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diff --git a/js/src/tests/test262/built-ins/GeneratorPrototype/return/length.js b/js/src/tests/test262/built-ins/GeneratorPrototype/return/length.js
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+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es6id: 25.3.1.3
+description: >
+  Generator.prototype.return.length is 1.
+info: |
+  Generator.prototype.return ( value )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, has a length
+    property whose value is an integer. Unless otherwise specified, this
+    value is equal to the largest number of named arguments shown in the
+    subclause headings for the function description, including optional
+    parameters. However, rest parameters shown using the form “...name”
+    are not included in the default argument count.
+
+    Unless otherwise specified, the length property of a built-in Function
+    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [generators]
+---*/
+
+function* g() {}
+var GeneratorPrototype = Object.getPrototypeOf(g).prototype;
+
+assert.sameValue(GeneratorPrototype.return.length, 1);
+
+verifyNotEnumerable(GeneratorPrototype.return, "length");
+verifyNotWritable(GeneratorPrototype.return, "length");
+verifyConfigurable(GeneratorPrototype.return, "length");
+
+reportCompare(0, 0);