3 files changed, 13 insertions, 17 deletions
diff --git a/js/src/tests/test262/built-ins/WeakMap/prototype/delete/length.js b/js/src/tests/test262/built-ins/WeakMap/prototype/delete/length.js
index bfdcaff706..768a17db21 100644
--- a/js/src/tests/test262/built-ins/WeakMap/prototype/delete/length.js
+++ b/js/src/tests/test262/built-ins/WeakMap/prototype/delete/length.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  WeakMap.prototype.delete.length, 1,
-  'The value of WeakMap.prototype.delete.length is 1'
-);
-
-verifyNotEnumerable(WeakMap.prototype.delete, 'length');
-verifyNotWritable(WeakMap.prototype.delete, 'length');
-verifyConfigurable(WeakMap.prototype.delete, 'length');
+verifyProperty(WeakMap.prototype.delete, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/WeakMap/prototype/delete/name.js b/js/src/tests/test262/built-ins/WeakMap/prototype/delete/name.js
index 67bc4d2ee4..129943adcf 100644
--- a/js/src/tests/test262/built-ins/WeakMap/prototype/delete/name.js
+++ b/js/src/tests/test262/built-ins/WeakMap/prototype/delete/name.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  WeakMap.prototype.delete.name, 'delete',
-  'The value of WeakMap.prototype.delete.name is "delete"'
-);
-
-verifyNotEnumerable(WeakMap.prototype.delete, 'name');
-verifyNotWritable(WeakMap.prototype.delete, 'name');
-verifyConfigurable(WeakMap.prototype.delete, 'name');
+verifyProperty(WeakMap.prototype.delete, "name", {
+  value: "delete",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/WeakMap/prototype/delete/not-a-constructor.js b/js/src/tests/test262/built-ins/WeakMap/prototype/delete/not-a-constructor.js
index 59136bd1ef..eb219ebd2f 100644
--- a/js/src/tests/test262/built-ins/WeakMap/prototype/delete/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/WeakMap/prototype/delete/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   let wm = new WeakMap(); new wm.delete();
-}, '`let wm = new WeakMap(); new wm.delete()` throws TypeError');
+});
 
 
 reportCompare(0, 0);