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diff --git a/js/src/tests/test262/built-ins/RegExp/S15.10.2.8_A1_T5.js b/js/src/tests/test262/built-ins/RegExp/S15.10.2.8_A1_T5.js
new file mode 100644
index 0000000000..4115251998
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/S15.10.2.8_A1_T5.js
@@ -0,0 +1,19 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The form (?= Disjunction ) specifies a zero-width positive lookahead.
+    In order for it to succeed, the pattern inside Disjunction must match at the current position, but the current position is not advanced before matching the sequel.
+    If Disjunction can match at the current position in several ways, only the first one is tried
+es5id: 15.10.2.8_A1_T5
+description: >
+    Execute /[Jj]ava([Ss]cript)?(?=\:)/.test("rhino is JavaScript
+    engine") and check results
+---*/
+
+var __executed = /[Jj]ava([Ss]cript)?(?=\:)/.test("rhino is JavaScript engine");
+
+assert(!__executed, 'The value of !__executed is expected to be true');
+
+reportCompare(0, 0);