diff --git a/trunk/src/utest/srs_utest_app.cpp b/trunk/src/utest/srs_utest_app.cpp
index 28f9fcd2f..f3b8e759a 100644
--- a/trunk/src/utest/srs_utest_app.cpp
+++ b/trunk/src/utest/srs_utest_app.cpp
@@ -377,3 +377,9 @@ VOID TEST(AppFragmentTest, CheckDuration)
 	}
 }
 
+#define MOCK_LISTEN_PORT 11935
+
+VOID TEST(TCPServerTest, PingPong)
+{
+}
+