3 files changed, 13 insertions, 17 deletions
diff --git a/js/src/tests/test262/built-ins/WeakSet/prototype/delete/length.js b/js/src/tests/test262/built-ins/WeakSet/prototype/delete/length.js
index 516b074855..63d20118fd 100644
--- a/js/src/tests/test262/built-ins/WeakSet/prototype/delete/length.js
+++ b/js/src/tests/test262/built-ins/WeakSet/prototype/delete/length.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  WeakSet.prototype.delete.length, 1,
-  'The value of WeakSet.prototype.delete.length is 1'
-);
-
-verifyNotEnumerable(WeakSet.prototype.delete, 'length');
-verifyNotWritable(WeakSet.prototype.delete, 'length');
-verifyConfigurable(WeakSet.prototype.delete, 'length');
+verifyProperty(WeakSet.prototype.delete, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/WeakSet/prototype/delete/name.js b/js/src/tests/test262/built-ins/WeakSet/prototype/delete/name.js
index b759002e7c..da0d4f7fa3 100644
--- a/js/src/tests/test262/built-ins/WeakSet/prototype/delete/name.js
+++ b/js/src/tests/test262/built-ins/WeakSet/prototype/delete/name.js
@@ -12,13 +12,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(
-  WeakSet.prototype.delete.name, 'delete',
-  'The value of WeakSet.prototype.delete.name is "delete"'
-);
-
-verifyNotEnumerable(WeakSet.prototype.delete, 'name');
-verifyNotWritable(WeakSet.prototype.delete, 'name');
-verifyConfigurable(WeakSet.prototype.delete, 'name');
+verifyProperty(WeakSet.prototype.delete, "name", {
+  value: "delete",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/WeakSet/prototype/delete/not-a-constructor.js b/js/src/tests/test262/built-ins/WeakSet/prototype/delete/not-a-constructor.js
index 3f5c5605d0..b12b0c07f9 100644
--- a/js/src/tests/test262/built-ins/WeakSet/prototype/delete/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/WeakSet/prototype/delete/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   let ws = new WeakSet(); new ws.delete();
-}, '`let ws = new WeakSet(); new ws.delete()` throws TypeError');
+});
 
 
 reportCompare(0, 0);