diff --git a/quic/core/quic_dispatcher_test.cc b/quic/core/quic_dispatcher_test.cc
index 305d359..9991695 100644
--- a/quic/core/quic_dispatcher_test.cc
+++ b/quic/core/quic_dispatcher_test.cc
@@ -517,6 +517,8 @@
 
 TEST_F(QuicDispatcherTest, StatelessVersionNegotiationWithClientConnectionId) {
   SetQuicRestartFlag(quic_do_not_override_connection_id, true);
+  SetQuicRestartFlag(quic_allow_variable_length_connection_id_for_negotiation,
+                     true);
   CreateTimeWaitListManager();
   QuicSocketAddress client_address(QuicIpAddress::Loopback4(), 1);