeOf/length.js b/js/src/tests/test262/built-ins/Object/setPrototypeOf/length.js
index f2f8d611b9..7640d3f587 100644
--- a/js/src/tests/test262/built-ins/Object/setPrototypeOf/length.js
+++ b/js/src/tests/test262/built-ins/Object/setPrototypeOf/length.js
@@ -18,14 +18,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Object.setPrototypeOf.length,
-  2,
-  'The value of `Object.setPrototypeOf.length` is `2`'
-);
-
-verifyNotEnumerable(Object.setPrototypeOf, 'length');
-verifyNotWritable(Object.setPrototypeOf, 'length');
-verifyConfigurable(Object.setPrototypeOf, 'length');
+verifyProperty(Object.setPrototypeOf, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/setPrototypeOf/name.js b/js/src/tests/test262/built-ins/Object/setPrototypeOf/name.js
index 1c9ab55a58..e5a46daee0 100644
--- a/js/src/tests/test262/built-ins/Object/setPrototypeOf/name.js
+++ b/js/src/tests/test262/built-ins/Object/setPrototypeOf/name.js
@@ -19,14 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Object.setPrototypeOf.name,
-  'setPrototypeOf',
-  'The value of `Object.setPrototypeOf.name` is `"setPrototypeOf"`'
-);
-
-verifyNotEnumerable(Object.setPrototypeOf, 'name');
-verifyNotWritable(Object.setPrototypeOf, 'name');
-verifyConfigurable(Object.setPrototypeOf, 'name');
+verifyProperty(Object.setPrototypeOf, "name", {
+  value: "setPrototypeOf",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/setPrototypeOf/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/setPrototypeOf/not-a-constructor.js
index 625f438f4a..da7d13cba6 100644
--- a/js/src/tests/test262/built-ins/Object/setPrototypeOf/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/setPrototypeOf/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Object.setPrototypeOf({}, {});
-}, '`new Object.setPrototypeOf({}, {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/setPrototypeOf/property-descriptor.js b/js/src/tests/test262/built-ins/Object/setPrototypeOf/property-descriptor.js
index 946db0ad9c..9c04d4c683 100644
--- a/js/src/tests/test262/built-ins/Object/setPrototypeOf/property-descriptor.js
+++ b/js/src/tests/test262/built-ins/Object/setPrototypeOf/property-descriptor.js
@@ -12,8 +12,10 @@ includes: [propertyHelper.js]
 
 assert.sameValue(typeof Object.setPrototypeOf, 'function');
 
-verifyNotEnumerable(Object, 'setPrototypeOf');
-verifyWritable(Object, 'setPrototypeOf');
-verifyConfigurable(Object, 'setPrototypeOf');
+verifyProperty(Object, "setPrototypeOf", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/values/function-length.js b/js/src/tests/test262/built-ins/Object/values/function-length.js
index bb3ede0e3c..93d6a66639 100644
--- a/js/src/tests/test262/built-ins/Object/values/function-length.js
+++ b/js/src/tests/test262/built-ins/Object/values/function-length.js
@@ -8,10 +8,11 @@ author: Jordan Harband
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Object.values.length, 1, 'Expected Object.values.length to be 1');
-
-verifyNotEnumerable(Object.values, 'length');
-verifyNotWritable(Object.values, 'length');
-verifyConfigurable(Object.values, 'length');
+verifyProperty(Object.values, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/values/function-name.js b/js/src/tests/test262/built-ins/Object/values/function-name.js
index 6535fd2db4..a008546f02 100644
--- a/js/src/tests/test262/built-ins/Object/values/function-name.js
+++ b/js/src/tests/test262/built-ins/Object/values/function-name.js
@@ -8,14 +8,11 @@ author: Jordan Harband
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Object.values.name,
-  'values',
-  'Expected Object.values.name to be "values"'
-);
-
-verifyNotEnumerable(Object.values, 'name');
-verifyNotWritable(Object.values, 'name');
-verifyConfigurable(Object.values, 'name');
+verifyProperty(Object.values, "name", {
+  value: "values",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/values/function-property-descriptor.js b/js/src/tests/test262/built-ins/Object/values/function-property-descriptor.js
index ebd062c347..fb6a12c5b9 100644
--- a/js/src/tests/test262/built-ins/Object/values/function-property-descriptor.js
+++ b/js/src/tests/test262/built-ins/Object/values/function-property-descriptor.js
@@ -8,8 +8,10 @@ author: Jordan Harband
 includes: [propertyHelper.js]
 ---*/
 
-verifyNotEnumerable(Object, 'values');
-verifyWritable(Object, 'values');
-verifyConfigurable(Object, 'values');
+verifyProperty(Object, "values", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/values/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/values/not-a-constructor.js
index 632d285a49..5c647f604f 100644
--- a/js/src/tests/test262/built-ins/Object/values/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Object/values/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Object.values), false, 'isConstructor(Object.valu
 
 assert.throws(TypeError, () => {
   new Object.values({});
-}, '`new Object.values({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);