Merging upstream version 127.0.

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

120 files changed, 470 insertions, 453 deletions

diff --git a/js/src/tests/test262/built-ins/Array/Symbol.species/length.js b/js/src/tests/test262/built-ins/Array/Symbol.species/length.js
index a0744b86ae..fba06806a3 100644
--- a/js/src/tests/test262/built-ins/Array/Symbol.species/length.js
+++ b/js/src/tests/test262/built-ins/Array/Symbol.species/length.js
@@ -25,10 +25,11 @@ features: [Symbol.species]
 
 var desc = Object.getOwnPropertyDescriptor(Array, Symbol.species);
 
-assert.sameValue(desc.get.length, 0);
-
-verifyNotEnumerable(desc.get, "length");
-verifyNotWritable(desc.get, "length");
-verifyConfigurable(desc.get, "length");
+verifyProperty(desc.get, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/Symbol.species/symbol-species-name.js b/js/src/tests/test262/built-ins/Array/Symbol.species/symbol-species-name.js
index 8c943ef709..f74dac394e 100644
--- a/js/src/tests/test262/built-ins/Array/Symbol.species/symbol-species-name.js
+++ b/js/src/tests/test262/built-ins/Array/Symbol.species/symbol-species-name.js
@@ -15,13 +15,11 @@ includes: [propertyHelper.js]
 
 var descriptor = Object.getOwnPropertyDescriptor(Array, Symbol.species);
 
-assert.sameValue(
-  descriptor.get.name,
-  'get [Symbol.species]'
-);
-
-verifyNotEnumerable(descriptor.get, 'name');
-verifyNotWritable(descriptor.get, 'name');
-verifyConfigurable(descriptor.get, 'name');
+verifyProperty(descriptor.get, "name", {
+  value: "get [Symbol.species]",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/Array.from-name.js b/js/src/tests/test262/built-ins/Array/from/Array.from-name.js
index 267647c639..7aecd2cb32 100644
--- a/js/src/tests/test262/built-ins/Array/from/Array.from-name.js
+++ b/js/src/tests/test262/built-ins/Array/from/Array.from-name.js
@@ -19,14 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.from.name,
-  'from',
-  'The value of Array.from.name is expected to be "from"'
-);
-
-verifyNotEnumerable(Array.from, 'name');
-verifyNotWritable(Array.from, 'name');
-verifyConfigurable(Array.from, 'name');
+verifyProperty(Array.from, "name", {
+  value: "from",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/Array.from_arity.js b/js/src/tests/test262/built-ins/Array/from/Array.from_arity.js
index 68b3287765..9442265a5e 100644
--- a/js/src/tests/test262/built-ins/Array/from/Array.from_arity.js
+++ b/js/src/tests/test262/built-ins/Array/from/Array.from_arity.js
@@ -14,10 +14,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.from.length, 1, 'The value of Array.from.length is expected to be 1');
-
-verifyNotEnumerable(Array.from, 'length');
-verifyNotWritable(Array.from, 'length');
-verifyConfigurable(Array.from, 'length');
+verifyProperty(Array.from, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/shell.js b/js/src/tests/test262/built-ins/Array/fromAsync/shell.js
index 3489e7ef68..4daca91e51 100644
--- a/js/src/tests/test262/built-ins/Array/fromAsync/shell.js
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/shell.js
@@ -2135,6 +2135,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2222,6 +2225,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/built-ins/Array/isArray/name.js b/js/src/tests/test262/built-ins/Array/isArray/name.js
index 1b2ebb5e42..22f5c6a23e 100644
--- a/js/src/tests/test262/built-ins/Array/isArray/name.js
+++ b/js/src/tests/test262/built-ins/Array/isArray/name.js
@@ -20,10 +20,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.isArray.name, "isArray", 'The value of Array.isArray.name is expected to be "isArray"');
-
-verifyNotEnumerable(Array.isArray, "name");
-verifyNotWritable(Array.isArray, "name");
-verifyConfigurable(Array.isArray, "name");
+verifyProperty(Array.isArray, "name", {
+  value: "isArray",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length.js b/js/src/tests/test262/built-ins/Array/length.js
index 16e8c44ec3..f8070579f4 100644
--- a/js/src/tests/test262/built-ins/Array/length.js
+++ b/js/src/tests/test262/built-ins/Array/length.js
@@ -17,10 +17,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.length, 1, 'The value of Array.length is expected to be 1');
-
-verifyNotEnumerable(Array, 'length');
-verifyNotWritable(Array, 'length');
-verifyConfigurable(Array, 'length');
+verifyProperty(Array, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/name.js b/js/src/tests/test262/built-ins/Array/name.js
index 621154b510..89a9a6aa89 100644
--- a/js/src/tests/test262/built-ins/Array/name.js
+++ b/js/src/tests/test262/built-ins/Array/name.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.name, 'Array', 'The value of Array.name is expected to be "Array"');
-
-verifyNotEnumerable(Array, 'name');
-verifyNotWritable(Array, 'name');
-verifyConfigurable(Array, 'name');
+verifyProperty(Array, "name", {
+  value: "Array",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/length.js b/js/src/tests/test262/built-ins/Array/of/length.js
index f77c48b768..59de2ff7ef 100644
--- a/js/src/tests/test262/built-ins/Array/of/length.js
+++ b/js/src/tests/test262/built-ins/Array/of/length.js
@@ -11,13 +11,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.of.length, 0,
-  'The value of Array.of.length is expected to be 0'
-);
-
-verifyNotEnumerable(Array.of, 'length');
-verifyNotWritable(Array.of, 'length');
-verifyConfigurable(Array.of, 'length');
+verifyProperty(Array.of, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/name.js b/js/src/tests/test262/built-ins/Array/of/name.js
index 842dd1ad11..39ce92b8e7 100644
--- a/js/src/tests/test262/built-ins/Array/of/name.js
+++ b/js/src/tests/test262/built-ins/Array/of/name.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.of.name, 'of',
-  'The value of Array.of.name is expected to be "of"'
-);
-
-verifyNotEnumerable(Array.of, 'name');
-verifyNotWritable(Array.of, 'name');
-verifyConfigurable(Array.of, 'name');
+verifyProperty(Array.of, "name", {
+  value: "of",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/not-a-constructor.js
index 5d7c96289e..c04cb85e2e 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype[Symbol.iterator]();
-}, '`new Array.prototype[Symbol.iterator]()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/length.js b/js/src/tests/test262/built-ins/Array/prototype/at/length.js
index 219f329eb4..68fb344a6d 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/at/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/length.js
@@ -18,13 +18,11 @@ assert.sameValue(
   'The value of `typeof Array.prototype.at` is expected to be "function"'
 );
 
