diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch11/11.9/11.9.2/S11.9.2_A6.2_T1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch11/11.9/11.9.2/S11.9.2_A6.2_T1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,50 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If one expression is undefined or null and another is not, return false
+ *
+ * @path ch11/11.9/11.9.2/S11.9.2_A6.2_T1.js
+ * @description x is null or undefined, y is not
+ */
+
+//CHECK#1
+if ((undefined != true) !== true) {
+  $ERROR('#1: (undefined != true) === true');
+}
+
+//CHECK#2
+if ((undefined != 0) !== true) {
+  $ERROR('#2: (undefined != 0) === true');
+}
+
+//CHECK#3
+if ((undefined != "undefined") !== true) {
+  $ERROR('#3: (undefined != "undefined") === true');
+}
+
+//CHECK#4
+if ((undefined != {}) !== true) {
+  $ERROR('#4: (undefined != {}) === true');
+}
+
+//CHECK#5
+if ((null != false) !== true) {
+  $ERROR('#5: (null != false) === true');
+}
+
+//CHECK#6
+if ((null != 0) !== true) {
+  $ERROR('#6: (null != 0) === true');
+}
+
+//CHECK#7
+if ((null != "null") !== true) {
+  $ERROR('#7: (null != "null") === true');
+}
+
+//CHECK#8
+if ((null != {}) !== true) {
+  $ERROR('#8: (null != {}) === true');
+}
+