1 files changed, 4 insertions, 1 deletions
diff --git a/tests/rest/client/v1/test_rooms.py b/tests/rest/client/v1/test_rooms.py
index ed65f645fc..715414a310 100644
--- a/tests/rest/client/v1/test_rooms.py
+++ b/tests/rest/client/v1/test_rooms.py
@@ -19,6 +19,7 @@
 """Tests REST events for /rooms paths."""
 
 import json
+from typing import Iterable
 from urllib import parse as urlparse
 
 from mock import Mock
@@ -207,7 +208,9 @@ class RoomPermissionsTestCase(RoomBase):
         )
         self.assertEquals(403, channel.code, msg=channel.result["body"])
 
-    def _test_get_membership(self, room=None, members=[], expect_code=None):
+    def _test_get_membership(
+        self, room=None, members: Iterable = frozenset(), expect_code=None
+    ):
         for member in members:
             path = "/rooms/%s/state/m.room.member/%s" % (room, member)
             channel = self.make_request("GET", path)