diff --git a/test/language/class/arguments/access.js b/test/language/class/arguments/access.js
new file mode 100644
index 0000000000..150ffaa135
--- /dev/null
+++ b/test/language/class/arguments/access.js
@@ -0,0 +1,54 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class arguments access
+---*/
+var constructCounts = {
+  base: 0,
+  subclass: 0,
+  subclass2: 0
+};
+
+class Base {
+  constructor() {
+    constructCounts.base++;
+    assert.sameValue(arguments.length, 2, "The value of `arguments.length` is `2`");
+    assert.sameValue(arguments[0], 1, "The value of `arguments[0]` is `1`");
+    assert.sameValue(arguments[1], 2, "The value of `arguments[1]` is `2`");
+  }
+}
+
+var b = new Base(1, 2);
+
+class Subclass extends Base {
+  constructor() {
+    constructCounts.subclass++;
+    assert.sameValue(arguments.length, 2, "The value of `arguments.length` is `2`");
+    assert.sameValue(arguments[0], 3, "The value of `arguments[0]` is `3`");
+    assert.sameValue(arguments[1], 4, "The value of `arguments[1]` is `4`");
+    super(1, 2);
+  }
+}
+
+var s = new Subclass(3, 4);
+assert.sameValue(Subclass.length, 0, "The value of `Subclass.length` is `0`, because there are 0 formal parameters");
+
+class Subclass2 extends Base {
+  constructor(x, y) {
+    constructCounts.subclass2++;
+    assert.sameValue(arguments.length, 2, "The value of `arguments.length` is `2`");
+    assert.sameValue(arguments[0], 3, "The value of `arguments[0]` is `3`");
+    assert.sameValue(arguments[1], 4, "The value of `arguments[1]` is `4`");
+    super(1, 2);
+  }
+}
+
+var s2 = new Subclass2(3, 4);
+assert.sameValue(Subclass2.length, 2, "The value of `Subclass2.length` is `2`, because there are 2 formal parameters");
+
+
+assert.sameValue(constructCounts.base, 3, "The value of `constructCounts.base` is `3`");
+assert.sameValue(constructCounts.subclass, 1, "The value of `constructCounts.subclass` is `1`");
+assert.sameValue(constructCounts.subclass2, 1, "The value of `constructCounts.subclass2` is `1`");
diff --git a/test/language/class/arguments/default-constructor.js b/test/language/class/arguments/default-constructor.js
new file mode 100644
index 0000000000..95b7957b89
--- /dev/null
+++ b/test/language/class/arguments/default-constructor.js
@@ -0,0 +1,30 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class default constructor arguments
+---*/
+var args, that;
+class Base {
+  constructor() {
+    that = this;
+    args = arguments;
+  }
+}
+class Derived extends Base {}
+
+new Derived;
+assert.sameValue(args.length, 0, "The value of `args.length` is `0`");
+
+new Derived(0, 1, 2);
+assert.sameValue(args.length, 3, "The value of `args.length` is `3`");
+assert.sameValue(
+  that instanceof Derived,
+  true,
+  "The result of `that instanceof Derived` is `true`"
+);
+
+var arr = new Array(100);
+var obj = {};
+assert.throws(TypeError, function() {Derived.apply(obj, arr);});
diff --git a/test/language/class/definition/accessors.js b/test/language/class/definition/accessors.js
new file mode 100644
index 0000000000..88d8ad2f22
--- /dev/null
+++ b/test/language/class/definition/accessors.js
@@ -0,0 +1,52 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class accessors
+---*/
+
+function assertAccessorDescriptor(object, name) {
+  var desc = Object.getOwnPropertyDescriptor(object, name);
+  assert.sameValue(desc.configurable, true, "The value of `desc.configurable` is `true`");
+  assert.sameValue(desc.enumerable, false, "The value of `desc.enumerable` is `false`");
+  assert.sameValue(typeof desc.get, 'function', "`typeof desc.get` is `'function'`");
+  assert.sameValue(typeof desc.set, 'function', "`typeof desc.set` is `'function'`");
+  assert.sameValue(
+    'prototype' in desc.get,
+    false,
+    "The result of `'prototype' in desc.get` is `false`"
+  );
+  assert.sameValue(
+    'prototype' in desc.set,
+    false,
+    "The result of `'prototype' in desc.set` is `false`"
+  );
+}
+
+
+class C {
+  constructor(x) {
+    this._x = x;
+  }
+
+  get x() { return this._x; }
+  set x(v) { this._x = v; }
+
+  static get staticX() { return this._x; }
+  static set staticX(v) { this._x = v; }
+}
+
+assertAccessorDescriptor(C.prototype, 'x');
+assertAccessorDescriptor(C, 'staticX');
+
+var c = new C(1);
+c._x = 1;
+assert.sameValue(c.x, 1, "The value of `c.x` is `1`, after executing `c._x = 1;`");
+c.x = 2;
+assert.sameValue(c._x, 2, "The value of `c._x` is `2`, after executing `c.x = 2;`");
+
+C._x = 3;
+assert.sameValue(C.staticX, 3, "The value of `C.staticX` is `3`, after executing `C._x = 3;`");
+C._x = 4;
+assert.sameValue(C.staticX, 4, "The value of `C.staticX` is `4`, after executing `C._x = 4;`");
diff --git a/test/language/class/definition/basics.js b/test/language/class/definition/basics.js
new file mode 100644
index 0000000000..c04e40a5e2
--- /dev/null
+++ b/test/language/class/definition/basics.js
@@ -0,0 +1,43 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class basics
+---*/
+var C = class C {}
+assert.sameValue(typeof C, 'function', "`typeof C` is `'function'`");
+assert.sameValue(
+    Object.getPrototypeOf(C.prototype),
+    Object.prototype,
+    "`Object.getPrototypeOf(C.prototype)` returns `Object.prototype`"
+);
+assert.sameValue(
+    Object.getPrototypeOf(C),
+    Function.prototype,
+    "`Object.getPrototypeOf(C)` returns `Function.prototype`"
+);
+assert.sameValue(C.name, 'C', "The value of `C.name` is `'C'`");
+
+class D {}
+assert.sameValue(typeof D, 'function', "`typeof D` is `'function'`");
+assert.sameValue(
+    Object.getPrototypeOf(D.prototype),
+    Object.prototype,
+    "`Object.getPrototypeOf(D.prototype)` returns `Object.prototype`"
+);
+assert.sameValue(
+    Object.getPrototypeOf(D),
+    Function.prototype,
+    "`Object.getPrototypeOf(D)` returns `Function.prototype`"
+);
+assert.sameValue(D.name, 'D', "The value of `D.name` is `'D'`");
+
+class D2 { constructor() {} }
+assert.sameValue(D2.name, 'D2', "The value of `D2.name` is `'D2'`");
+
+var E = class {}
+assert.sameValue(E.name, 'E', "The value of `E.name` is `'E'`");
+
+var F = class { constructor() {} };
+assert.sameValue(F.name, 'F', "The value of `F.name` is `'F'`");
diff --git a/test/language/class/definition/constructable-but-no-prototype.js b/test/language/class/definition/constructable-but-no-prototype.js
new file mode 100644
index 0000000000..b752ea7e04
--- /dev/null
+++ b/test/language/class/definition/constructable-but-no-prototype.js
@@ -0,0 +1,11 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class constructable but no prototype
+---*/
+var Base = function() {}.bind();
