diff --git a/quic/test_tools/quic_transport_test_tools.h b/quic/test_tools/quic_transport_test_tools.h
index bf2dc0e..c6a8b46 100644
--- a/quic/test_tools/quic_transport_test_tools.h
+++ b/quic/test_tools/quic_transport_test_tools.h
@@ -23,6 +23,13 @@
   MOCK_METHOD1(CheckOrigin, bool(url::Origin));
 };
 
+class MockStreamVisitor : public QuicTransportStream::Visitor {
+ public:
+  MOCK_METHOD0(OnCanRead, void());
+  MOCK_METHOD0(OnFinRead, void());
+  MOCK_METHOD0(OnCanWrite, void());
+};
+
 }  // namespace test
 }  // namespace quic