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diff --git a/deps/v8/test/mjsunit/array-prototype-map.js b/deps/v8/test/mjsunit/array-prototype-map.js
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+++ b/deps/v8/test/mjsunit/array-prototype-map.js
@@ -0,0 +1,21 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/* Test behaviors when the prototype has elements */
+
+// map
+(function () {
+  var array = [,];
+
+  function map() {
+    return array.map(x => x + 1);
+  }
+
+  assertEquals(map(), [,]);
+
+  array.__proto__.push(5);
+  var narr = map();
+  assertNotEquals(Object.getOwnPropertyDescriptor(narr, 0), undefined);
+  assertEquals(narr[0], 6);
+})();