diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch11/11.3/11.3.2/S11.3.2_A3_T3.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch11/11.3/11.3.2/S11.3.2_A3_T3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x-- returns x = ToNumber(x) - 1
+ *
+ * @path ch11/11.3/11.3.2/S11.3.2_A3_T3.js
+ * @description Type(x) is string primitive or String object
+ */
+
+//CHECK#1
+var x = "1"; 
+x--; 
+if (x !== 1 - 1) {
+  $ERROR('#1: var x = "1"; x--; x === 1 - 1. Actual: ' + (x));
+}
+
+//CHECK#2
+var x = "x"; 
+x--; 
+if (isNaN(x) !== true) {
+  $ERROR('#2: var x = "x"; x--; x === Not-a-Number. Actual: ' + (x));
+}
+
+//CHECK#3
+var x = new Number("-1"); 
+x--;
+if (x !== -1 - 1) {
+  $ERROR('#3: var x = new String("-1"); x--; x === -1 - 1. Actual: ' + (x));
+}
+