-assert.sameValue(
-  Array.prototype.at.length, 1,
-  'The value of Array.prototype.at.length is expected to be 1'
-);
-
-verifyNotEnumerable(Array.prototype.at, 'length');
-verifyNotWritable(Array.prototype.at, 'length');
-verifyConfigurable(Array.prototype.at, 'length');
+verifyProperty(Array.prototype.at, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/length.js b/js/src/tests/test262/built-ins/Array/prototype/concat/length.js
index 5bff590dfd..7955443cef 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/concat/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/length.js
@@ -25,10 +25,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.concat.length, 1, 'The value of Array.prototype.concat.length is expected to be 1');
-
-verifyNotEnumerable(Array.prototype.concat, 'length');
-verifyNotWritable(Array.prototype.concat, 'length');
-verifyConfigurable(Array.prototype.concat, 'length');
+verifyProperty(Array.prototype.concat, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/name.js b/js/src/tests/test262/built-ins/Array/prototype/concat/name.js
index f81660ad08..bdb54322a0 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/concat/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/name.js
@@ -19,14 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.concat.name,
-  "concat",
-  'The value of Array.prototype.concat.name is expected to be "concat"'
-);
-
-verifyNotEnumerable(Array.prototype.concat, "name");
-verifyNotWritable(Array.prototype.concat, "name");
-verifyConfigurable(Array.prototype.concat, "name");
+verifyProperty(Array.prototype.concat, "name", {
+  value: "concat",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/length.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/length.js
index e846f74754..606a392fd7 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/length.js
@@ -10,13 +10,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.copyWithin.length, 2,
-  'The value of `Array.prototype.copyWithin.length` is `2`'
-);
-
-verifyNotEnumerable(Array.prototype.copyWithin, 'length');
-verifyNotWritable(Array.prototype.copyWithin, 'length');
-verifyConfigurable(Array.prototype.copyWithin, 'length');
+verifyProperty(Array.prototype.copyWithin, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/name.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/name.js
index c8c6c0b5b9..75549164b3 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/name.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.copyWithin.name, 'copyWithin',
-  'The value of `Array.prototype.copyWithin.name` is `"copyWithin"`'
-);
-
-verifyNotEnumerable(Array.prototype.copyWithin, 'name');
-verifyNotWritable(Array.prototype.copyWithin, 'name');
-verifyConfigurable(Array.prototype.copyWithin, 'name');
+verifyProperty(Array.prototype.copyWithin, "name", {
+  value: "copyWithin",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/not-a-constructor.js
index f16770a6c5..6255574819 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.copyWithin();
-}, '`new Array.prototype.copyWithin()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/length.js b/js/src/tests/test262/built-ins/Array/prototype/entries/length.js
index 28f3093b6b..29b8faf091 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/entries/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/length.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.entries.length, 0,
-  'The value of `Array.prototype.entries.length` is `0`'
-);
-
-verifyNotEnumerable(Array.prototype.entries, 'length');
-verifyNotWritable(Array.prototype.entries, 'length');
-verifyConfigurable(Array.prototype.entries, 'length');
+verifyProperty(Array.prototype.entries, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/name.js b/js/src/tests/test262/built-ins/Array/prototype/entries/name.js
index db9cd7a5d2..7ab25d6a45 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/entries/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/name.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.entries.name, 'entries',
-  'The value of `Array.prototype.entries.name` is `"entries"`'
-);
-
-verifyNotEnumerable(Array.prototype.entries, 'name');
-verifyNotWritable(Array.prototype.entries, 'name');
-verifyConfigurable(Array.prototype.entries, 'name');
+verifyProperty(Array.prototype.entries, "name", {
+  value: "entries",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/entries/not-a-constructor.js
index 7629f5b507..9149fb8153 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/entries/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.entries();
-}, '`new Array.prototype.entries()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/every/callbackfn-resize-arraybuffer.js
index a1a4ee5456..7579225ba9 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/every/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/length.js b/js/src/tests/test262/built-ins/Array/prototype/every/length.js
index 65015d9799..cf67099506 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/every/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/length.js
@@ -11,13 +11,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.every.length, 1,
-  'The value of `Array.prototype.every.length` is `1`'
-);
-
-verifyNotEnumerable(Array.prototype.every, 'length');
-verifyNotWritable(Array.prototype.every, 'length');
-verifyConfigurable(Array.prototype.every, 'length');
+verifyProperty(Array.prototype.every, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/name.js b/js/src/tests/test262/built-ins/Array/prototype/every/name.js
index 5bb10976b6..de095e7480 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/every/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.every.name, "every");
-
-verifyNotEnumerable(Array.prototype.every, "name");
-verifyNotWritable(Array.prototype.every, "name");
-verifyConfigurable(Array.prototype.every, "name");
+verifyProperty(Array.prototype.every, "name", {
+  value: "every",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/every/not-a-constructor.js
index 54dee55e8b..b817fd312e 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/every/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.every(() => {});
-}, '`new Array.prototype.every(() => {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/length.js b/js/src/tests/test262/built-ins/Array/prototype/fill/length.js
index 1d12345bc0..5a5000c55a 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/fill/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/length.js
@@ -8,13 +8,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.fill.length, 1,
-  'The value of `Array.prototype.fill.length` is `1`'
-);
-
-verifyNotEnumerable(Array.prototype.fill, 'length');
-verifyNotWritable(Array.prototype.fill, 'length');
-verifyConfigurable(Array.prototype.fill, 'length');
+verifyProperty(Array.prototype.fill, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/name.js b/js/src/tests/test262/built-ins/Array/prototype/fill/name.js
index 35d210dec3..e2c7b83e01 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/fill/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/name.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.fill.name, 'fill',
-  'The value of `Array.prototype.fill.name` is `"fill"`'
-);
-
-verifyNotEnumerable(Array.prototype.fill, 'name');
-verifyNotWritable(Array.prototype.fill, 'name');
-verifyConfigurable(Array.prototype.fill, 'name');
+verifyProperty(Array.prototype.fill, "name", {
+  value: "fill",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/fill/not-a-constructor.js
index 77d1be633b..9adb186adb 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/fill/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.fill), false, 'isConstructor(Arra
 
