diff --git a/quic/quartc/quartc_stream_test.cc b/quic/quartc/quartc_stream_test.cc
index b689e57..eb4d412 100644
--- a/quic/quartc/quartc_stream_test.cc
+++ b/quic/quartc/quartc_stream_test.cc
@@ -55,7 +55,8 @@
       : QuicSession(connection,
                     nullptr /*visitor*/,
                     config,
-                    CurrentSupportedVersions()),
+                    CurrentSupportedVersions(),
+                    /*num_expected_unidirectional_static_streams = */ 0),
         write_buffer_(write_buffer) {}
 
   ~MockQuicSession() override {}