diff --git a/tests/rest/admin/test_room.py b/tests/rest/admin/test_room.py
index cb7f60e1379..7f9da385756 100644
--- a/tests/rest/admin/test_room.py
+++ b/tests/rest/admin/test_room.py
@@ -2058,7 +2058,7 @@ def test_room_state_param_empty(self) -> None:
 
         channel = self.make_request(
             "GET",
-            f"/_synapse/admin/v1/rooms/{room_id}/state?type=''",
+            f"/_synapse/admin/v1/rooms/{room_id}/state?type=",
             access_token=self.admin_user_tok,
         )
         self.assertEqual(200, channel.code)