+assert.throws(TypeError, function() {
+  class C extends Base {}
+});
\ No newline at end of file
diff --git a/test/language/class/definition/constructor-property.js b/test/language/class/definition/constructor-property.js
new file mode 100644
index 0000000000..07fead4a97
--- /dev/null
+++ b/test/language/class/definition/constructor-property.js
@@ -0,0 +1,17 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class constructor property
+---*/
+class C {}
+assert.sameValue(
+    C,
+    C.prototype.constructor,
+    "The value of `C` is `C.prototype.constructor`"
+);
+var desc = Object.getOwnPropertyDescriptor(C.prototype, 'constructor');
+assert.sameValue(desc.configurable, true, "The value of `desc.configurable` is `true`, after executing `var desc = Object.getOwnPropertyDescriptor(C.prototype, 'constructor');`");
+assert.sameValue(desc.enumerable, false, "The value of `desc.enumerable` is `false`, after executing `var desc = Object.getOwnPropertyDescriptor(C.prototype, 'constructor');`");
+assert.sameValue(desc.writable, true, "The value of `desc.writable` is `true`, after executing `var desc = Object.getOwnPropertyDescriptor(C.prototype, 'constructor');`");
diff --git a/test/language/class/definition/constructor-strict-by-default.js b/test/language/class/definition/constructor-strict-by-default.js
new file mode 100644
index 0000000000..2e595e805d
--- /dev/null
+++ b/test/language/class/definition/constructor-strict-by-default.js
@@ -0,0 +1,15 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class constructor strict
+---*/
+class C {
+  constructor() {
+    assert.throws(ReferenceError, function() {
+      nonExistingBinding = 42;
+    });
+  }
+}
+new C();
\ No newline at end of file
diff --git a/test/language/class/definition/constructor.js b/test/language/class/definition/constructor.js
new file mode 100644
index 0000000000..d389545c01
--- /dev/null
+++ b/test/language/class/definition/constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class constructor
+---*/
+var count = 0;
+class C {
+  constructor() {
+    assert.sameValue(
+      Object.getPrototypeOf(this),
+      C.prototype,
+      "`Object.getPrototypeOf(this)` returns `C.prototype`"
+    );
+    count++;
+  }
+}
+assert.sameValue(
+  C,
+  C.prototype.constructor,
+  "The value of `C` is `C.prototype.constructor`"
+);
+var desc = Object.getOwnPropertyDescriptor(C.prototype, 'constructor');
+assert.sameValue(desc.configurable, true, "The value of `desc.configurable` is `true`, after executing `var desc = Object.getOwnPropertyDescriptor(C.prototype, 'constructor');`");
+assert.sameValue(desc.enumerable, false, "The value of `desc.enumerable` is `false`, after executing `var desc = Object.getOwnPropertyDescriptor(C.prototype, 'constructor');`");
+assert.sameValue(desc.writable, true, "The value of `descr.writable` is `true`, after executing `var desc = Object.getOwnPropertyDescriptor(C.prototype, 'constructor');`");
+
+var c = new C();
+assert.sameValue(count, 1, "The value of `count` is `1`");
+assert.sameValue(
+  Object.getPrototypeOf(c),
+  C.prototype,
+  "`Object.getPrototypeOf(c)` returns `C.prototype`"
+);
diff --git a/test/language/class/definition/getters-2.js b/test/language/class/definition/getters-2.js
new file mode 100644
index 0000000000..f52c879282
--- /dev/null
+++ b/test/language/class/definition/getters-2.js
@@ -0,0 +1,26 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class getters 2
+---*/
+class C {
+  get eval() {
+    return 1;
+  }
+  get arguments() {
+    return 2;
+  }
+  static get eval() {
+    return 3;
+  }
+  static get arguments() {
+    return 4;
+  }
+};
+
+assert.sameValue(new C().eval, 1, "The value of `new C().eval` is `1`");
+assert.sameValue(new C().arguments, 2, "The value of `new C().arguments` is `2`");
+assert.sameValue(C.eval, 3, "The value of `C.eval` is `3`");
+assert.sameValue(C.arguments, 4, "The value of `C.arguments` is `4`");
\ No newline at end of file
diff --git a/test/language/class/definition/getters.js b/test/language/class/definition/getters.js
new file mode 100644
index 0000000000..379de838a6
--- /dev/null
+++ b/test/language/class/definition/getters.js
@@ -0,0 +1,33 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class getters
+---*/
+
+function assertGetterDescriptor(object, name) {
+  var desc = Object.getOwnPropertyDescriptor(object, name);
+  assert.sameValue(desc.configurable, true, "The value of `desc.configurable` is `true`");
+  assert.sameValue(desc.enumerable, false, "The value of `desc.enumerable` is `false`");
+  assert.sameValue(typeof desc.get, 'function', "`typeof desc.get` is `'function'`");
+  assert.sameValue('prototype' in desc.get, false, "The result of `'prototype' in desc.get` is `false`");
+  assert.sameValue(desc.set, undefined, "The value of `desc.set` is `undefined`");
+}
+
+class C {
+  get x() { return 1; }
+  static get staticX() { return 2; }
+  get y() { return 3; }
+  static get staticY() { return 4; }
+}
+
+assertGetterDescriptor(C.prototype, 'x');
+assertGetterDescriptor(C.prototype, 'y');
+assertGetterDescriptor(C, 'staticX');
+assertGetterDescriptor(C, 'staticY');
+
+assert.sameValue(new C().x, 1, "The value of `new C().x` is `1`. Defined as `get x() { return 1; }`");
+assert.sameValue(C.staticX, 2, "The value of `C.staticX` is `2`. Defined as `static get staticX() { return 2; }`");
+assert.sameValue(new C().y, 3, "The value of `new C().y` is `3`. Defined as `get y() { return 3; }`");
+assert.sameValue(C.staticY, 4, "The value of `C.staticY` is `4`. Defined as `static get staticY() { return 4; }`");
diff --git a/test/language/class/definition/implicit-constructor.js b/test/language/class/definition/implicit-constructor.js
new file mode 100644
index 0000000000..985f1f3b46
--- /dev/null
+++ b/test/language/class/definition/implicit-constructor.js
@@ -0,0 +1,14 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class implicit constructor
+---*/
+class C {}
+var c = new C();
+assert.sameValue(
+    Object.getPrototypeOf(c),
+    C.prototype,
+    "`Object.getPrototypeOf(c)` returns `C.prototype`"
+);
\ No newline at end of file
diff --git a/test/language/class/definition/invalid-extends.js b/test/language/class/definition/invalid-extends.js
new file mode 100644
index 0000000000..3347cf4017
--- /dev/null
+++ b/test/language/class/definition/invalid-extends.js
@@ -0,0 +1,21 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class invalid extends
+---*/
+assert.throws(TypeError, function() {
+  class C extends 42 {}
+});
+
+assert.throws(TypeError, function() {
+  // Function but its .prototype is not null or a function.