 assert.throws(TypeError, () => {
   new Array.prototype.fill();
-}, '`new Array.prototype.fill()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/filter/callbackfn-resize-arraybuffer.js
index ef7612695d..3908cfc93f 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/filter/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/length.js b/js/src/tests/test262/built-ins/Array/prototype/filter/length.js
index 06c9cf9762..be88cede23 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/filter/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/length.js
@@ -23,10 +23,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.filter.length, 1);
-
-verifyNotEnumerable(Array.prototype.filter, 'length');
-verifyNotWritable(Array.prototype.filter, 'length');
-verifyConfigurable(Array.prototype.filter, 'length');
+verifyProperty(Array.prototype.filter, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/name.js b/js/src/tests/test262/built-ins/Array/prototype/filter/name.js
index 4fbfcefd92..5b4f9754bd 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/filter/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.filter.name, "filter");
-
-verifyNotEnumerable(Array.prototype.filter, "name");
-verifyNotWritable(Array.prototype.filter, "name");
-verifyConfigurable(Array.prototype.filter, "name");
+verifyProperty(Array.prototype.filter, "name", {
+  value: "filter",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/filter/not-a-constructor.js
index f9b011ced5..2853408ae6 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/filter/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.filter(() => {});
-}, '`new Array.prototype.filter(() => {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/find/callbackfn-resize-arraybuffer.js
index 31a7b55750..3bf3aa2f52 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/find/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/length.js b/js/src/tests/test262/built-ins/Array/prototype/find/length.js
index 2522319483..a9ca424385 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/find/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/length.js
@@ -8,13 +8,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.find.length, 1,
-  'The value of `Array.prototype.find.length` is `1`'
-);
-
-verifyNotEnumerable(Array.prototype.find, 'length');
-verifyNotWritable(Array.prototype.find, 'length');
-verifyConfigurable(Array.prototype.find, 'length');
+verifyProperty(Array.prototype.find, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/name.js b/js/src/tests/test262/built-ins/Array/prototype/find/name.js
index 8a4c21fe67..d9ae189ec5 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/find/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/name.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.find.name, 'find',
-  'The value of `Array.prototype.find.name` is `"find"`'
-);
-
-verifyNotEnumerable(Array.prototype.find, 'name');
-verifyNotWritable(Array.prototype.find, 'name');
-verifyConfigurable(Array.prototype.find, 'name');
+verifyProperty(Array.prototype.find, "name", {
+  value: "find",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/find/not-a-constructor.js
index 8e2d17caff..b8921dd067 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/find/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.find), false, 'isConstructor(Arra
 
