diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch11/11.9/11.9.1/S11.9.1_A4.2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch11/11.9/11.9.1/S11.9.1_A4.2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If x is +0(-0) and y is -0(+0), return true
+ *
+ * @path ch11/11.9/11.9.1/S11.9.1_A4.2.js
+ * @description Checking all combinations
+ */
+
+//CHECK#1
+if ((+0 == -0) !== true) {
+  $ERROR('#1: (+0 == -0) === true');
+}
+
+//CHECK#2
+if ((-0 == +0) !== true) {
+  $ERROR('#2: (-0 == +0) === true');
+}
+