diff --git a/test/log_buffer_mock.hpp b/test/log_buffer_mock.hpp
new file mode 100644
index 0000000..f53fa87
--- /dev/null
+++ b/test/log_buffer_mock.hpp
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright (C) 2021 GOOGLE
+
+#pragma once
+
+#include "log_buffer.hpp"
+
+#include <gmock/gmock.h>
+
+class LogBufferMock : public LogBuffer
+{
+  public:
+    LogBufferMock() : LogBuffer(-1, -1)
+    {}
+    MOCK_METHOD(void, append, (const char* data, size_t sz), (override));
+    MOCK_METHOD(void, setFullHandler, (std::function<void()> cb), (override));
+    MOCK_METHOD(bool, empty, (), (const, override));
+    MOCK_METHOD(void, clear, (), (override));
+};