2 files changed, 12 insertions, 14 deletions
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);