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diff --git a/test/mjsunit/instanceof.js b/test/mjsunit/instanceof.js
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+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+assertTrue({} instanceof Object);
+assertTrue([] instanceof Object);
+
+assertFalse({} instanceof Array);
+assertTrue([] instanceof Array);
+
+function TestChains() {
+  var A = {};
+  var B = {};
+  var C = {};
+  B.__proto__ = A;
+  C.__proto__ = B;
+
+  function F() { }
+  F.prototype = A;
+  assertTrue(C instanceof F);
+  assertTrue(B instanceof F);
+  assertFalse(A instanceof F);
+
+  F.prototype = B;
+  assertTrue(C instanceof F);
+  assertFalse(B instanceof F);
+  assertFalse(A instanceof F);
+
+  F.prototype = C;
+  assertFalse(C instanceof F);
+  assertFalse(B instanceof F);
+  assertFalse(A instanceof F);
+}
+
+TestChains();
+
+
+function TestExceptions() {
+  function F() { }
+  var items = [ 1, new Number(42), 
+                true, 
+                'string', new String('hest'),
+                {}, [], 
+                F, new F(),
+                Object, String ];
+
+  var exceptions = 0;
+  var instanceofs = 0;
+
+  for (var i = 0; i < items.length; i++) {
+    for (var j = 0; j < items.length; j++) {
+      try {
+        if (items[i] instanceof items[j]) instanceofs++;
+      } catch (e) {
+        assertTrue(e instanceof TypeError);
+        exceptions++;
+      }
+    }
+  }
+  assertEquals(10, instanceofs);
+  assertEquals(88, exceptions);
+
+  // Make sure to throw an exception if the function prototype
+  // isn't a proper JavaScript object.
+  function G() { }
+  G.prototype = undefined;
+  assertThrows("({} instanceof G)");
+}
+
+TestExceptions();