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diff --git a/js/src/tests/test262/ch11/11.4/11.4.1/11.4.1-4.a-12.js b/js/src/tests/test262/ch11/11.4/11.4.1/11.4.1-4.a-12.js
new file mode 100644
index 000000000..5cc30983c
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.4/11.4.1/11.4.1-4.a-12.js
@@ -0,0 +1,23 @@
+/// Copyright (c) 2012 Ecma International.  All rights reserved. 
+/// Ecma International makes this code available under the terms and conditions set
+/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the 
+/// "Use Terms").   Any redistribution of this code must retain the above 
+/// copyright and this notice and otherwise comply with the Use Terms.
+/**
+ * This test is actually testing the [[Delete]] internal method (8.12.8). Since the
+ * language provides no way to directly exercise [[Delete]], the tests are placed here.
+ *
+ * @path ch11/11.4/11.4.1/11.4.1-4.a-12.js
+ * @description delete operator returns false when deleting a property(length)
+ */
+
+
+function testcase() {
+
+  var a = [1,2,3]
+  a.x = 10;
+  var d = delete a.length
+  if(d === false && a.length === 3)
+    return true;
+ }
+runTestCase(testcase);