diff --git a/test/built-ins/WeakMap/prototype/constructor.js b/test/built-ins/WeakMap/prototype/constructor.js
new file mode 100644
index 0000000000..19ee90ee0d
--- /dev/null
+++ b/test/built-ins/WeakMap/prototype/constructor.js
@@ -0,0 +1,21 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 23.3.3.1
+description: >
+  WeakMap.prototype.constructor value and property descriptor
+info: >
+  The initial value of WeakMap.prototype.constructor is the %WeakMap%
+  intrinsic object.
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(WeakMap.prototype.constructor, WeakMap);
+assert.sameValue((new WeakMap()).constructor, WeakMap);
+
+verifyNotEnumerable(WeakMap.prototype, 'constructor');
+verifyWritable(WeakMap.prototype, 'constructor');
+verifyConfigurable(WeakMap.prototype, 'constructor');