 assert.throws(TypeError, () => {
   new Array.prototype.find(() => {});
-}, '`new Array.prototype.find(() => {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/callbackfn-resize-arraybuffer.js
index dbd5c88d63..d7ebd5958b 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/findIndex/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/length.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/length.js
index dafeb333b1..44f8e31895 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/findIndex/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/length.js
@@ -8,13 +8,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.findIndex.length, 1,
-  'The value of `Array.prototype.findIndex.length` is `1`'
-);
-
-verifyNotEnumerable(Array.prototype.findIndex, 'length');
-verifyNotWritable(Array.prototype.findIndex, 'length');
-verifyConfigurable(Array.prototype.findIndex, 'length');
+verifyProperty(Array.prototype.findIndex, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/name.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/name.js
index ad6b6d5a28..564448f064 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/findIndex/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/name.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.findIndex.name, 'findIndex',
-  'The value of `Array.prototype.findIndex.name` is `"findIndex"`'
-);
-
-verifyNotEnumerable(Array.prototype.findIndex, 'name');
-verifyNotWritable(Array.prototype.findIndex, 'name');
-verifyConfigurable(Array.prototype.findIndex, 'name');
+verifyProperty(Array.prototype.findIndex, "name", {
+  value: "findIndex",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/not-a-constructor.js
index ce4d52002d..b85edccbe6 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/findIndex/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.findIndex(() => {});
-}, '`new Array.prototype.findIndex(() => {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/callbackfn-resize-arraybuffer.js
index 1f029bde80..6761bd57cd 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/findLast/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/not-a-constructor.js
index 9b2316f054..7bb9592536 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/findLast/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.findLast), false, 'isConstructor(
 
 assert.throws(TypeError, () => {
   new Array.prototype.findLast(() => {});
-}, '`new Array.prototype.findLast(() => {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/callbackfn-resize-arraybuffer.js
index 3d90fa7f17..50f8c9cc33 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/not-a-constructor.js
index 8c6000eea2..9155f03cab 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.findLastIndex(() => {});
-}, '`new Array.prototype.findLastIndex(() => {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/flat/not-a-constructor.js
index 5f9c2c1401..e712f86ec9 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/flat/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.flat), false, 'isConstructor(Arra
 
 assert.throws(TypeError, () => {
   new Array.prototype.flat();
-}, '`new Array.prototype.flat()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/not-a-constructor.js
index 8facbadc1c..41480d610d 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/flatMap/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.flatMap(() => {});
-}, '`new Array.prototype.flatMap(() => {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/callbackfn-resize-arraybuffer.js
index 402b9a7007..829d744e4d 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/forEach/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/length.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/length.js
index 8ca4a6185e..d9b2541122 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/forEach/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/length.js
@@ -23,10 +23,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.forEach.length, 1);
-
-verifyNotEnumerable(Array.prototype.forEach, 'length');
-verifyNotWritable(Array.prototype.forEach, 'length');
-verifyConfigurable(Array.prototype.forEach, 'length');
+verifyProperty(Array.prototype.forEach, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/name.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/name.js
index 08beb915e8..8c70987d9f 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/forEach/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.forEach.name, "forEach");
-
-verifyNotEnumerable(Array.prototype.forEach, "name");
-verifyNotWritable(Array.prototype.forEach, "name");
-verifyConfigurable(Array.prototype.forEach, "name");
+verifyProperty(Array.prototype.forEach, "name", {
+  value: "forEach",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/not-a-constructor.js
index 9662abaf98..a69333b135 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/forEach/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.forEach(() => {});
-}, '`new Array.prototype.forEach(() => {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/length.js b/js/src/tests/test262/built-ins/Array/prototype/includes/length.js
index e437df4d3c..af15396fab 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/includes/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/length.js
@@ -23,10 +23,11 @@ includes: [propertyHelper.js]
 features: [Array.prototype.includes]
 ---*/
 
-assert.sameValue(Array.prototype.includes.length, 1);
-
-verifyNotEnumerable(Array.prototype.includes, "length");
-verifyNotWritable(Array.prototype.includes, "length");
-verifyConfigurable(Array.prototype.includes, "length");
+verifyProperty(Array.prototype.includes, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/name.js b/js/src/tests/test262/built-ins/Array/prototype/includes/name.js
index c97a1fed91..e594108e11 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/includes/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/name.js
@@ -20,10 +20,11 @@ includes: [propertyHelper.js]
 features: [Array.prototype.includes]
 ---*/
 
-assert.sameValue(Array.prototype.includes.name, "includes");
-
-verifyNotEnumerable(Array.prototype.includes, "name");
-verifyNotWritable(Array.prototype.includes, "name");
-verifyConfigurable(Array.prototype.includes, "name");
+verifyProperty(Array.prototype.includes, "name", {
+  value: "includes",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/includes/not-a-constructor.js
index 0d673a9c31..937168e3e7 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/includes/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.includes(1);
-}, '`new Array.prototype.includes(1)` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/length.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/length.js
index 36a44e19dc..b6d399a6be 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/indexOf/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.indexOf.length, 1);
-
-verifyNotEnumerable(Array.prototype.indexOf, 'length');
-verifyNotWritable(Array.prototype.indexOf, 'length');
-verifyConfigurable(Array.prototype.indexOf, 'length');
+verifyProperty(Array.prototype.indexOf, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/name.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/name.js
index 5017f4381c..9d748ece9c 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/indexOf/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.indexOf.name, "indexOf");
-
-verifyNotEnumerable(Array.prototype.indexOf, "name");
-verifyNotWritable(Array.prototype.indexOf, "name");
-verifyConfigurable(Array.prototype.indexOf, "name");
+verifyProperty(Array.prototype.indexOf, "name", {
+  value: "indexOf",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/not-a-constructor.js
index d297029668..f094f6b1c0 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/indexOf/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.indexOf();
-}, '`new Array.prototype.indexOf()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/length.js b/js/src/tests/test262/built-ins/Array/prototype/join/length.js
index bdef13a59f..f5c31044d1 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/join/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.join.length, 1);
-
-verifyNotEnumerable(Array.prototype.join, 'length');
-verifyNotWritable(Array.prototype.join, 'length');
-verifyConfigurable(Array.prototype.join, 'length');
+verifyProperty(Array.prototype.join, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/name.js b/js/src/tests/test262/built-ins/Array/prototype/join/name.js
index 3af90e214e..536c306f82 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/join/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.join.name, "join");
-
-verifyNotEnumerable(Array.prototype.join, "name");
-verifyNotWritable(Array.prototype.join, "name");
-verifyConfigurable(Array.prototype.join, "name");
+verifyProperty(Array.prototype.join, "name", {
+  value: "join",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/join/not-a-constructor.js
index e92cd56335..f0953d9206 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/join/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.join), false, 'isConstructor(Arra
 
