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diff --git a/js/src/tests/test262/language/statements/class/subclass/builtin-objects/GeneratorFunction/regular-subclassing.js b/js/src/tests/test262/language/statements/class/subclass/builtin-objects/GeneratorFunction/regular-subclassing.js
new file mode 100644
index 0000000000..55a8c2ded5
--- /dev/null
+++ b/js/src/tests/test262/language/statements/class/subclass/builtin-objects/GeneratorFunction/regular-subclassing.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 25.2.1
+description: Subclassing GeneratorFunction
+info: |
+  25.2.1 The GeneratorFunction Constructor
+
+  ...
+
+  GeneratorFunction is designed to be subclassable. It may be used as the value
+  of an extends clause of a class definition. Subclass constructors that intend
+  to inherit the specified GeneratorFunction behaviour must include a super call
+  to the GeneratorFunction constructor to create and initialize subclass
+  instances with the internal slots necessary for built-in GeneratorFunction
+  behaviour.
+  ...
+---*/
+
+var GeneratorFunction = Object.getPrototypeOf(function* () {}).constructor;
+
+class Gfn extends GeneratorFunction {}
+
+var gfn = new Gfn('a', 'yield a; yield a * 2;');
+
+var iter = gfn(42);
+
+assert.sameValue(iter.next().value, 42);
+assert.sameValue(iter.next().value, 84);
+
+reportCompare(0, 0);