1 files changed, 17 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-8.js
new file mode 100644
index 0000000000..3bd7f04768
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-8.js
@@ -0,0 +1,17 @@
+// 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 applied to String object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof String;
+}
+
+var obj = new String("abc");
+
+assert(Array.prototype.reduce.call(obj, callbackfn, 1), 'Array.prototype.reduce.call(obj, callbackfn, 1) !== true');
+
+reportCompare(0, 0);