+  class C extends Math.abs {}
+});
+
+assert.throws(TypeError, function() {
+  Math.abs.prototype = 42;
+  class C extends Math.abs {}
+});
+delete Math.abs.prototype;
\ No newline at end of file
diff --git a/test/language/class/definition/methods-named-eval-arguments.js b/test/language/class/definition/methods-named-eval-arguments.js
new file mode 100644
index 0000000000..416a4a62b1
--- /dev/null
+++ b/test/language/class/definition/methods-named-eval-arguments.js
@@ -0,0 +1,26 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class methods 2
+---*/
+class C {
+  eval() {
+    return 1;
+  }
+  arguments() {
+    return 2;
+  }
+  static eval() {
+    return 3;
+  }
+  static arguments() {
+    return 4;
+  }
+};
+
+assert.sameValue(new C().eval(), 1, "`new C().eval()` returns `1`");
+assert.sameValue(new C().arguments(), 2, "`new C().arguments()` returns `2`");
+assert.sameValue(C.eval(), 3, "`C.eval()` returns `3`");
+assert.sameValue(C.arguments(), 4, "`C.arguments()` returns `4`");
\ No newline at end of file
diff --git a/test/language/class/definition/methods.js b/test/language/class/definition/methods.js
new file mode 100644
index 0000000000..e2217990c1
--- /dev/null
+++ b/test/language/class/definition/methods.js
@@ -0,0 +1,32 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class methods
+---*/
+function assertMethodDescriptor(object, name) {
+  var desc = Object.getOwnPropertyDescriptor(object, name);
+  assert.sameValue(desc.configurable, true, "The value of `desc.configurable` is `true`");
+  assert.sameValue(desc.enumerable, false, "The value of `desc.enumerable` is `false`");
+  assert.sameValue(desc.writable, true, "The value of `desc.writable` is `true`");
+  assert.sameValue(typeof desc.value, 'function', "`typeof desc.value` is `'function'`");
+  assert.sameValue('prototype' in desc.value, false, "The result of `'prototype' in desc.value` is `false`");
+}
+
+class C {
+  method() { return 1; }
+  static staticMethod() { return 2; }
+  method2() { return 3; }
+  static staticMethod2() { return 4; }
+}
+
+assertMethodDescriptor(C.prototype, 'method');
+assertMethodDescriptor(C.prototype, 'method2');
+assertMethodDescriptor(C, 'staticMethod');
+assertMethodDescriptor(C, 'staticMethod2');
+
+assert.sameValue(new C().method(), 1, "`new C().method()` returns `1`. Defined as `method() { return 1; }`");
+assert.sameValue(C.staticMethod(), 2, "`C.staticMethod()` returns `2`. Defined as `static staticMethod() { return 2; }`");
+assert.sameValue(new C().method2(), 3, "`new C().method2()` returns `3`. Defined as `method2() { return 3; }`");
+assert.sameValue(C.staticMethod2(), 4, "`C.staticMethod2()` returns `4`. Defined as `static staticMethod2() { return 4; }`");
diff --git a/test/language/class/definition/numeric-property-names.js b/test/language/class/definition/numeric-property-names.js
new file mode 100644
index 0000000000..42d880f464
--- /dev/null
+++ b/test/language/class/definition/numeric-property-names.js
@@ -0,0 +1,63 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class numeric property names
+---*/
+function assertMethodDescriptor(object, name) {
+  var desc = Object.getOwnPropertyDescriptor(object, name);
+  assert.sameValue(desc.configurable, true, "The value of `desc.configurable` is `true`");
+  assert.sameValue(desc.enumerable, false, "The value of `desc.enumerable` is `false`");
+  assert.sameValue(desc.writable, true, "The value of `desc.writable` is `true`");
+  assert.sameValue(typeof desc.value, 'function', "`typeof desc.value` is `'function'`");
+  assert.sameValue('prototype' in desc.value, false, "The result of `'prototype' in desc.value` is `false`");
+}
+
+function assertGetterDescriptor(object, name) {
+  var desc = Object.getOwnPropertyDescriptor(object, name);
+  assert.sameValue(desc.configurable, true, "The value of `desc.configurable` is `true`");
+  assert.sameValue(desc.enumerable, false, "The value of `desc.enumerable` is `false`");
+  assert.sameValue(typeof desc.get, 'function', "`typeof desc.get` is `'function'`");
+  assert.sameValue('prototype' in desc.get, false, "The result of `'prototype' in desc.get` is `false`");
+  assert.sameValue(desc.set, undefined, "The value of `desc.set` is `undefined`");
+}
+
+function assertSetterDescriptor(object, name) {
+  var desc = Object.getOwnPropertyDescriptor(object, name);
+  assert.sameValue(desc.configurable, true, "The value of `desc.configurable` is `true`");
+  assert.sameValue(desc.enumerable, false, "The value of `desc.enumerable` is `false`");
+  assert.sameValue(typeof desc.set, 'function', "`typeof desc.set` is `'function'`");
+  assert.sameValue('prototype' in desc.set, false, "The result of `'prototype' in desc.set` is `false`");
+  assert.sameValue(desc.get, undefined, "The value of `desc.get` is `undefined`");
+}
+
+class B {
+  1() { return 1; }
+  get 2() { return 2; }
+  set 3(_) {}
+
+  static 4() { return 4; }
+  static get 5() { return 5; }
+  static set 6(_) {}
+}
+
+assertMethodDescriptor(B.prototype, '1');
+assertGetterDescriptor(B.prototype, '2');
+assertSetterDescriptor(B.prototype, '3');
+
+assertMethodDescriptor(B, '4');
+assertGetterDescriptor(B, '5');
+assertSetterDescriptor(B, '6');
+
+class C extends B {
+  1() { return super[1](); }
+  get 2() { return super[2]; }
+  static 4() { return super[4](); }
+  static get 5() { return super[5]; }
+}
+
+assert.sameValue(new C()[1](), 1, "`new C()[1]()` returns `1`. Defined as `1() { return super[1](); }`");
+assert.sameValue(new C()[2], 2, "The value of `new C()[2]` is `2`. Defined as `get 2() { return super[2]; }`");
+assert.sameValue(C[4](), 4, "`C[4]()` returns `4`. Defined as `static 4() { return super[4](); }`");
+assert.sameValue(C[5], 5, "The value of `C[5]` is `5`. Defined as `static get 5() { return super[5]; }`");
diff --git a/test/language/class/definition/prototype-getter.js b/test/language/class/definition/prototype-getter.js
new file mode 100644
index 0000000000..5ff510e3eb
--- /dev/null
+++ b/test/language/class/definition/prototype-getter.js
@@ -0,0 +1,31 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class prototype getter
