diff --git a/synapse/appservice/scheduler.py b/synapse/appservice/scheduler.py
index 92b60c19b36d..31ae0c8f82eb 100644
--- a/synapse/appservice/scheduler.py
+++ b/synapse/appservice/scheduler.py
@@ -58,7 +58,7 @@
     List,
     Optional,
     Set,
-    Tuple
+    Tuple,
 )
 
 from synapse.appservice import (
@@ -160,7 +160,9 @@ class _ServiceQueuer:
     appservice at a given time.
     """
 
-    def __init__(self, txn_ctrl: "_TransactionController", clock: Clock, hs: "HomeServer"):
+    def __init__(
+        self, txn_ctrl: "_TransactionController", clock: Clock, hs: "HomeServer"
+    ):
         # dict of {service_id: [events]}
         self.queued_events: Dict[str, List[EventBase]] = {}
         # dict of {service_id: [events]}
diff --git a/synapse/storage/databases/main/end_to_end_keys.py b/synapse/storage/databases/main/end_to_end_keys.py
index a71c10f8c8b8..c70f390826e6 100644
--- a/synapse/storage/databases/main/end_to_end_keys.py
+++ b/synapse/storage/databases/main/end_to_end_keys.py
@@ -14,7 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import abc
-from typing import (TYPE_CHECKING, Collection,
+from typing import (
+    TYPE_CHECKING,
+    Collection,
     Dict,
     Iterable,
     List,