 assert.throws(TypeError, () => {
   new Array.prototype.join();
-}, '`new Array.prototype.join()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/length.js b/js/src/tests/test262/built-ins/Array/prototype/keys/length.js
index 6d997e5972..160dea0a2d 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/keys/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/length.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.keys.length, 0,
-  'The value of `Array.prototype.keys.length` is `0`'
-);
-
-verifyNotEnumerable(Array.prototype.keys, 'length');
-verifyNotWritable(Array.prototype.keys, 'length');
-verifyConfigurable(Array.prototype.keys, 'length');
+verifyProperty(Array.prototype.keys, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/name.js b/js/src/tests/test262/built-ins/Array/prototype/keys/name.js
index 11ea5c508f..c20e6a2b6f 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/keys/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/name.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  Array.prototype.keys.name, 'keys',
-  'The value of `Array.prototype.keys.name` is `"keys"`'
-);
-
-verifyNotEnumerable(Array.prototype.keys, 'name');
-verifyNotWritable(Array.prototype.keys, 'name');
-verifyConfigurable(Array.prototype.keys, 'name');
+verifyProperty(Array.prototype.keys, "name", {
+  value: "keys",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/keys/not-a-constructor.js
index 8d0b5db966..4207eebb9b 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/keys/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.keys), false, 'isConstructor(Arra
 
 assert.throws(TypeError, () => {
   new Array.prototype.keys();
-}, '`new Array.prototype.keys()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length.js
index 56b0fd7f8b..71ba258f1b 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.lastIndexOf.length, 1);
-
-verifyNotEnumerable(Array.prototype.lastIndexOf, 'length');
-verifyNotWritable(Array.prototype.lastIndexOf, 'length');
-verifyConfigurable(Array.prototype.lastIndexOf, 'length');
+verifyProperty(Array.prototype.lastIndexOf, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/name.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/name.js
index 1ab52079e3..d2990a8553 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.lastIndexOf.name, "lastIndexOf");
-
-verifyNotEnumerable(Array.prototype.lastIndexOf, "name");
-verifyNotWritable(Array.prototype.lastIndexOf, "name");
-verifyConfigurable(Array.prototype.lastIndexOf, "name");
+verifyProperty(Array.prototype.lastIndexOf, "name", {
+  value: "lastIndexOf",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/not-a-constructor.js
index e3d126b8f9..076d85fcc9 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.lastIndexOf();
-}, '`new Array.prototype.lastIndexOf()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/map/callbackfn-resize-arraybuffer.js
index ec8caa847e..5496a2090a 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/map/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/length.js b/js/src/tests/test262/built-ins/Array/prototype/map/length.js
index f0402be9c5..9eacb86642 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/map/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.map.length, 1);
-
-verifyNotEnumerable(Array.prototype.map, 'length');
-verifyNotWritable(Array.prototype.map, 'length');
-verifyConfigurable(Array.prototype.map, 'length');
+verifyProperty(Array.prototype.map, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/name.js b/js/src/tests/test262/built-ins/Array/prototype/map/name.js
index 75a94bbb83..c18af83c3f 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/map/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.map.name, "map");
-
-verifyNotEnumerable(Array.prototype.map, "name");
-verifyNotWritable(Array.prototype.map, "name");
-verifyConfigurable(Array.prototype.map, "name");
+verifyProperty(Array.prototype.map, "name", {
+  value: "map",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/map/not-a-constructor.js
index 98945bd366..8c54276eea 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/map/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.map), false, 'isConstructor(Array
 
 assert.throws(TypeError, () => {
   new Array.prototype.map(() => {});
-}, '`new Array.prototype.map(() => {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/length.js b/js/src/tests/test262/built-ins/Array/prototype/pop/length.js
index 6285c752f0..2f0ec4f16e 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/pop/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.pop.length, 0);
-
-verifyNotEnumerable(Array.prototype.pop, 'length');
-verifyNotWritable(Array.prototype.pop, 'length');
-verifyConfigurable(Array.prototype.pop, 'length');
+verifyProperty(Array.prototype.pop, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/name.js b/js/src/tests/test262/built-ins/Array/prototype/pop/name.js
index 891fb91858..19b678268a 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/pop/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.pop.name, "pop");
-
-verifyNotEnumerable(Array.prototype.pop, "name");
-verifyNotWritable(Array.prototype.pop, "name");
-verifyConfigurable(Array.prototype.pop, "name");
+verifyProperty(Array.prototype.pop, "name", {
+  value: "pop",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/pop/not-a-constructor.js
index 849c2b3305..ac67502c7e 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/pop/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.pop), false, 'isConstructor(Array
 
