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diff --git a/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.replace/subst-capture-idx-2.js b/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.replace/subst-capture-idx-2.js
new file mode 100644
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+++ b/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.replace/subst-capture-idx-2.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+    Substitution pattern: two-digit capturing group reference
+es6id: 21.2.5.8
+info: |
+    16. Repeat, for each result in results,
+        [...]
+        m. If functionalReplace is true, then
+           [...]
+        n. Else,
+           i. Let replacement be GetSubstitution(matched, S, position,
+              captures, replaceValue).
+        [...]
+
+    21.1.3.14.1 Runtime Semantics: GetSubstitution
+
+    Code units:
+    0x0024, N, N
+    Where 0x0030 ≤ N ≤ 0x0039
+
+    Unicode Characters:
+    $nn where
+    n is one of 0 1 2 3 4 5 6 7 8 9
+
+    Replacement text:
+    The nnth element of captures, where nn is a two-digit decimal number in the
+    range 01 to 99. If nn≤m and the nnth element of captures is undefined, use
+    the empty String instead. If nn is 00 or nn>m, no replacement is done.
+features: [Symbol.replace]
+---*/
+
+assert.sameValue(
+  /b(c)(z)?(.)/[Symbol.replace]('abcde', '[$01$02$03]'), 'a[cd]e'
+);
+
+assert.sameValue(
+  /b(c)(z)?(.)/[Symbol.replace]('abcde', '[$01$02$03$04$00]'), 'a[cd$04$00]e'
+);
+
+reportCompare(0, 0);