diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T8.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T8.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y produces the same result as x + (-y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A4_T8.js
+ * @description If the magnitude is too large to represent, the operation overflows and the result is then an infinity of appropriate sign
+ */
+
+//CHECK#1
+if (Number.MAX_VALUE - -Number.MAX_VALUE !== Number.POSITIVE_INFINITY) {
+  $ERROR('#1: Number.MAX_VALUE - -Number.MAX_VALUE === Number.POSITIVE_INFINITY. Actual: ' + (Number.MAX_VALUE - -Number.MAX_VALUE));
+}
+
+//CHECK#2
+if (-Number.MAX_VALUE - Number.MAX_VALUE !== Number.NEGATIVE_INFINITY) {
+  $ERROR('#2: -Number.MAX_VALUE - umber.MAX_VALUE === Number.NEGATIVE_INFINITY. Actual: ' + (-Number.MAX_VALUE - umber.MAX_VALUE));
+}
+
+//CHECK#3
+if (1e+308 - -1e+308 !== Number.POSITIVE_INFINITY) {
+  $ERROR('#3: 1e+308 - -1e+308 === Number.POSITIVE_INFINITY. Actual: ' + (1e+308 - -1e+308));
+}
+
+//CHECK#4
+if (-8.99e+307 - 8.99e+307 !== Number.NEGATIVE_INFINITY) {
+  $ERROR('#4: -8.99e+307 - 8.99e+307 === Number.NEGATIVE_INFINITY. Actual: ' + (-8.99e+307 - 8.99e+307));
+}
+