3 files changed, 13 insertions, 11 deletions
diff --git a/js/src/tests/test262/built-ins/Promise/prototype/then/length.js b/js/src/tests/test262/built-ins/Promise/prototype/then/length.js
index 1e865b0460..2ada466b80 100644
--- a/js/src/tests/test262/built-ins/Promise/prototype/then/length.js
+++ b/js/src/tests/test262/built-ins/Promise/prototype/then/length.js
@@ -18,10 +18,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Promise.prototype.then.length, 2);
-
-verifyNotEnumerable(Promise.prototype.then, 'length');
-verifyNotWritable(Promise.prototype.then, 'length');
-verifyConfigurable(Promise.prototype.then, 'length');
+verifyProperty(Promise.prototype.then, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Promise/prototype/then/name.js b/js/src/tests/test262/built-ins/Promise/prototype/then/name.js
index b1c97f9956..82402ea992 100644
--- a/js/src/tests/test262/built-ins/Promise/prototype/then/name.js
+++ b/js/src/tests/test262/built-ins/Promise/prototype/then/name.js
@@ -19,10 +19,11 @@ info: |
 includes: [propertyHelper.js]
 ---*/
 
-assert.sameValue(Promise.prototype.then.name, 'then');
-
-verifyNotEnumerable(Promise.prototype.then, 'name');
-verifyNotWritable(Promise.prototype.then, 'name');
-verifyConfigurable(Promise.prototype.then, 'name');
+verifyProperty(Promise.prototype.then, "name", {
+  value: "then",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Promise/prototype/then/not-a-constructor.js b/js/src/tests/test262/built-ins/Promise/prototype/then/not-a-constructor.js
index d943772f86..d04c89e111 100644
--- a/js/src/tests/test262/built-ins/Promise/prototype/then/not-a-constructor.js
+++ b/js/src/tests/test262/built-ins/Promise/prototype/then/not-a-constructor.js
@@ -29,7 +29,7 @@ assert.sameValue(
 
 assert.throws(TypeError, () => {
   let p = new Promise(() => {}); new p.then();
-}, '`let p = new Promise(() => {}); new p.then()` throws TypeError');
+});
 
 
 reportCompare(0, 0);