diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.4.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.4.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.
+
+/**
+ * If Type(Primitive(x)) is not String and Type(Primitive(y)) is not String, then operator x + y returns ToNumber(x) + ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.1_T2.4.js
+ * @description Type(Primitive(x)) is different from Type(Primitive(y)) and both types vary between Boolean (primitive or object) and Undefined
+ */
+
+//CHECK#1
+if (isNaN(true + undefined) !== true) {
+  $ERROR('#1: true + undefined === Not-a-Number. Actual: ' + (true + undefined));
+}
+
+//CHECK#2
+if (isNaN(undefined + true) !== true) {
+  $ERROR('#2: undefined + true === Not-a-Number. Actual: ' + (undefined + true));
+}
+
+//CHECK#3
+if (isNaN(new Boolean(true) + undefined) !== true) {
+  $ERROR('#3: new Boolean(true) + undefined === Not-a-Number. Actual: ' + (new Boolean(true) + undefined));
+}
+
+//CHECK#4
+if (isNaN(undefined + new Boolean(true)) !== true) {
+  $ERROR('#4: undefined + new Boolean(true) === Not-a-Number. Actual: ' + (undefined + new Boolean(true)));
+}
+