diff --git a/http_fetcher_unittest.h b/http_fetcher_unittest.h
new file mode 100644
index 0000000..5d17903
--- /dev/null
+++ b/http_fetcher_unittest.h
@@ -0,0 +1,17 @@
+// Copyright (c) 2009 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.
+
+// Definition of unit testing constants, to be shared by different testing
+// related modules.
+
+#ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_HTTP_FETCHER_TEST_H__
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_HTTP_FETCHER_TEST_H__
+
+namespace {
+
+const int kServerPort = 8088;
+
+}  // namespace
+
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_HTTP_FETCHER_TEST_H__