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diff --git a/deps/v8/test/intl/date-format/resolved-options-unwrap.js b/deps/v8/test/intl/date-format/resolved-options-unwrap.js
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+// 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 the Intl.DateTimeFormat.prototype.resolvedOptions will properly handle
+// 3. Let dtf be ? UnwrapDateTimeFormat(dtf).
+var x = Object.create(Intl.DateTimeFormat.prototype);
+x = Intl.DateTimeFormat.call(x, 'en');
+
+var resolvedOptions = Intl.DateTimeFormat.prototype.resolvedOptions.call(x);
+assertEquals(resolvedOptions.locale, 'en')