+---*/
+var calls = 0;
+var Base = function() {}.bind();
+Object.defineProperty(Base, 'prototype', {
+  get: function() {
+    calls++;
+    return null;
+  },
+  configurable: true
+});
+class C extends Base {}
+assert.sameValue(calls, 1, "The value of `calls` is `1`");
+
+calls = 0;
+Object.defineProperty(Base, 'prototype', {
+  get: function() {
+    calls++;
+    return 42;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  class C extends Base {}
+});
+assert.sameValue(calls, 1, "The value of `calls` is `1`");
\ No newline at end of file
diff --git a/test/language/class/definition/prototype-property.js b/test/language/class/definition/prototype-property.js
new file mode 100644
index 0000000000..526e8869d7
--- /dev/null
+++ b/test/language/class/definition/prototype-property.js
@@ -0,0 +1,12 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class prototype property
+---*/
+class C {}
+var descr = Object.getOwnPropertyDescriptor(C, 'prototype');
+assert.sameValue(descr.configurable, false, "The value of `descr.configurable` is `false`");
+assert.sameValue(descr.enumerable, false, "The value of `descr.enumerable` is `false`");
+assert.sameValue(descr.writable, false, "The value of `descr.writable` is `false`");
\ No newline at end of file
diff --git a/test/language/class/definition/prototype-setter.js b/test/language/class/definition/prototype-setter.js
new file mode 100644
index 0000000000..95b61f16f1
--- /dev/null
+++ b/test/language/class/definition/prototype-setter.js
@@ -0,0 +1,16 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class prototype setter
+---*/
+var Base = function() {}.bind();
+Object.defineProperty(Base, 'prototype', {
+  set: function() {
+    $ERROR("Cannot create a setter property named `prototype`");
+  }
+});
+assert.throws(TypeError, function() {
+  class C extends Base {}
+});
diff --git a/test/language/class/definition/prototype-wiring.js b/test/language/class/definition/prototype-wiring.js
new file mode 100644
index 0000000000..4085aa57ee
--- /dev/null
+++ b/test/language/class/definition/prototype-wiring.js
@@ -0,0 +1,73 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class prototype wiring
+---*/
+
+class Base {
+  constructor(x) {
+    this.foobar = x;
+  }
+}
+
+class Subclass extends Base {
+  constructor(x) {
+    super(x);
+  }
+}
+
+var s = new Subclass(1);
+assert.sameValue(s.foobar, 1, "The value of `s.foobar` is `1`");
+assert.sameValue(
+  Object.getPrototypeOf(s),
+  Subclass.prototype,
+  "`Object.getPrototypeOf(s)` returns `Subclass.prototype`"
+);
+
+var s1 = new Subclass(1, 2);
+assert.sameValue(s1.foobar, 1, "The value of `s1.foobar` is `1`");
+assert.sameValue(
+  Object.getPrototypeOf(s1) === Subclass.prototype,
+  true,
+  "The result of `Object.getPrototypeOf(s1) === Subclass.prototype` is `true`"
+);
+
+var s2 = new Subclass();
+assert.sameValue(s2.foobar, undefined, "The value of `s2.foobar` is `undefined`");
+assert.sameValue(
+  Object.getPrototypeOf(s2),
+  Subclass.prototype,
+  "`Object.getPrototypeOf(s2)` returns `Subclass.prototype`"
+);
+assert.throws(TypeError, function() { Subclass(1); });
+assert.throws(TypeError, function() { Subclass(1,2,3,4); });
+
+class Subclass2 extends Subclass {
+  constructor() {
+    super(5, 6, 7);
+  }
+}
+
+var ss2 = new Subclass2();
+assert.sameValue(ss2.foobar, 5, "The value of `ss2.foobar` is `5`");
+assert.sameValue(
+  Object.getPrototypeOf(ss2),
+  Subclass2.prototype,
+  "`Object.getPrototypeOf(ss2)` returns `Subclass2.prototype`"
+);
+
+class Subclass3 extends Base {
+  constructor(x, y) {
+    super(x + y);
+  }
+}
+
+var ss3 = new Subclass3(27,42-27);
+assert.sameValue(ss3.foobar, 42, "The value of `ss3.foobar` is `42`");
+assert.sameValue(
+  Object.getPrototypeOf(ss3),
+  Subclass3.prototype,
+  "`Object.getPrototypeOf(ss3)` returns `Subclass3.prototype`"
+);
diff --git a/test/language/class/definition/setters-2.js b/test/language/class/definition/setters-2.js
new file mode 100644
index 0000000000..5826b0d0c0
--- /dev/null
+++ b/test/language/class/definition/setters-2.js
@@ -0,0 +1,31 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class setters 2
+---*/
+var x = 0;
+class C {
+  set eval(v) {
+    x = v;
+  }
+  set arguments(v) {
+    x = v;
+  }
+  static set eval(v) {
+    x = v;
+  }
+  static set arguments(v) {
+    x = v;
+  }
+};
+
+new C().eval = 1;
+assert.sameValue(x, 1, "The value of `x` is `1`");
+new C().arguments = 2;
+assert.sameValue(x, 2, "The value of `x` is `2`");
+C.eval = 3;
+assert.sameValue(x, 3, "The value of `x` is `3`");
+C.arguments = 4;
+assert.sameValue(x, 4, "The value of `x` is `4`");
\ No newline at end of file
diff --git a/test/language/class/definition/setters.js b/test/language/class/definition/setters.js
new file mode 100644
index 0000000000..4e95cdddf6
--- /dev/null
+++ b/test/language/class/definition/setters.js
@@ -0,0 +1,37 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class setters
+---*/
+function assertSetterDescriptor(object, name) {
+  var descr = Object.getOwnPropertyDescriptor(object, name);
+  assert.sameValue(descr.configurable, true, "The value of `descr.configurable` is `true`");
+  assert.sameValue(descr.enumerable, false, "The value of `descr.enumerable` is `false`");
+  assert.sameValue(typeof descr.set, 'function', "`typeof descr.set` is `'function'`");
+  assert.sameValue('prototype' in descr.set, false, "The result of `'prototype' in descr.set` is `false`");
+  assert.sameValue(descr.get, undefined, "The value of `descr.get` is `undefined`");
+}
+
+var x, staticX, y, staticY;
+class C {
+  set x(v) { x = v; }
+  static set staticX(v) { staticX = v; }
+  set y(v) { y = v; }
+  static set staticY(v) { staticY = v; }
+}
+
+assertSetterDescriptor(C.prototype, 'x');
+assertSetterDescriptor(C.prototype, 'y');
+assertSetterDescriptor(C, 'staticX');
+assertSetterDescriptor(C, 'staticY');
+
+assert.sameValue(new C().x = 1, 1, "`new C().x = 1` is `1`");
+assert.sameValue(x, 1, "The value of `x` is `1`");
+assert.sameValue(C.staticX = 2, 2, "`C.staticX = 2` is `2`");
+assert.sameValue(staticX, 2, "The value of `staticX` is `2`");