 assert.throws(TypeError, () => {
   new Array.prototype.pop();
-}, '`new Array.prototype.pop()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/length.js b/js/src/tests/test262/built-ins/Array/prototype/push/length.js
index d503ab3cfa..4df58993dd 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/push/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/length.js
@@ -25,10 +25,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.push.length, 1);
-
-verifyNotEnumerable(Array.prototype.push, 'length');
-verifyNotWritable(Array.prototype.push, 'length');
-verifyConfigurable(Array.prototype.push, 'length');
+verifyProperty(Array.prototype.push, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/name.js b/js/src/tests/test262/built-ins/Array/prototype/push/name.js
index 42e2e96314..1590bdf48b 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/push/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.push.name, "push");
-
-verifyNotEnumerable(Array.prototype.push, "name");
-verifyNotWritable(Array.prototype.push, "name");
-verifyConfigurable(Array.prototype.push, "name");
+verifyProperty(Array.prototype.push, "name", {
+  value: "push",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/push/not-a-constructor.js
index 291b72867d..f709507f93 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/push/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.push), false, 'isConstructor(Arra
 
 assert.throws(TypeError, () => {
   new Array.prototype.push();
-}, '`new Array.prototype.push()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/callbackfn-resize-arraybuffer.js
index 7196680bec..cead90d05f 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reduce/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/length.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/length.js
index 46705546bd..4ed6ddc04a 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reduce/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.reduce.length, 1);
-
-verifyNotEnumerable(Array.prototype.reduce, 'length');
-verifyNotWritable(Array.prototype.reduce, 'length');
-verifyConfigurable(Array.prototype.reduce, 'length');
+verifyProperty(Array.prototype.reduce, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/name.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/name.js
index 0b368568bd..83b9a265e8 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reduce/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.reduce.name, "reduce");
-
-verifyNotEnumerable(Array.prototype.reduce, "name");
-verifyNotWritable(Array.prototype.reduce, "name");
-verifyConfigurable(Array.prototype.reduce, "name");
+verifyProperty(Array.prototype.reduce, "name", {
+  value: "reduce",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/not-a-constructor.js
index 66a7e1f277..719facd021 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reduce/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.reduce(() => {}, []);
-}, '`new Array.prototype.reduce(() => {}, [])` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/callbackfn-resize-arraybuffer.js
index 8704bccee9..bf2ee11cc8 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/length.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/length.js
index 4f02036c8d..9a2e44850c 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.reduceRight.length, 1);
-
-verifyNotEnumerable(Array.prototype.reduceRight, 'length');
-verifyNotWritable(Array.prototype.reduceRight, 'length');
-verifyConfigurable(Array.prototype.reduceRight, 'length');
+verifyProperty(Array.prototype.reduceRight, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/name.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/name.js
index c3e90f6957..b4a4060073 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.reduceRight.name, "reduceRight");
-
-verifyNotEnumerable(Array.prototype.reduceRight, "name");
-verifyNotWritable(Array.prototype.reduceRight, "name");
-verifyConfigurable(Array.prototype.reduceRight, "name");
+verifyProperty(Array.prototype.reduceRight, "name", {
+  value: "reduceRight",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/not-a-constructor.js
index 77e7e825b3..b42a04f7fc 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.reduceRight(() => {}, []);
-}, '`new Array.prototype.reduceRight(() => {}, [])` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/length.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/length.js
index fb5562c43d..f55bae44fe 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reverse/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.reverse.length, 0);
-
-verifyNotEnumerable(Array.prototype.reverse, 'length');
-verifyNotWritable(Array.prototype.reverse, 'length');
-verifyConfigurable(Array.prototype.reverse, 'length');
+verifyProperty(Array.prototype.reverse, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/name.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/name.js
index 450398c5d7..a964c72a4f 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reverse/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.reverse.name, "reverse");
-
-verifyNotEnumerable(Array.prototype.reverse, "name");
-verifyNotWritable(Array.prototype.reverse, "name");
-verifyConfigurable(Array.prototype.reverse, "name");
+verifyProperty(Array.prototype.reverse, "name", {
+  value: "reverse",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/not-a-constructor.js
index 693a459165..2f25d7a324 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/reverse/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.reverse();
-}, '`new Array.prototype.reverse()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/length.js b/js/src/tests/test262/built-ins/Array/prototype/shift/length.js
index 08932c056d..447527ea3b 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/shift/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.shift.length, 0);
-
-verifyNotEnumerable(Array.prototype.shift, 'length');
-verifyNotWritable(Array.prototype.shift, 'length');
-verifyConfigurable(Array.prototype.shift, 'length');
+verifyProperty(Array.prototype.shift, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/name.js b/js/src/tests/test262/built-ins/Array/prototype/shift/name.js
index a64cdab03f..0091e7e2cc 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/shift/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.shift.name, "shift");
-
-verifyNotEnumerable(Array.prototype.shift, "name");
-verifyNotWritable(Array.prototype.shift, "name");
-verifyConfigurable(Array.prototype.shift, "name");
+verifyProperty(Array.prototype.shift, "name", {
+  value: "shift",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/shift/not-a-constructor.js
index b58cbbb0fa..160d30240b 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/shift/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.shift();
-}, '`new Array.prototype.shift()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/length.js b/js/src/tests/test262/built-ins/Array/prototype/slice/length.js
index 2d0204600c..21d3dcae6f 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/slice/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.slice.length, 2);
-
-verifyNotEnumerable(Array.prototype.slice, 'length');
-verifyNotWritable(Array.prototype.slice, 'length');
-verifyConfigurable(Array.prototype.slice, 'length');
+verifyProperty(Array.prototype.slice, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/name.js b/js/src/tests/test262/built-ins/Array/prototype/slice/name.js
index b870be1e66..6a37b962e5 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/slice/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.slice.name, "slice");
-
-verifyNotEnumerable(Array.prototype.slice, "name");
-verifyNotWritable(Array.prototype.slice, "name");
-verifyConfigurable(Array.prototype.slice, "name");
+verifyProperty(Array.prototype.slice, "name", {
+  value: "slice",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/slice/not-a-constructor.js
index 3504fae508..08d6eb8820 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/slice/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.slice();
-}, '`new Array.prototype.slice()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/some/callbackfn-resize-arraybuffer.js
index 0f42d15717..009ee20914 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/some/callbackfn-resize-arraybuffer.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/callbackfn-resize-arraybuffer.js
@@ -1,4 +1,4 @@
-// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/length.js b/js/src/tests/test262/built-ins/Array/prototype/some/length.js
index 4afccd4124..91e160e62e 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/some/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.some.length, 1);
-
-verifyNotEnumerable(Array.prototype.some, 'length');
-verifyNotWritable(Array.prototype.some, 'length');
-verifyConfigurable(Array.prototype.some, 'length');
+verifyProperty(Array.prototype.some, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/name.js b/js/src/tests/test262/built-ins/Array/prototype/some/name.js
index 3ccefd3f61..1c6748df51 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/some/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.some.name, "some");
-
-verifyNotEnumerable(Array.prototype.some, "name");
-verifyNotWritable(Array.prototype.some, "name");
-verifyConfigurable(Array.prototype.some, "name");
+verifyProperty(Array.prototype.some, "name", {
+  value: "some",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/some/not-a-constructor.js
index cff54f8d96..ea2d642790 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/some/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.some), false, 'isConstructor(Arra
 
