Merging upstream version 127.0.

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

32 files changed, 132 insertions, 112 deletions

diff --git a/js/src/tests/test262/built-ins/Number/isFinite/length.js b/js/src/tests/test262/built-ins/Number/isFinite/length.js
index 474fcb877f..f2130d61f8 100644
--- a/js/src/tests/test262/built-ins/Number/isFinite/length.js
+++ b/js/src/tests/test262/built-ins/Number/isFinite/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.isFinite.length, 1);
-
-verifyNotEnumerable(Number.isFinite, "length");
-verifyNotWritable(Number.isFinite, "length");
-verifyConfigurable(Number.isFinite, "length");
+verifyProperty(Number.isFinite, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isFinite/name.js b/js/src/tests/test262/built-ins/Number/isFinite/name.js
index 61abe6571a..ce0c2b2e11 100644
--- a/js/src/tests/test262/built-ins/Number/isFinite/name.js
+++ b/js/src/tests/test262/built-ins/Number/isFinite/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.isFinite.name, "isFinite");
-
-verifyNotEnumerable(Number.isFinite, "name");
-verifyNotWritable(Number.isFinite, "name");
-verifyConfigurable(Number.isFinite, "name");
+verifyProperty(Number.isFinite, "name", {
+  value: "isFinite",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isFinite/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/isFinite/not-a-constructor.js
index 4e42a62e9b..6a97ffb93d 100644
--- a/js/src/tests/test262/built-ins/Number/isFinite/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/isFinite/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Number.isFinite), false, 'isConstructor(Number.is
 
 assert.throws(TypeError, () => {
   new Number.isFinite();
-}, '`new Number.isFinite()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isInteger/length.js b/js/src/tests/test262/built-ins/Number/isInteger/length.js
index 99bd2d168f..216ee2960a 100644
--- a/js/src/tests/test262/built-ins/Number/isInteger/length.js
+++ b/js/src/tests/test262/built-ins/Number/isInteger/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.isInteger.length, 1);
-
-verifyNotEnumerable(Number.isInteger, "length");
-verifyNotWritable(Number.isInteger, "length");
-verifyConfigurable(Number.isInteger, "length");
+verifyProperty(Number.isInteger, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isInteger/name.js b/js/src/tests/test262/built-ins/Number/isInteger/name.js
index 224c94dba9..755e55d2eb 100644
--- a/js/src/tests/test262/built-ins/Number/isInteger/name.js
+++ b/js/src/tests/test262/built-ins/Number/isInteger/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.isInteger.name, "isInteger");
-
-verifyNotEnumerable(Number.isInteger, "name");
-verifyNotWritable(Number.isInteger, "name");
-verifyConfigurable(Number.isInteger, "name");
+verifyProperty(Number.isInteger, "name", {
+  value: "isInteger",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isInteger/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/isInteger/not-a-constructor.js
index 2dad2e9df7..9c06c58ad3 100644
--- a/js/src/tests/test262/built-ins/Number/isInteger/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/isInteger/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Number.isInteger), false, 'isConstructor(Number.i
 
 assert.throws(TypeError, () => {
   new Number.isInteger();
-}, '`new Number.isInteger()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isNaN/length.js b/js/src/tests/test262/built-ins/Number/isNaN/length.js
index 302e20edf9..b196887226 100644
--- a/js/src/tests/test262/built-ins/Number/isNaN/length.js
+++ b/js/src/tests/test262/built-ins/Number/isNaN/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.isNaN.length, 1);
-
-verifyNotEnumerable(Number.isNaN, "length");
-verifyNotWritable(Number.isNaN, "length");
-verifyConfigurable(Number.isNaN, "length");
+verifyProperty(Number.isNaN, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isNaN/name.js b/js/src/tests/test262/built-ins/Number/isNaN/name.js
index 4d97acdf97..caeb19ed3c 100644
--- a/js/src/tests/test262/built-ins/Number/isNaN/name.js
+++ b/js/src/tests/test262/built-ins/Number/isNaN/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.isNaN.name, "isNaN");
-
-verifyNotEnumerable(Number.isNaN, "name");
-verifyNotWritable(Number.isNaN, "name");
-verifyConfigurable(Number.isNaN, "name");
+verifyProperty(Number.isNaN, "name", {
+  value: "isNaN",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isNaN/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/isNaN/not-a-constructor.js
index 482812547c..abca3f5a2e 100644
--- a/js/src/tests/test262/built-ins/Number/isNaN/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/isNaN/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Number.isNaN), false, 'isConstructor(Number.isNaN
 
