diff --git a/quic/quartc/test/quartc_peer_test.cc b/quic/quartc/test/quartc_peer_test.cc
index 513270e..4699129 100644
--- a/quic/quartc/test/quartc_peer_test.cc
+++ b/quic/quartc/test/quartc_peer_test.cc
@@ -34,6 +34,7 @@
                             QuicBandwidth::FromKBitsPerSecond(512),
                             QuicTime::Delta::FromMilliseconds(100)) {
     simulator_.set_random_generator(&rng_);
+    SetQuicReloadableFlag(quic_default_to_bbr, true);
   }
 
   void CreatePeers(const std::vector<QuartcDataSource::Config>& configs) {