diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch11/11.9/11.9.4/S11.9.4_A8_T4.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch11/11.9/11.9.4/S11.9.4_A8_T4.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,80 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(x) is different from Type(y), return false
+ *
+ * @path ch11/11.9/11.9.4/S11.9.4_A8_T4.js
+ * @description x or y is null or undefined
+ */
+
+//CHECK#1
+if (undefined === null) {
+  $ERROR('#1: undefined !== null');
+}
+
+//CHECK#2
+if (null === undefined) {
+  $ERROR('#2: null !== undefined');
+}
+
+//CHECK#3
+if (null === 0) {
+  $ERROR('#3: null !== 0');
+}
+
+//CHECK#4
+if (0 === null) {
+  $ERROR('#4: 0 !== null');
+}
+
+//CHECK#5
+if (null === false) {
+  $ERROR('#5: null !== false');
+}
+
+//CHECK#6
+if (false === null) {
+  $ERROR('#6: false !== null');
+}
+
+//CHECK#7
+if (undefined === false) {
+  $ERROR('#7: undefined !== false');
+}
+
+//CHECK#8
+if (false === undefined) {
+  $ERROR('#8: false !== undefined');
+}
+
+//CHECK#9
+if (null === new Object()) {
+  $ERROR('#9: null !== new Object()');
+}
+
+//CHECK#10
+if (new Object() === null) {
+  $ERROR('#10: new Object() !== null');
+}
+
+//CHECK#11
+if (null === "null") {
+  $ERROR('#11: null !== "null"');
+}
+
+//CHECK#12
+if ("null" === null) {
+  $ERROR('#12: "null" !== null');
+}
+
+//CHECK#13
+if (undefined === "undefined") {
+  $ERROR('#13: undefined !== "undefined"');
+}
+
+//CHECK#14
+if ("undefined" === undefined) {
+  $ERROR('#14: "undefined" !== undefined');
+}
+