3 files changed, 13 insertions, 11 deletions
diff --git a/js/src/tests/test262/built-ins/Math/cos/length.js b/js/src/tests/test262/built-ins/Math/cos/length.js
index b41d87ef73..b7c1feb4ab 100644
--- a/js/src/tests/test262/built-ins/Math/cos/length.js
+++ b/js/src/tests/test262/built-ins/Math/cos/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Math.cos.length, 1);
-
-verifyNotEnumerable(Math.cos, "length");
-verifyNotWritable(Math.cos, "length");
-verifyConfigurable(Math.cos, "length");
+verifyProperty(Math.cos, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Math/cos/name.js b/js/src/tests/test262/built-ins/Math/cos/name.js
index 88be1490d8..291819a099 100644
--- a/js/src/tests/test262/built-ins/Math/cos/name.js
+++ b/js/src/tests/test262/built-ins/Math/cos/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Math.cos.name, "cos");
-
-verifyNotEnumerable(Math.cos, "name");
-verifyNotWritable(Math.cos, "name");
-verifyConfigurable(Math.cos, "name");
+verifyProperty(Math.cos, "name", {
+  value: "cos",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Math/cos/not-a-constructor.js b/js/src/tests/test262/built-ins/Math/cos/not-a-constructor.js
index e86a689ccb..e680ae9ade 100644
--- a/js/src/tests/test262/built-ins/Math/cos/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Math/cos/not-a-constructor.js
@@ -25,7 +25,7 @@ assert.sameValue(isConstructor(Math.cos), false, 'isConstructor(Math.cos) must r
 
 assert.throws(TypeError, () => {
   new Math.cos();
-}, '`new Math.cos()` throws TypeError');
+});
 
 
 reportCompare(0, 0);