+assert.sameValue(new C().y = 3, 3, "`new C().y = 3` is `3`");
+assert.sameValue(y, 3, "The value of `y` is `3`");
+assert.sameValue(C.staticY = 4, 4, "`C.staticY = 4` is `4`");
+assert.sameValue(staticY, 4, "The value of `staticY` is `4`");
diff --git a/test/language/class/definition/side-effects-in-extends.js b/test/language/class/definition/side-effects-in-extends.js
new file mode 100644
index 0000000000..6d9c14064d
--- /dev/null
+++ b/test/language/class/definition/side-effects-in-extends.js
@@ -0,0 +1,18 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class side effect in extends
+---*/
+var calls = 0;
+class C {}
+class D extends (calls++, C) {}
+assert.sameValue(calls, 1, "The value of `calls` is `1`");
+assert.sameValue(typeof D, 'function', "`typeof D` is `'function'`");
+assert.sameValue(Object.getPrototypeOf(D), C, "`Object.getPrototypeOf(D)` returns `C`");
+assert.sameValue(
+    C.prototype,
+    Object.getPrototypeOf(D.prototype),
+    "The value of `C.prototype` is `Object.getPrototypeOf(D.prototype)`"
+);
\ No newline at end of file
diff --git a/test/language/class/definition/side-effects-in-property-define.js b/test/language/class/definition/side-effects-in-property-define.js
new file mode 100644
index 0000000000..ea88e4515b
--- /dev/null
+++ b/test/language/class/definition/side-effects-in-property-define.js
@@ -0,0 +1,20 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class side effects in property define
+---*/
+function B() {}
+B.prototype = {
+  constructor: B,
+  set m(v) {
+    throw Error();
+  }
+};
+
+class C extends B {
+  m() { return 1; }
+}
+
+assert.sameValue(new C().m(), 1, "`new C().m()` returns `1`");
\ No newline at end of file
diff --git a/test/language/class/definition/this-access-restriction-2.js b/test/language/class/definition/this-access-restriction-2.js
new file mode 100644
index 0000000000..f67971868e
--- /dev/null
+++ b/test/language/class/definition/this-access-restriction-2.js
@@ -0,0 +1,88 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class this access restriction 2
+---*/
+class Base {
+  constructor(a, b) {
+    var o = new Object();
+    o.prp = a + b;
+    return o;
+  }
+}
+
+class Subclass extends Base {
+  constructor(a, b) {
+    var exn;
+    try {
+      this.prp1 = 3;
+    } catch (e) {
+      exn = e;
+    }
+    assert.sameValue(
+      exn instanceof ReferenceError,
+      true,
+      "The result of `exn instanceof ReferenceError` is `true`"
+    );
+    super(a, b);
+    assert.sameValue(this.prp, a + b, "The value of `this.prp` is `a + b`");
+    assert.sameValue(this.prp1, undefined, "The value of `this.prp1` is `undefined`");
+    assert.sameValue(
+      this.hasOwnProperty("prp1"),
+      false,
+      "`this.hasOwnProperty(\"prp1\")` returns `false`"
+    );
+    return this;
+  }
+}
+
+var b = new Base(1, 2);
+assert.sameValue(b.prp, 3, "The value of `b.prp` is `3`");
+
+
+var s = new Subclass(2, -1);
+assert.sameValue(s.prp, 1, "The value of `s.prp` is `1`");
+assert.sameValue(s.prp1, undefined, "The value of `s.prp1` is `undefined`");
+assert.sameValue(
+  s.hasOwnProperty("prp1"),
+  false,
+  "`s.hasOwnProperty(\"prp1\")` returns `false`"
+);
+
+class Subclass2 extends Base {
+  constructor(x) {
+    super(1,2);
+
+    if (x < 0) return;
+
+    var called = false;
+    function tmp() { called = true; return 3; }
+    var exn = null;
+    try {
+      super(tmp(),4);
+    } catch (e) { exn = e; }
+    assert.sameValue(
+      exn instanceof ReferenceError,
+      true,
+      "The result of `exn instanceof ReferenceError` is `true`"
+    );
+    assert.sameValue(called, true, "The value of `called` is `true`");
+  }
+}
+
+var s2 = new Subclass2(1);
+assert.sameValue(s2.prp, 3, "The value of `s2.prp` is `3`");
+
+var s3 = new Subclass2(-1);
+assert.sameValue(s3.prp, 3, "The value of `s3.prp` is `3`");
+
+assert.throws(TypeError, function() { Subclass.call(new Object(), 1, 2); });
+assert.throws(TypeError, function() { Base.call(new Object(), 1, 2); });
+
+class BadSubclass extends Base {
+  constructor() {}
+}
+
+assert.throws(ReferenceError, function() { new BadSubclass(); });
\ No newline at end of file
diff --git a/test/language/class/definition/this-access-restriction.js b/test/language/class/definition/this-access-restriction.js
new file mode 100644
index 0000000000..5433bdde0d
--- /dev/null
+++ b/test/language/class/definition/this-access-restriction.js
@@ -0,0 +1,98 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class this access restriction
+---*/
+class Base {}
+(function() {
+  class C extends Base {
+    constructor() {
+      var y;
+      super();
+    }
+  }; new C();
+}());
+assert.throws(ReferenceError, function() {
+  class C extends Base {
+    constructor() {
+      super(this.x);
+    }
+  }; new C();
+});
+assert.throws(ReferenceError, function() {
+  class C extends Base {
+    constructor() {
+      super(this);
+    }
+  }; new C();
+});
+assert.throws(ReferenceError, function() {
+  class C extends Base {
+    constructor() {
+      super.method();
+      super(this);
+    }
+  }; new C();
+});
+assert.throws(ReferenceError, function() {
+  class C extends Base {
+    constructor() {
+      super(super.method());
+    }
+  }; new C();
+});
+assert.throws(ReferenceError, function() {
+  class C extends Base {
+    constructor() {
+      super(super());
+    }
+  }; new C();
+});
+assert.throws(ReferenceError, function() {
+  class C extends Base {
+    constructor() {
+      super(1, 2, Object.getPrototypeOf(this));
+    }
+  }; new C();
+});
+(function() {
+  class C extends Base {
+    constructor() {
+      { super(1, 2); }
+    }
+  }; new C();
+}());
+(function() {
+  class C extends Base {
+    constructor() {
+      if (1) super();
+    }
+  }; new C();
+}());
+
+class C1 extends Object {
+  constructor() {
+    'use strict';
+    super();
+  }
+};
+new C1();
+
+class C2 extends Object {
+  constructor() {
+    ; 'use strict';;;;;
+    super();
+  }
+};
+new C2();
+
+class C3 extends Object {
+  constructor() {
+    ; 'use strict';;;;;
+    // This is a comment.
