diff --git a/synapse/storage/group_server.py b/synapse/storage/group_server.py
index 16c11a056f..5fbe0ada4e 100644
--- a/synapse/storage/group_server.py
+++ b/synapse/storage/group_server.py
@@ -56,7 +56,8 @@ class GroupServerStore(SQLBaseStore):
                 "group_id": group_id,
             },
             retcols=(
-                "name", "short_description", "long_description", "avatar_url", "is_public", "is_joinable",
+                "name", "short_description", "long_description",
+                "avatar_url", "is_public", "is_joinable",
             ),
             allow_none=True,
             desc="get_group",