diff --git a/synapse/replication/tcp/protocol.py b/synapse/replication/tcp/protocol.py
index 171a698e14..dec5ac0913 100644
--- a/synapse/replication/tcp/protocol.py
+++ b/synapse/replication/tcp/protocol.py
@@ -49,29 +49,37 @@ indicate which side is sending, these are *not* included on the wire::
* connection closed by server *
"""
+import fcntl
+import logging
+import struct
+from collections import defaultdict
+
+from six import iteritems, iterkeys
+
+from prometheus_client import Counter
+
from twisted.internet import defer
from twisted.protocols.basic import LineOnlyReceiver
from twisted.python.failure import Failure
-from .commands import (
- COMMAND_MAP, VALID_CLIENT_COMMANDS, VALID_SERVER_COMMANDS,
- ErrorCommand, ServerCommand, RdataCommand, PositionCommand, PingCommand,
- NameCommand, ReplicateCommand, UserSyncCommand, SyncCommand,
-)
-from .streams import STREAMS_MAP
-
from synapse.metrics import LaterGauge
from synapse.util.stringutils import random_string
-from prometheus_client import Counter
-
-from collections import defaultdict
-
-from six import iterkeys, iteritems
-
-import logging
-import struct
-import fcntl
+from .commands import (
+ COMMAND_MAP,
+ VALID_CLIENT_COMMANDS,
+ VALID_SERVER_COMMANDS,
+ ErrorCommand,
+ NameCommand,
+ PingCommand,
+ PositionCommand,
+ RdataCommand,
+ ReplicateCommand,
+ ServerCommand,
+ SyncCommand,
+ UserSyncCommand,
+)
+from .streams import STREAMS_MAP
connection_close_counter = Counter(
"synapse_replication_tcp_protocol_close_reason", "", ["reason_type"])
|