+    super();
+  }
+};
+new C3();
\ No newline at end of file
diff --git a/test/language/class/definition/this-check-ordering.js b/test/language/class/definition/this-check-ordering.js
new file mode 100644
index 0000000000..48bec406d3
--- /dev/null
+++ b/test/language/class/definition/this-check-ordering.js
@@ -0,0 +1,70 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class this check ordering
+---*/
+var baseCalled = 0;
+class Base {
+  constructor() { baseCalled++ }
+}
+
+var fCalled = 0;
+function f() { fCalled++; return 3; }
+
+class Subclass1 extends Base {
+  constructor() {
+    baseCalled = 0;
+    super();
+    assert.sameValue(baseCalled, 1, "The value of `baseCalled` is `1`");
+    var obj = this;
+
+    var exn = null;
+    baseCalled = 0;
+    fCalled = 0;
+    try {
+      super(f());
+    } catch (e) { exn = e; }
+    assert.sameValue(
+      exn instanceof ReferenceError,
+      true,
+      "The result of `exn instanceof ReferenceError` is `true`"
+    );
+    assert.sameValue(fCalled, 1, "The value of `fCalled` is `1`");
+    assert.sameValue(baseCalled, 1, "The value of `baseCalled` is `1`");
+    assert.sameValue(this, obj, "`this` is `obj`");
+
+    exn = null;
+    baseCalled = 0;
+    fCalled = 0;
+    try {
+      super(super(), f());
+    } catch (e) { exn = e; }
+    assert.sameValue(
+      exn instanceof ReferenceError,
+      true,
+      "The result of `exn instanceof ReferenceError` is `true`"
+    );
+    assert.sameValue(fCalled, 0, "The value of `fCalled` is `0`");
+    assert.sameValue(baseCalled, 1, "The value of `baseCalled` is `1`");
+    assert.sameValue(this, obj, "`this` is `obj`");
+
+    exn = null;
+    baseCalled = 0;
+    fCalled = 0;
+    try {
+      super(f(), super());
+    } catch (e) { exn = e; }
+    assert.sameValue(
+      exn instanceof ReferenceError,
+      true,
+      "The result of `exn instanceof ReferenceError` is `true`"
+    );
+    assert.sameValue(fCalled, 1, "The value of `fCalled` is `1`");
+    assert.sameValue(baseCalled, 1, "The value of `baseCalled` is `1`");
+    assert.sameValue(this, obj, "`this` is `obj`");
+  }
+}
+
+new Subclass1();
\ No newline at end of file
diff --git a/test/language/class/name-binding/basic.js b/test/language/class/name-binding/basic.js
new file mode 100644
index 0000000000..d5bbd5ace3
--- /dev/null
+++ b/test/language/class/name-binding/basic.js
@@ -0,0 +1,36 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class name binding
+---*/
+var C2;
+class C {
+  constructor() {
+    C2 = C;
+  }
+  m() {
+    C2 = C;
+  }
+  get x() {
+    C2 = C;
+  }
+  set x(_) {
+    C2 = C;
+  }
+}
+new C();
+assert.sameValue(C, C2, "The value of `C` is `C2`");
+
+C2 = undefined;
+new C().m();
+assert.sameValue(C, C2, "The value of `C` is `C2`");
+
+C2 = undefined;
+new C().x;
+assert.sameValue(C, C2, "The value of `C` is `C2`");
+
+C2 = undefined;
+new C().x = 1;
+assert.sameValue(C, C2, "The value of `C` is `C2`");
\ No newline at end of file
diff --git a/test/language/class/name-binding/const.js b/test/language/class/name-binding/const.js
new file mode 100644
index 0000000000..967234f992
--- /dev/null
+++ b/test/language/class/name-binding/const.js
@@ -0,0 +1,31 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class name binding const
+---*/
+assert.throws(TypeError, function() {
+  class C { constructor() { C = 42; } }; new C();
+});
+assert.throws(TypeError, function() {
+  new (class C { constructor() { C = 42; } })
+});
+assert.throws(TypeError, function() {
+  class C { m() { C = 42; } }; new C().m()
+});
+assert.throws(TypeError, function() {
+  new (class C { m() { C = 42; } }).m()
+});
+assert.throws(TypeError, function() {
+  class C { get x() { C = 42; } }; new C().x
+});
+assert.throws(TypeError, function() {
+  (new (class C { get x() { C = 42; } })).x
+});
+assert.throws(TypeError, function() {
+  class C { set x(_) { C = 42; } }; new C().x = 15;
+});
+assert.throws(TypeError, function() {
+  (new (class C { set x(_) { C = 42; } })).x = 15;
+});
diff --git a/test/language/class/name-binding/expression.js b/test/language/class/name-binding/expression.js
new file mode 100644
index 0000000000..3d10d2ee85
--- /dev/null
+++ b/test/language/class/name-binding/expression.js
@@ -0,0 +1,41 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class name binding expression
+---*/
+var Cc;
+var Cm;
+var Cgx;
+var Csx;
+var Cv = class C {
+  constructor() {
+    assert.sameValue(C, Cv, "The value of `C` is `Cv`, inside `constructor()`");
+    Cc = C;
+  }
+  m() {
+    assert.sameValue(C, Cv, "The value of `C` is `Cv`, inside `m()`");
+    Cm = C;
+  }
+  get x() {
+    assert.sameValue(C, Cv, "The value of `C` is `Cv`, inside `get x()`");
+    Cgx = C;
+  }
+  set x(_) {
+    assert.sameValue(C, Cv, "The value of `C` is `Cv`, inside `set x()`");
+    Csx = C;
+  }
+};
+
+new Cv();
+assert.sameValue(Cc, Cv, "The value of `Cc` is `Cv`, after executing `new Cv();`");
+
+new Cv().m();
+assert.sameValue(Cm, Cv, "The value of `Cm` is `Cv`, after executing `new Cv().m();`");
+
+new Cv().x;
+assert.sameValue(Cgx, Cv, "The value of `Cgx` is `Cv`, after executing `new Cv().x;`");
+
+new Cv().x = 1;
+assert.sameValue(Csx, Cv, "The value of `Csx` is `Cv`, after executing `new Cv().x = 1;`");
diff --git a/test/language/class/name-binding/in-extends-expression-assigned.js b/test/language/class/name-binding/in-extends-expression-assigned.js
new file mode 100644
index 0000000000..601091e189
--- /dev/null
+++ b/test/language/class/name-binding/in-extends-expression-assigned.js
@@ -0,0 +1,9 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class name binding in extends expression, assigned
+negative: ReferenceError
+---*/
+var x = (class x extends x {});
diff --git a/test/language/class/name-binding/in-extends-expression-grouped.js b/test/language/class/name-binding/in-extends-expression-grouped.js
new file mode 100644
index 0000000000..b0280bbdb0
--- /dev/null
+++ b/test/language/class/name-binding/in-extends-expression-grouped.js
@@ -0,0 +1,9 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class name binding in extends expression, grouped
+negative: ReferenceError
+---*/
+(class x extends x {});
diff --git a/test/language/class/name-binding/in-extends-expression.js b/test/language/class/name-binding/in-extends-expression.js
new file mode 100644
index 0000000000..c9ba5c7420
--- /dev/null
+++ b/test/language/class/name-binding/in-extends-expression.js
@@ -0,0 +1,9 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class name binding in extends expression
+negative: ReferenceError
+---*/
