diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch11/11.10/11.10.3/S11.10.3_A2.4_T3.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch11/11.10/11.10.3/S11.10.3_A2.4_T3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * First expression is evaluated first, and then second expression
+ *
+ * @path ch11/11.10/11.10.3/S11.10.3_A2.4_T3.js
+ * @description Checking with undeclarated variables
+ * @noStrict
+ */
+
+//CHECK#1
+try {
+  x | (x = 1);
+  $ERROR('#1.1: x | (x = 1) throw ReferenceError. Actual: ' + (x | (x = 1)));
+}
+catch (e) {
+  if ((e instanceof ReferenceError) !== true) {
+    $ERROR('#1.2: x | (x = 1) throw ReferenceError. Actual: ' + (e));
+  }
+}
+
+//CHECK#2
+if (((y = 1) | y) !== 1) {
+  $ERROR('#2: ((y = 1) | y) === 1. Actual: ' + (((y = 1) | y)));
+}
+