 assert.throws(TypeError, () => {
   new Array.prototype.some(() => {});
-}, '`new Array.prototype.some(() => {})` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/length.js b/js/src/tests/test262/built-ins/Array/prototype/sort/length.js
index 67a6be2969..2c386f8955 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/sort/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.sort.length, 1);
-
-verifyNotEnumerable(Array.prototype.sort, 'length');
-verifyNotWritable(Array.prototype.sort, 'length');
-verifyConfigurable(Array.prototype.sort, 'length');
+verifyProperty(Array.prototype.sort, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/name.js b/js/src/tests/test262/built-ins/Array/prototype/sort/name.js
index 5ec58a1bb8..631cdd1816 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/sort/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.sort.name, "sort");
-
-verifyNotEnumerable(Array.prototype.sort, "name");
-verifyNotWritable(Array.prototype.sort, "name");
-verifyConfigurable(Array.prototype.sort, "name");
+verifyProperty(Array.prototype.sort, "name", {
+  value: "sort",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/sort/not-a-constructor.js
index e9dd5a40d3..b5cf5325a8 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/sort/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Array.prototype.sort), false, 'isConstructor(Arra
 
 assert.throws(TypeError, () => {
   new Array.prototype.sort();
-}, '`new Array.prototype.sort()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/length.js b/js/src/tests/test262/built-ins/Array/prototype/splice/length.js
index d701b42ae5..051503da45 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/splice/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.splice.length, 2);
-
-verifyNotEnumerable(Array.prototype.splice, 'length');
-verifyNotWritable(Array.prototype.splice, 'length');
-verifyConfigurable(Array.prototype.splice, 'length');
+verifyProperty(Array.prototype.splice, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/name.js b/js/src/tests/test262/built-ins/Array/prototype/splice/name.js
index a0107f69c4..4255958303 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/splice/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.splice.name, "splice");
-
-verifyNotEnumerable(Array.prototype.splice, "name");
-verifyNotWritable(Array.prototype.splice, "name");
-verifyConfigurable(Array.prototype.splice, "name");
+verifyProperty(Array.prototype.splice, "name", {
+  value: "splice",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/splice/not-a-constructor.js
index 674f869d3a..a19d07703c 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/splice/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.splice();
-}, '`new Array.prototype.splice()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/length.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/length.js
index bc24898e1e..03232222e7 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/length.js
@@ -21,10 +21,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.toLocaleString.length, 0);
-
-verifyNotEnumerable(Array.prototype.toLocaleString, 'length');
-verifyNotWritable(Array.prototype.toLocaleString, 'length');
-verifyConfigurable(Array.prototype.toLocaleString, 'length');
+verifyProperty(Array.prototype.toLocaleString, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/name.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/name.js
index 54f2c57bcb..418664ead2 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.toLocaleString.name, "toLocaleString");
-
-verifyNotEnumerable(Array.prototype.toLocaleString, "name");
-verifyNotWritable(Array.prototype.toLocaleString, "name");
-verifyConfigurable(Array.prototype.toLocaleString, "name");
+verifyProperty(Array.prototype.toLocaleString, "name", {
+  value: "toLocaleString",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/not-a-constructor.js
index def6d25864..b040fae76f 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.toLocaleString();
-}, '`new Array.prototype.toLocaleString()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/not-a-constructor.js
index 6e848442c9..3b32ac58e3 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toReversed/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.toReversed();
-}, '`new Array.prototype.toReversed()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/this-value-nullish.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/this-value-nullish.js
index 682b28addf..1ebdb006c3 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toReversed/this-value-nullish.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/this-value-nullish.js
@@ -15,10 +15,10 @@ features: [change-array-by-copy]
 