+class x extends x {}
diff --git a/test/language/class/strict-mode/arguments-caller.js b/test/language/class/strict-mode/arguments-caller.js
new file mode 100644
index 0000000000..320f016833
--- /dev/null
+++ b/test/language/class/strict-mode/arguments-caller.js
@@ -0,0 +1,16 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class strict mode
+---*/
+var D = class extends function() {
+  arguments.caller;
+} {};
+assert.throws(TypeError, function() {
+  Object.getPrototypeOf(D).arguments;
+});
+assert.throws(TypeError, function() {
+  new D;
+});
diff --git a/test/language/class/strict-mode/with.js b/test/language/class/strict-mode/with.js
new file mode 100644
index 0000000000..b4dfd60e40
--- /dev/null
+++ b/test/language/class/strict-mode/with.js
@@ -0,0 +1,11 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class strict mode: `with` disallowed
+negative: SyntaxError
+---*/
+
+class C extends (function B() { with ({}); return B; }()) {}
+
diff --git a/test/language/class/subclass/binding.js b/test/language/class/subclass/binding.js
new file mode 100644
index 0000000000..9240a5cce4
--- /dev/null
+++ b/test/language/class/subclass/binding.js
@@ -0,0 +1,52 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class subclass binding
+---*/
+class Base {
+  constructor(x, y) {
+    this.x = x;
+    this.y = y;
+  }
+}
+
+var obj = {};
+class Subclass extends Base {
+  constructor(x, y) {
+    super(x,y);
+    assert.sameValue(this !== obj, true, "The result of `this !== obj` is `true`");
+  }
+}
+
+var f = Subclass.bind(obj);
+assert.throws(TypeError, function () { f(1, 2); });
+var s = new f(1, 2);
+assert.sameValue(s.x, 1, "The value of `s.x` is `1`");
+assert.sameValue(s.y, 2, "The value of `s.y` is `2`");
+assert.sameValue(
+  Object.getPrototypeOf(s),
+  Subclass.prototype,
+  "`Object.getPrototypeOf(s)` returns `Subclass.prototype`"
+);
+
+var s1 = new f(1);
+assert.sameValue(s1.x, 1, "The value of `s1.x` is `1`");
+assert.sameValue(s1.y, undefined, "The value of `s1.y` is `undefined`");
+assert.sameValue(
+  Object.getPrototypeOf(s1),
+  Subclass.prototype,
+  "`Object.getPrototypeOf(s1)` returns `Subclass.prototype`"
+);
+
+var g = Subclass.bind(obj, 1);
+assert.throws(TypeError, function () { g(8); });
+var s2 = new g(8);
+assert.sameValue(s2.x, 1, "The value of `s2.x` is `1`");
+assert.sameValue(s2.y, 8, "The value of `s2.y` is `8`");
+assert.sameValue(
+  Object.getPrototypeOf(s),
+  Subclass.prototype,
+  "`Object.getPrototypeOf(s)` returns `Subclass.prototype`"
+);
\ No newline at end of file
diff --git a/test/language/class/subclass/builtins.js b/test/language/class/subclass/builtins.js
new file mode 100644
index 0000000000..bdaa32e048
--- /dev/null
+++ b/test/language/class/subclass/builtins.js
@@ -0,0 +1,30 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class sublclassing builtins
+---*/
+class ExtendedUint8Array extends Uint8Array {
+  constructor() {
+    super(10);
+    this[0] = 255;
+    this[1] = 0xFFA;
+  }
+}
+
+var eua = new ExtendedUint8Array();
+assert.sameValue(eua.length, 10, "The value of `eua.length` is `10`");
+assert.sameValue(eua.byteLength, 10, "The value of `eua.byteLength` is `10`");
+assert.sameValue(eua[0], 0xFF, "The value of `eua[0]` is `0xFF`");
+assert.sameValue(eua[1], 0xFA, "The value of `eua[1]` is `0xFA`");
+assert.sameValue(
+  Object.getPrototypeOf(eua),
+  ExtendedUint8Array.prototype,
+  "`Object.getPrototypeOf(eua)` returns `ExtendedUint8Array.prototype`"
+);
+assert.sameValue(
+  Object.prototype.toString.call(eua),
+  "[object Uint8Array]",
+  "`Object.prototype.toString.call(eua)` returns `\"[object Uint8Array]\"`"
+);
\ No newline at end of file
diff --git a/test/language/class/subclass/default-constructor-2.js b/test/language/class/subclass/default-constructor-2.js
new file mode 100644
index 0000000000..01be7d1283
--- /dev/null
+++ b/test/language/class/subclass/default-constructor-2.js
@@ -0,0 +1,63 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class default constructor 2
+---*/
+class Base1 { }
+assert.throws(TypeError, function() { Base1(); });
+
+class Subclass1 extends Base1 { }
+
+assert.throws(TypeError, function() { Subclass1(); });
+
+var s1 = new Subclass1();
+assert.sameValue(
+  Subclass1.prototype,
+  Object.getPrototypeOf(s1),
+  "The value of `Subclass1.prototype` is `Object.getPrototypeOf(s1)`, after executing `var s1 = new Subclass1();`"
+);
+
+class Base2 {
+  constructor(x, y) {
+    this.x = x;
+    this.y = y;
+  }
+}
+
+class Subclass2 extends Base2 {};
+
+var s2 = new Subclass2(1, 2);
+
+assert.sameValue(
+  Subclass2.prototype,
+  Object.getPrototypeOf(s2),
+  "The value of `Subclass2.prototype` is `Object.getPrototypeOf(s2)`, after executing `var s2 = new Subclass2(1, 2);`"
+);
+assert.sameValue(s2.x, 1, "The value of `s2.x` is `1`");
+assert.sameValue(s2.y, 2, "The value of `s2.y` is `2`");
+
+var f = Subclass2.bind({}, 3, 4);
+var s2prime = new f();
+assert.sameValue(
+  Subclass2.prototype,
+  Object.getPrototypeOf(s2prime),
+  "The value of `Subclass2.prototype` is `Object.getPrototypeOf(s2prime)`"
+);
+assert.sameValue(s2prime.x, 3, "The value of `s2prime.x` is `3`");
+assert.sameValue(s2prime.y, 4, "The value of `s2prime.y` is `4`");
+
+
+var obj = {};
+class Base3 {
+  constructor() {
+    return obj;
+  }
+}
+
+class Subclass3 extends Base3 {};
+
+var s3 = new Subclass3();
+assert.sameValue(s3, obj, "The value of `s3` is `obj`");
+
diff --git a/test/language/class/subclass/default-constructor.js b/test/language/class/subclass/default-constructor.js
new file mode 100644
index 0000000000..2e8e6b8f98
--- /dev/null
+++ b/test/language/class/subclass/default-constructor.js
@@ -0,0 +1,20 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class default constructor
+---*/
+var calls = 0;
+class Base {
+  constructor() {
+    calls++;
+  }
+}
+class Derived extends Base {}
+var object = new Derived;
+assert.sameValue(calls, 1, "The value of `calls` is `1`");
+
+calls = 0;
+assert.throws(TypeError, function() { Derived(); });
+assert.sameValue(calls, 0, "The value of `calls` is `0`");
\ No newline at end of file
diff --git a/test/language/class/subclass/null.js b/test/language/class/subclass/null.js
new file mode 100644
index 0000000000..4626840582
--- /dev/null
+++ b/test/language/class/subclass/null.js
@@ -0,0 +1,18 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class subclassing null
+---*/
+var N = null;
+
+class Foo extends N {
+  constructor(x, y) {
+    assert.sameValue(x, 1, "The value of `x` is `1`");
+    assert.sameValue(y, 2, "The value of `y` is `2`");
+    return {};
+  }
