diff --git a/neutron_lib/fixture.py b/neutron_lib/fixture.py
index 3e698ae92..2c224fc30 100644
--- a/neutron_lib/fixture.py
+++ b/neutron_lib/fixture.py
@@ -263,7 +263,7 @@ class RPCFixture(fixtures.Fixture):
             'oslo_messaging.Notifier', fake_notifier.FakeNotifier))
 
         self.messaging_conf = conffixture.ConfFixture(CONF)
-        self.messaging_conf.transport_driver = 'fake'
+        self.messaging_conf.transport_url = 'fake:/'
         # NOTE(russellb) We want all calls to return immediately.
         self.messaging_conf.response_timeout = 0
         self.useFixture(self.messaging_conf)