 assert.throws(TypeError, () => {
   new Number.isNaN();
-}, '`new Number.isNaN()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isSafeInteger/length.js b/js/src/tests/test262/built-ins/Number/isSafeInteger/length.js
index bcc7e6a770..10c28bd884 100644
--- a/js/src/tests/test262/built-ins/Number/isSafeInteger/length.js
+++ b/js/src/tests/test262/built-ins/Number/isSafeInteger/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.isSafeInteger.length, 1);
-
-verifyNotEnumerable(Number.isSafeInteger, "length");
-verifyNotWritable(Number.isSafeInteger, "length");
-verifyConfigurable(Number.isSafeInteger, "length");
+verifyProperty(Number.isSafeInteger, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isSafeInteger/name.js b/js/src/tests/test262/built-ins/Number/isSafeInteger/name.js
index 3844d43e13..0e892691df 100644
--- a/js/src/tests/test262/built-ins/Number/isSafeInteger/name.js
+++ b/js/src/tests/test262/built-ins/Number/isSafeInteger/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.isSafeInteger.name, "isSafeInteger");
-
-verifyNotEnumerable(Number.isSafeInteger, "name");
-verifyNotWritable(Number.isSafeInteger, "name");
-verifyConfigurable(Number.isSafeInteger, "name");
+verifyProperty(Number.isSafeInteger, "name", {
+  value: "isSafeInteger",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/isSafeInteger/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/isSafeInteger/not-a-constructor.js
index dca11c9cd3..d1d73d7d26 100644
--- a/js/src/tests/test262/built-ins/Number/isSafeInteger/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/isSafeInteger/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Number.isSafeInteger), false, 'isConstructor(Numb
 
 assert.throws(TypeError, () => {
   new Number.isSafeInteger();
-}, '`new Number.isSafeInteger()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/parseFloat/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/parseFloat/not-a-constructor.js
index b660870fa8..e35b21f6f0 100644
--- a/js/src/tests/test262/built-ins/Number/parseFloat/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/parseFloat/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Number.parseFloat), false, 'isConstructor(Number.
 
 assert.throws(TypeError, () => {
   new Number.parseFloat();
-}, '`new Number.parseFloat()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/parseInt/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/parseInt/not-a-constructor.js
index 871e87adea..105aff520d 100644
--- a/js/src/tests/test262/built-ins/Number/parseInt/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/parseInt/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Number.parseInt), false, 'isConstructor(Number.pa
 
