diff --git a/synapse/handlers/read_marker.py b/synapse/handlers/read_marker.py
index 021faff376..a97f6b9a79 100644
--- a/synapse/handlers/read_marker.py
+++ b/synapse/handlers/read_marker.py
@@ -17,14 +17,13 @@ from ._base import BaseHandler
 
 from twisted.internet import defer
 
-from synapse.util.logcontext import PreserveLoggingContext
 from synapse.util.async import Linearizer
-from synapse.types import get_domain_from_id
 from synapse.api.errors import SynapseError
 
 import logging
 logger = logging.getLogger(__name__)
 
+
 class ReadMarkerHandler(BaseHandler):
     def __init__(self, hs):
         super(ReadMarkerHandler, self).__init__(hs)
diff --git a/synapse/rest/client/v2_alpha/account_data.py b/synapse/rest/client/v2_alpha/account_data.py
index a846ab1dc1..56cd347e78 100644
--- a/synapse/rest/client/v2_alpha/account_data.py
+++ b/synapse/rest/client/v2_alpha/account_data.py
@@ -83,7 +83,8 @@ class RoomAccountDataServlet(RestServlet):
         body = parse_json_object_from_request(request)
 
         if account_data_type == "m.read_marker":
-            raise SynapseError(405,
+            raise SynapseError(
+                405,
                 "Cannot set m.read_marker through this API. "
                 "Use /rooms/!roomId:server.name/read_marker"
             )
diff --git a/synapse/rest/client/v2_alpha/read_marker.py b/synapse/rest/client/v2_alpha/read_marker.py
index 49ada9c047..a568a9252a 100644
--- a/synapse/rest/client/v2_alpha/read_marker.py
+++ b/synapse/rest/client/v2_alpha/read_marker.py
@@ -15,7 +15,6 @@
 
 from twisted.internet import defer
 
-from synapse.api.errors import SynapseError
 from synapse.http.servlet import RestServlet, parse_json_object_from_request
 from ._base import client_v2_patterns
 
@@ -45,7 +44,7 @@ class ReadMarkerRestServlet(RestServlet):
         body = parse_json_object_from_request(request)
 
         if "m.read" in body:
-            read_event_id = body["m.read"];
+            read_event_id = body["m.read"]
             yield self.receipts_handler.received_client_receipt(
                 room_id,
                 "m.read",