diff --git a/tests/utils.py b/tests/utils.py
index 9c8dc9dbc..03b5a05b2 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -331,6 +331,8 @@ def setup_test_homeserver(
                 cleanup_func(cleanup)
 
         hs.setup()
+        if homeserverToUse.__name__ == "TestHomeServer":
+            hs.setup_master()
     else:
         hs = homeserverToUse(
             name,