 assert.throws(TypeError, () => {
   new Number.parseInt();
-}, '`new Number.parseInt()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toExponential/length.js b/js/src/tests/test262/built-ins/Number/prototype/toExponential/length.js
index 0c146d1500..2215b836a2 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toExponential/length.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toExponential/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.toExponential.length, 1);
-
-verifyNotEnumerable(Number.prototype.toExponential, "length");
-verifyNotWritable(Number.prototype.toExponential, "length");
-verifyConfigurable(Number.prototype.toExponential, "length");
+verifyProperty(Number.prototype.toExponential, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toExponential/name.js b/js/src/tests/test262/built-ins/Number/prototype/toExponential/name.js
index a92b59ba75..b7ab8380c0 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toExponential/name.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toExponential/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.toExponential.name, "toExponential");
-
-verifyNotEnumerable(Number.prototype.toExponential, "name");
-verifyNotWritable(Number.prototype.toExponential, "name");
-verifyConfigurable(Number.prototype.toExponential, "name");
+verifyProperty(Number.prototype.toExponential, "name", {
+  value: "toExponential",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toExponential/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/prototype/toExponential/not-a-constructor.js
index bbf60fe972..6df8f0e848 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toExponential/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toExponential/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Number.prototype.toExponential();
-}, '`new Number.prototype.toExponential()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toFixed/length.js b/js/src/tests/test262/built-ins/Number/prototype/toFixed/length.js
index 241a60ad57..4451f57b62 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toFixed/length.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toFixed/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.toFixed.length, 1);
-
-verifyNotEnumerable(Number.prototype.toFixed, "length");
-verifyNotWritable(Number.prototype.toFixed, "length");
-verifyConfigurable(Number.prototype.toFixed, "length");
+verifyProperty(Number.prototype.toFixed, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toFixed/name.js b/js/src/tests/test262/built-ins/Number/prototype/toFixed/name.js
index 49a7dbd1a5..3037d36cdb 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toFixed/name.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toFixed/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.toFixed.name, "toFixed");
-
-verifyNotEnumerable(Number.prototype.toFixed, "name");
-verifyNotWritable(Number.prototype.toFixed, "name");
-verifyConfigurable(Number.prototype.toFixed, "name");
+verifyProperty(Number.prototype.toFixed, "name", {
+  value: "toFixed",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toFixed/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/prototype/toFixed/not-a-constructor.js
index 639cedbd85..bf196b8639 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toFixed/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toFixed/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Number.prototype.toFixed();
-}, '`new Number.prototype.toFixed()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/length.js b/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/length.js
index 0692c33edd..b2cefae1af 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/length.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.toLocaleString.length, 0);
-
-verifyNotEnumerable(Number.prototype.toLocaleString, "length");
-verifyNotWritable(Number.prototype.toLocaleString, "length");
-verifyConfigurable(Number.prototype.toLocaleString, "length");
+verifyProperty(Number.prototype.toLocaleString, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/name.js b/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/name.js
index 35f6b9a62b..9f6cfa7f26 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/name.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.toLocaleString.name, "toLocaleString");
-
-verifyNotEnumerable(Number.prototype.toLocaleString, "name");
-verifyNotWritable(Number.prototype.toLocaleString, "name");
-verifyConfigurable(Number.prototype.toLocaleString, "name");
+verifyProperty(Number.prototype.toLocaleString, "name", {
+  value: "toLocaleString",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/not-a-constructor.js
index d694532dcf..51ed09a33c 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toLocaleString/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Number.prototype.toLocaleString();
-}, '`new Number.prototype.toLocaleString()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toPrecision/length.js b/js/src/tests/test262/built-ins/Number/prototype/toPrecision/length.js
index a5cecd54d3..d0b018aedb 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toPrecision/length.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toPrecision/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.toPrecision.length, 1);
-
-verifyNotEnumerable(Number.prototype.toPrecision, "length");
-verifyNotWritable(Number.prototype.toPrecision, "length");
-verifyConfigurable(Number.prototype.toPrecision, "length");
+verifyProperty(Number.prototype.toPrecision, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toPrecision/name.js b/js/src/tests/test262/built-ins/Number/prototype/toPrecision/name.js
index 946c5ad308..61096abd77 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toPrecision/name.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toPrecision/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.toPrecision.name, "toPrecision");
-
-verifyNotEnumerable(Number.prototype.toPrecision, "name");
-verifyNotWritable(Number.prototype.toPrecision, "name");
-verifyConfigurable(Number.prototype.toPrecision, "name");
+verifyProperty(Number.prototype.toPrecision, "name", {
+  value: "toPrecision",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toPrecision/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/prototype/toPrecision/not-a-constructor.js
index 5424e12b7e..bcb3e378b7 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toPrecision/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toPrecision/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Number.prototype.toPrecision();
-}, '`new Number.prototype.toPrecision()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toString/length.js b/js/src/tests/test262/built-ins/Number/prototype/toString/length.js
index 0c57733f13..9d158f0677 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toString/length.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toString/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.toString.length, 1);
-
-verifyNotEnumerable(Number.prototype.toString, "length");
-verifyNotWritable(Number.prototype.toString, "length");
-verifyConfigurable(Number.prototype.toString, "length");
+verifyProperty(Number.prototype.toString, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toString/name.js b/js/src/tests/test262/built-ins/Number/prototype/toString/name.js
index 5072c7993b..2d6a750ca4 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toString/name.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toString/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.toString.name, "toString");
-
-verifyNotEnumerable(Number.prototype.toString, "name");
-verifyNotWritable(Number.prototype.toString, "name");
-verifyConfigurable(Number.prototype.toString, "name");
+verifyProperty(Number.prototype.toString, "name", {
+  value: "toString",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/toString/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/prototype/toString/not-a-constructor.js
index e7f1f2ae77..9e5d5bb81d 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/toString/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/toString/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Number.prototype.toString();
-}, '`new Number.prototype.toString()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/valueOf/length.js b/js/src/tests/test262/built-ins/Number/prototype/valueOf/length.js
index 65a31127ff..57f56a4d2e 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/valueOf/length.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/valueOf/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.valueOf.length, 0);
-
-verifyNotEnumerable(Number.prototype.valueOf, "length");
-verifyNotWritable(Number.prototype.valueOf, "length");
-verifyConfigurable(Number.prototype.valueOf, "length");
+verifyProperty(Number.prototype.valueOf, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/valueOf/name.js b/js/src/tests/test262/built-ins/Number/prototype/valueOf/name.js
index 8c1830f5fd..83e8a70334 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/valueOf/name.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/valueOf/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Number.prototype.valueOf.name, "valueOf");
-
-verifyNotEnumerable(Number.prototype.valueOf, "name");
-verifyNotWritable(Number.prototype.valueOf, "name");
-verifyConfigurable(Number.prototype.valueOf, "name");
+verifyProperty(Number.prototype.valueOf, "name", {
+  value: "valueOf",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Number/prototype/valueOf/not-a-constructor.js b/js/src/tests/test262/built-ins/Number/prototype/valueOf/not-a-constructor.js
index 5037924ce3..ff11f64c20 100644
--- a/js/src/tests/test262/built-ins/Number/prototype/valueOf/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Number/prototype/valueOf/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Number.prototype.valueOf();
-}, '`new Number.prototype.valueOf()` throws TypeError');
+});
 
 
 reportCompare(0, 0);