diff --git a/static_src/shared/test/fakes.js b/static_src/shared/test/fakes.js
new file mode 100644
index 0000000..d506f6a
--- /dev/null
+++ b/static_src/shared/test/fakes.js
@@ -0,0 +1,12 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import sinon from 'sinon';
+
+export const clientLoggerFake = () => ({
+  logStart: sinon.stub(),
+  logEnd: sinon.stub(),
+  logPause: sinon.stub(),
+  started: sinon.stub().returns(true),
+});