diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch11/11.9/11.9.1/S11.9.1_A4.3.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_A4.3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,36 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Type(x) and Type(y) are Number-s minus NaN, +0, -0.
+ * Return true, if x is the same number value as y; otherwise, return false
+ *
+ * @path ch11/11.9/11.9.1/S11.9.1_A4.3.js
+ * @description x and y are primitive numbers
+ */
+
+//CHECK#1
+if ((Number.POSITIVE_INFINITY == Number.POSITIVE_INFINITY) !== true) {
+  $ERROR('#1: (+Infinity == +Infinity) === true');
+}
+
+//CHECK#2
+if ((Number.NEGATIVE_INFINITY == Number.NEGATIVE_INFINITY) !== true) {
+  $ERROR('#2: (-Infinity == -Infinity) === true');
+}
+
+//CHECK#3
+if ((Number.POSITIVE_INFINITY == -Number.NEGATIVE_INFINITY) !== true) {
+  $ERROR('#3: (+Infinity == -(-Infinity)) === true');
+}
+
+//CHECK#4
+if ((1 == 0.999999999999) !== false) {
+  $ERROR('#4: (1 == 0.999999999999) === false');
+}
+
+//CHECK#5
+if ((1.0 == 1) !== true) {
+  $ERROR('#5: (1.0 == 1) === true');
+}
+