diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch11/11.13/11.13.2/S11.13.2_A3.1_T3.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch11/11.13/11.13.2/S11.13.2_A3.1_T3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x @= y uses PutValue(x, x @ y)
+ *
+ * @path ch11/11.13/11.13.2/S11.13.2_A3.1_T3.js
+ * @description Checking Expression and Variable statements for x %= y
+ */
+
+//CHECK#1
+var x = -1;
+x %= 2; 
+if (x !== -1) {
+  $ERROR('#1: var x = -1; x %= 2; x === -1. Actual: ' + (x));
+}
+
+//CHECK#2
+y = -1;
+y %= 2;
+if (y !== -1) {
+  $ERROR('#2: y = -1; y %= 2; y === -1. Actual: ' + (y));
+}
+