3 files changed, 13 insertions, 11 deletions
diff --git a/js/src/tests/test262/built-ins/Error/prototype/toString/length.js b/js/src/tests/test262/built-ins/Error/prototype/toString/length.js
index 0f6d033b73..faad9af1be 100644
--- a/js/src/tests/test262/built-ins/Error/prototype/toString/length.js
+++ b/js/src/tests/test262/built-ins/Error/prototype/toString/length.js
@@ -22,10 +22,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Error.prototype.toString.length, 0);
-
-verifyNotEnumerable(Error.prototype.toString, "length");
-verifyNotWritable(Error.prototype.toString, "length");
-verifyConfigurable(Error.prototype.toString, "length");
+verifyProperty(Error.prototype.toString, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Error/prototype/toString/name.js b/js/src/tests/test262/built-ins/Error/prototype/toString/name.js
index 8896e27dcf..23bdcd8c84 100644
--- a/js/src/tests/test262/built-ins/Error/prototype/toString/name.js
+++ b/js/src/tests/test262/built-ins/Error/prototype/toString/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Error.prototype.toString.name, "toString");
-
-verifyNotEnumerable(Error.prototype.toString, "name");
-verifyNotWritable(Error.prototype.toString, "name");
-verifyConfigurable(Error.prototype.toString, "name");
+verifyProperty(Error.prototype.toString, "name", {
+  value: "toString",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Error/prototype/toString/not-a-constructor.js b/js/src/tests/test262/built-ins/Error/prototype/toString/not-a-constructor.js
index 884c05e62e..c4eb05f6c7 100644
--- a/js/src/tests/test262/built-ins/Error/prototype/toString/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Error/prototype/toString/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   new Error.prototype.toString();
-}, '`new Error.prototype.toString()` throws TypeError');
+});
 
 
 reportCompare(0, 0);