+}
+
+new Foo(1,2);
\ No newline at end of file
diff --git a/test/language/class/subclass/superclass-prototype-setter-constructor.js b/test/language/class/subclass/superclass-prototype-setter-constructor.js
new file mode 100644
index 0000000000..4c5a5bb4e7
--- /dev/null
+++ b/test/language/class/subclass/superclass-prototype-setter-constructor.js
@@ -0,0 +1,18 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    superclass setter "constructor" override
+---*/
+function Base() {}
+
+Base.prototype = {
+  set constructor(_) {
+    $ERROR("`Base.prototype.constructor` is unreachable.");
+  }
+};
+
+class C extends Base {}
+
+new C();
diff --git a/test/language/class/subclass/superclass-prototype-setter-method-override.js b/test/language/class/subclass/superclass-prototype-setter-method-override.js
new file mode 100644
index 0000000000..68943b0ea9
--- /dev/null
+++ b/test/language/class/subclass/superclass-prototype-setter-method-override.js
@@ -0,0 +1,22 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    superclass prototype override
+---*/
+function Base() {}
+
+Base.prototype = {
+  set m(_) {
+    $ERROR("`Base.prototype.m` is unreachable.");
+  }
+};
+
+class C extends Base {
+  m() {
+    return 1;
+  }
+}
+
+assert.sameValue(new C().m(), 1, "`new C().m()` returns `1`");
diff --git a/test/language/class/subclass/superclass-static-method-override.js b/test/language/class/subclass/superclass-static-method-override.js
new file mode 100644
index 0000000000..7b3a80480f
--- /dev/null
+++ b/test/language/class/subclass/superclass-static-method-override.js
@@ -0,0 +1,21 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    Static method override
+---*/
+function Base() {}
+Object.defineProperty(Base, 'staticM', {
+  set: function() {
+    $ERROR("`Base.staticM` is unreachable.");
+  }
+});
+
+class C extends Base {
+  static staticM() {
+    return 1;
+  }
+}
+
+assert.sameValue(C.staticM(), 1, "`C.staticM()` returns `1`");
diff --git a/test/language/class/super/in-constructor.js b/test/language/class/super/in-constructor.js
new file mode 100644
index 0000000000..ee9b9e8976
--- /dev/null
+++ b/test/language/class/super/in-constructor.js
@@ -0,0 +1,21 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class super in constructor
+---*/
+var calls = 0;
+class B {}
+B.prototype.x = 42;
+
+class C extends B {
+  constructor() {
+    super();
+    calls++;
+    assert.sameValue(super.x, 42, "The value of `super.x` is `42`");
+  }
+}
+
+new C;
+assert.sameValue(calls, 1, "The value of `calls` is `1`");
\ No newline at end of file
diff --git a/test/language/class/super/in-getter.js b/test/language/class/super/in-getter.js
new file mode 100644
index 0000000000..2f043c9814
--- /dev/null
+++ b/test/language/class/super/in-getter.js
@@ -0,0 +1,22 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class super in getter
+---*/
+class B {
+  method() {
+    return 1;
+  }
+  get x() {
+    return 2;
+  }
+}
+class C extends B {
+  get y() {
+    assert.sameValue(super.x, 2, "The value of `super.x` is `2`");
+    return super.method();
+  }
+}
+assert.sameValue(new C().y, 1, "The value of `new C().y` is `1`");
\ No newline at end of file
diff --git a/test/language/class/super/in-methods.js b/test/language/class/super/in-methods.js
new file mode 100644
index 0000000000..8d42d2cc21
--- /dev/null
+++ b/test/language/class/super/in-methods.js
@@ -0,0 +1,22 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class super in methods
+---*/
+class B {
+  method() {
+    return 1;
+  }
+  get x() {
+    return 2;
+  }
+}
+class C extends B {
+  method() {
+    assert.sameValue(super.x, 2, "The value of `super.x` is `2`");
+    return super.method();
+  }
+}
+assert.sameValue(new C().method(), 1, "`new C().method()` returns `1`");
\ No newline at end of file
diff --git a/test/language/class/super/in-setter.js b/test/language/class/super/in-setter.js
new file mode 100644
index 0000000000..12d3945538
--- /dev/null
+++ b/test/language/class/super/in-setter.js
@@ -0,0 +1,23 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class super in setter
+---*/
+class B {
+  method() {
+    return 1;
+  }
+  get x() {
+    return 2;
+  }
+}
+class C extends B {
+  set y(v) {
+    assert.sameValue(v, 3, "The value of `v` is `3`");
+    assert.sameValue(super.x, 2, "The value of `super.x` is `2`");
+    assert.sameValue(super.method(), 1, "`super.method()` returns `1`");
+  }
+}
+assert.sameValue(new C().y = 3, 3, "`new C().y = 3` is `3`");
\ No newline at end of file
diff --git a/test/language/class/super/in-static-getter.js b/test/language/class/super/in-static-getter.js
new file mode 100644
index 0000000000..13e6b08fb0
--- /dev/null
+++ b/test/language/class/super/in-static-getter.js
@@ -0,0 +1,22 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class super in static getter
+---*/
+class B {
+  static method() {
+    return 1;
+  }
+  static get x() {
+    return 2;
+  }
+}
+class C extends B {
+  static get x() {
+    assert.sameValue(super.x, 2, "The value of `super.x` is `2`");
+    return super.method();
+  }
+}
+assert.sameValue(C.x, 1, "The value of `C.x` is `1`");
\ No newline at end of file
diff --git a/test/language/class/super/in-static-methods.js b/test/language/class/super/in-static-methods.js
new file mode 100644
index 0000000000..23e143afe2
--- /dev/null
+++ b/test/language/class/super/in-static-methods.js
@@ -0,0 +1,22 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class super in static methods
+---*/
+class B {
+  static method() {
+    return 1;
+  }
+  static get x() {
+    return 2;
+  }
+}
+class C extends B {
+  static method() {
+    assert.sameValue(super.x, 2, "The value of `super.x` is `2`");
+    return super.method();
+  }
+}
+assert.sameValue(C.method(), 1, "`C.method()` returns `1`");
\ No newline at end of file
diff --git a/test/language/class/super/in-static-setter.js b/test/language/class/super/in-static-setter.js
new file mode 100644
index 0000000000..56de6df75f
--- /dev/null
+++ b/test/language/class/super/in-static-setter.js
@@ -0,0 +1,23 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.5
+description: >
+    class super in static setter
+---*/
+class B {
+  static method() {
+    return 1;
+  }
+  static get x() {
+    return 2;
+  }
+}
+class C extends B {
+  static set x(v) {
+    assert.sameValue(v, 3, "The value of `v` is `3`");
+    assert.sameValue(super.x, 2, "The value of `super.x` is `2`");
+    assert.sameValue(super.method(), 1, "`super.method()` returns `1`");
+  }
+}
+assert.sameValue(C.x = 3, 3, "`C.x = 3` is `3`");
\ No newline at end of file