diff --git a/tests/stream_muxer/conftest.py b/tests/stream_muxer/conftest.py
index b1d6c114..ee5ebb3b 100644
--- a/tests/stream_muxer/conftest.py
+++ b/tests/stream_muxer/conftest.py
@@ -10,8 +10,8 @@ async def mplex_conn_pair(is_host_secure):
     mplex_conn_0, swarm_0, mplex_conn_1, swarm_1 = await mplex_conn_pair_factory(
         is_host_secure
     )
-    assert mplex_conn_0.initiator
-    assert not mplex_conn_1.initiator
+    assert mplex_conn_0.is_initiator
+    assert not mplex_conn_1.is_initiator
     try:
         yield mplex_conn_0, mplex_conn_1
     finally: