diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch11/11.13/11.13.2/S11.13.2_A1_T4.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch11/11.13/11.13.2/S11.13.2_A1_T4.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,71 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * White Space and Line Terminator between LeftHandSideExpression and "@=" or between "@=" and AssignmentExpression are allowed
+ *
+ * @path ch11/11.13/11.13.2/S11.13.2_A1_T4.js
+ * @description Checking by using eval, check operator is x += y
+ */
+
+//CHECK#1
+x = -1;
+if ((eval("x\u0009+=\u0009-1")) !== -2) {
+  $ERROR('#1: x = -1; (x\\u0009+=\\u0009-1) === -2');
+}
+
+//CHECK#2
+x = -1;
+if ((eval("x\u000B+=\u000B-1")) !== -2) {
+  $ERROR('#2: x = -1; (x\\u000B+=\\u000B-1) === -2');  
+}
+
+//CHECK#3
+x = -1;
+if ((eval("x\u000C+=\u000C-1")) !== -2) {
+  $ERROR('#3: x = -1; (x\\u000C+=\\u000C-1) === -2');
+}
+
+//CHECK#4
+x = -1;
+if ((eval("x\u0020+=\u0020-1")) !== -2) {
+  $ERROR('#4: x = -1; (x\\u0020+=\\u0020-1) === -2');
+}
+
+//CHECK#5
+x = -1;
+if ((eval("x\u00A0+=\u00A0-1")) !== -2) {
+  $ERROR('#5: x = -1; (x\\u00A0+=\\u00A0-1) === -2');
+}
+
+//CHECK#6
+x = -1;
+if ((eval("x\u000A+=\u000A-1")) !== -2) {
+  $ERROR('#6: x = -1; (x\\u000A+=\\u000A-1) === -2');  
+}
+
+//CHECK#7
+x = -1;
+if ((eval("x\u000D+=\u000D-1")) !== -2) {
+  $ERROR('#7: x = -1; (x\\u000D+=\\u000D-1) === -2');
+}
+
+//CHECK#8
+x = -1;
+if ((eval("x\u2028+=\u2028-1")) !== -2) {
+  $ERROR('#8: x = -1; (x\\u2028+=\\u2028-1) === -2');
+}
+
+//CHECK#9
+x = -1;
+if ((eval("x\u2029+=\u2029-1")) !== -2) {
+  $ERROR('#9: x = -1; (x\\u2029+=\\u2029-1) === -2');
+}
+
+
+//CHECK#10
+x = -1;
+if ((eval("x\u0009\u000B\u000C\u0020\u00A0\u000A\u000D\u2028\u2029+=\u0009\u000B\u000C\u0020\u00A0\u000A\u000D\u2028\u2029-1")) !== -2) {
+  $ERROR('#10: x = -1; (x\\u0009\\u000B\\u000C\\u0020\\u00A0\\u000A\\u000D\\u2028\\u2029+=\\u0009\\u000B\\u000C\\u0020\\u00A0\\u000A\\u000D\\u2028\\u2029-1) === -2');
+}
+