diff --git a/quic/test_tools/quic_test_utils.h b/quic/test_tools/quic_test_utils.h
index b29228f..7fe983f 100644
--- a/quic/test_tools/quic_test_utils.h
+++ b/quic/test_tools/quic_test_utils.h
@@ -859,6 +859,8 @@
   void OnOneRttPacketAcknowledged() override {}
   void OnHandshakePacketSent() override {}
   void OnHandshakeDoneReceived() override {}
+  void OnConnectionClosed(QuicErrorCode /*error*/,
+                          ConnectionCloseSource /*source*/) override {}
   HandshakeState GetHandshakeState() const override { return HANDSHAKE_START; }
   void SetServerApplicationStateForResumption(
       std::unique_ptr<ApplicationState> /*application_state*/) override {}