diff --git a/mock_modem_simple_proxy.h b/mock_modem_simple_proxy.h
new file mode 100644
index 0000000..f0ba0a2
--- /dev/null
+++ b/mock_modem_simple_proxy.h
@@ -0,0 +1,21 @@
+// Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SHILL_MOCK_MODEM_SIMPLE_PROXY_H_
+#define SHILL_MOCK_MODEM_SIMPLE_PROXY_H_
+
+#include <gmock/gmock.h>
+
+#include "shill/modem_simple_proxy_interface.h"
+
+namespace shill {
+
+class MockModemSimpleProxy : public ModemSimpleProxyInterface {
+ public:
+  MOCK_METHOD0(GetStatus, DBusPropertiesMap());
+};
+
+}  // namespace shill
+
+#endif  // SHILL_MOCK_MODEM_SIMPLE_PROXY_H_