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diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-8.js
new file mode 100644
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+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-8.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialValue if 'length' is 0 and
+    initialValue is present (subclassed Array, length overridden with
+    [])
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+assert.sameValue(f.reduce(cb, 1), 1, 'f.reduce(cb,1)');
+
+reportCompare(0, 0);