 assert.throws(TypeError, () => {
   Array.prototype.toReversed.call(null);
-}, '`Array.prototype.toReversed.call(null)` throws TypeError');
+});
 
 assert.throws(TypeError, () => {
   Array.prototype.toReversed.call(undefined);
-}, '`Array.prototype.toReversed.call(undefined)` throws TypeError');
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/not-a-constructor.js
index dda671c3ee..bd2a05683d 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toSorted/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.toSorted();
-}, '`new Array.prototype.toSorted()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/this-value-nullish.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/this-value-nullish.js
index 65690075df..20f9664dfa 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toSorted/this-value-nullish.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/this-value-nullish.js
@@ -15,10 +15,10 @@ features: [change-array-by-copy]
 
 assert.throws(TypeError, () => {
   Array.prototype.toSorted.call(null);
-}, '`Array.prototype.toSorted.call(null)` throws TypeError');
+});
 
 assert.throws(TypeError, () => {
   Array.prototype.toSorted.call(undefined);
-}, '`Array.prototype.toSorted.call(undefined)` throws TypeError');
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/not-a-constructor.js
index 533e8c9eaa..34b5f34f00 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/not-a-constructor.js
@@ -29,6 +29,6 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.toSpliced();
-}, '`new Array.prototype.toSpliced()` throws TypeError');
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/length.js b/js/src/tests/test262/built-ins/Array/prototype/toString/length.js
index d9f0df584e..7b73cc2f87 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toString/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.toString.length, 0);
-
-verifyNotEnumerable(Array.prototype.toString, "length");
-verifyNotWritable(Array.prototype.toString, "length");
-verifyConfigurable(Array.prototype.toString, "length");
+verifyProperty(Array.prototype.toString, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/name.js b/js/src/tests/test262/built-ins/Array/prototype/toString/name.js
index d3fc9528d9..2bd19a5f84 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toString/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.toString.name, "toString");
-
-verifyNotEnumerable(Array.prototype.toString, "name");
-verifyNotWritable(Array.prototype.toString, "name");
-verifyConfigurable(Array.prototype.toString, "name");
+verifyProperty(Array.prototype.toString, "name", {
+  value: "toString",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/toString/not-a-constructor.js
index a70534ffd1..630f0301fa 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/toString/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.toString();
-}, '`new Array.prototype.toString()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/length.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/length.js
index e99bffa6d8..5538fb52aa 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/unshift/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/length.js
@@ -25,10 +25,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.unshift.length, 1);
-
-verifyNotEnumerable(Array.prototype.unshift, 'length');
-verifyNotWritable(Array.prototype.unshift, 'length');
-verifyConfigurable(Array.prototype.unshift, 'length');
+verifyProperty(Array.prototype.unshift, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/name.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/name.js
index 4caa8c29b4..320911e6fe 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/unshift/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.unshift.name, "unshift");
-
-verifyNotEnumerable(Array.prototype.unshift, "name");
-verifyNotWritable(Array.prototype.unshift, "name");
-verifyConfigurable(Array.prototype.unshift, "name");
+verifyProperty(Array.prototype.unshift, "name", {
+  value: "unshift",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/not-a-constructor.js
index 415a6e738d..2f308932d8 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/unshift/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.unshift();
-}, '`new Array.prototype.unshift()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/length.js b/js/src/tests/test262/built-ins/Array/prototype/values/length.js
index c87379d29f..850153c7a7 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/values/length.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/length.js
@@ -18,10 +18,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.values.length, 0);
-
-verifyNotEnumerable(Array.prototype.values, 'length');
-verifyNotWritable(Array.prototype.values, 'length');
-verifyConfigurable(Array.prototype.values, 'length');
+verifyProperty(Array.prototype.values, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/name.js b/js/src/tests/test262/built-ins/Array/prototype/values/name.js
index 71eb0fb243..0c311c38e7 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/values/name.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Array.prototype.values.name, 'values');
-
-verifyNotEnumerable(Array.prototype.values, 'name');
-verifyNotWritable(Array.prototype.values, 'name');
-verifyConfigurable(Array.prototype.values, 'name');
+verifyProperty(Array.prototype.values, "name", {
+  value: "values",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/values/not-a-constructor.js
index 2afdde1e37..3ef19e5a4e 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/values/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.values();
-}, '`new Array.prototype.values()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/with/not-a-constructor.js
index 257a21aa51..4d0e060ee4 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/with/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Array.prototype.with();
-}, '`new Array.prototype.with()` throws TypeError');
+});
 
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/this-value-nullish.js b/js/src/tests/test262/built-ins/Array/prototype/with/this-value-nullish.js
index befef0642d..64f029d55e 100644
--- a/js/src/tests/test262/built-ins/Array/prototype/with/this-value-nullish.js
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/this-value-nullish.js
@@ -15,10 +15,10 @@ features: [change-array-by-copy]
 
 assert.throws(TypeError, () => {
   Array.prototype.with.call(null, 0, 0);
-}, '`Array.prototype.with.call(null, 0, 0)` throws TypeError');
+});
 
 assert.throws(TypeError, () => {
   Array.prototype.with.call(undefined, 0, 0);
-}, '`Array.prototype.with.call(undefined, 0, 0)` throws TypeError');
+});
 
 reportCompare(0, 0);