1 files changed, 1 insertions, 1 deletions
diff --git a/tests/handlers/test_presence.py b/tests/handlers/test_presence.py
index 638787b029..41c8c44e02 100644
--- a/tests/handlers/test_presence.py
+++ b/tests/handlers/test_presence.py
@@ -1858,7 +1858,7 @@ class PresenceJoinTestCase(unittest.HomeserverTestCase):
         )
 
         event = self.get_success(
-            builder.build(prev_event_ids=prev_event_ids, auth_event_ids=None)
+            builder.build(prev_event_ids=list(prev_event_ids), auth_event_ids=None)
         )
 
         self.get_success(self.federation_event_handler.on_receive_pdu(hostname, event))