3 files changed, 13 insertions, 17 deletions
diff --git a/js/src/tests/test262/built-ins/Reflect/preventExtensions/length.js b/js/src/tests/test262/built-ins/Reflect/preventExtensions/length.js
index ee474224bf..35fa687d4c 100644
--- a/js/src/tests/test262/built-ins/Reflect/preventExtensions/length.js
+++ b/js/src/tests/test262/built-ins/Reflect/preventExtensions/length.js
@@ -8,13 +8,11 @@ includes: [propertyHelper.js]
 features: [Reflect]
 ---*/
 
-assert.sameValue(
-  Reflect.preventExtensions.length, 1,
-  'The value of `Reflect.preventExtensions.length` is `1`'
-);
-
-verifyNotEnumerable(Reflect.preventExtensions, 'length');
-verifyNotWritable(Reflect.preventExtensions, 'length');
-verifyConfigurable(Reflect.preventExtensions, 'length');
+verifyProperty(Reflect.preventExtensions, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Reflect/preventExtensions/name.js b/js/src/tests/test262/built-ins/Reflect/preventExtensions/name.js
index 802a6efbb6..62148cd873 100644
--- a/js/src/tests/test262/built-ins/Reflect/preventExtensions/name.js
+++ b/js/src/tests/test262/built-ins/Reflect/preventExtensions/name.js
@@ -13,13 +13,11 @@ includes: [propertyHelper.js]
 features: [Reflect]
 ---*/
 
-assert.sameValue(
-  Reflect.preventExtensions.name, 'preventExtensions',
-  'The value of `Reflect.preventExtensions.name` is `"preventExtensions"`'
-);
-
-verifyNotEnumerable(Reflect.preventExtensions, 'name');
-verifyNotWritable(Reflect.preventExtensions, 'name');
-verifyConfigurable(Reflect.preventExtensions, 'name');
+verifyProperty(Reflect.preventExtensions, "name", {
+  value: "preventExtensions",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Reflect/preventExtensions/not-a-constructor.js b/js/src/tests/test262/built-ins/Reflect/preventExtensions/not-a-constructor.js
index 9157e1a265..ae86ac9ee5 100644
--- a/js/src/tests/test262/built-ins/Reflect/preventExtensions/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Reflect/preventExtensions/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Reflect.preventExtensions({});
-}, '`new Reflect.preventExtensions({})` throws TypeError');
+});
 
 
 reportCompare(0, 0);