1 files changed, 3 insertions, 3 deletions
diff --git a/synapse/storage/databases/main/lock.py b/synapse/storage/databases/main/lock.py
index 0794cc6d25..8277ad8c33 100644
--- a/synapse/storage/databases/main/lock.py
+++ b/synapse/storage/databases/main/lock.py
@@ -79,9 +79,9 @@ class LockStore(SQLBaseStore):
 
         # A map from `(lock_name, lock_key)` to lock that we think we
         # currently hold.
-        self._live_lock_tokens: WeakValueDictionary[
-            Tuple[str, str], Lock
-        ] = WeakValueDictionary()
+        self._live_lock_tokens: WeakValueDictionary[Tuple[str, str], Lock] = (
+            WeakValueDictionary()
+        )
 
         # A map from `(lock_name, lock_key, token)` to read/write lock that we
         # think we currently hold. For a given lock_name/lock_key, there can be