diff --git a/synapse/api/auth.py b/synapse/api/auth.py
index 385f93763a..15407df14a 100644
--- a/synapse/api/auth.py
+++ b/synapse/api/auth.py
@@ -19,8 +19,7 @@ from twisted.internet import defer
 
 from synapse.api.constants import Membership
 from synapse.api.errors import AuthError, StoreError, Codes
-from synapse.api.events.room import (RoomTopicEvent, RoomMemberEvent,
-                                     MessageEvent, FeedbackEvent)
+from synapse.api.events.room import RoomMemberEvent
 
 import logging
 
diff --git a/synapse/api/streams/event.py b/synapse/api/streams/event.py
index a5c8b2b31f..fe44a488bc 100644
--- a/synapse/api/streams/event.py
+++ b/synapse/api/streams/event.py
@@ -19,9 +19,6 @@ from twisted.internet import defer
 
 from synapse.api.errors import EventStreamError
 from synapse.api.events import SynapseEvent
-from synapse.api.events.room import (
-    RoomMemberEvent, MessageEvent, FeedbackEvent, RoomTopicEvent
-)
 from synapse.api.streams import PaginationStream, StreamData
 
 import logging
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 16bac95331..2680678de7 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -175,7 +175,7 @@ class FederationHandler(BaseHandler):
 
         try:
             yield self.store.store_room(
-                event.room_id,
+                room_id,
                 "",
                 is_public=False
             )
diff --git a/synapse/handlers/presence.py b/synapse/handlers/presence.py
index 471dc86163..be10162db5 100644
--- a/synapse/handlers/presence.py
+++ b/synapse/handlers/presence.py
@@ -674,7 +674,7 @@ class PresenceHandler(BaseHandler):
 
     def push_update_to_clients(self, observer_user, observed_user,
                                statuscache):
-        state = statuscache.make_event(user=observed_user, clock=self.clock)
+        statuscache.make_event(user=observed_user, clock=self.clock)
 
         self.notifier.on_new_user_event(
             observer_user.to_string(),
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 5489de841f..c2b10f4189 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -20,8 +20,7 @@ from synapse.types import UserID, RoomAlias, RoomID
 from synapse.api.constants import Membership
 from synapse.api.errors import RoomError, StoreError, SynapseError
 from synapse.api.events.room import (
-    RoomTopicEvent, MessageEvent, InviteJoinEvent, RoomMemberEvent,
-    RoomConfigEvent
+    RoomTopicEvent, RoomMemberEvent, RoomConfigEvent
 )
 from synapse.api.streams.event import EventStream, EventsStreamData
 from synapse.handlers.presence import PresenceStreamData
@@ -29,7 +28,6 @@ from synapse.util import stringutils
 from ._base import BaseHandler
 
 import logging
-import json
 
 logger = logging.getLogger(__name__)
 
@@ -303,8 +301,6 @@ class MessageHandler(BaseHandler):
             except:
                 logger.exception("Failed to get snapshot")
 
-        user = self.hs.parse_userid(user_id)
-
         ret = {"rooms": rooms_ret, "presence": presence[0], "end": now_token}
 
         # logger.debug("snapshot_all_rooms returning: %s", ret)
diff --git a/synapse/rest/room.py b/synapse/rest/room.py
index 731317227d..6771da8fcd 100644
--- a/synapse/rest/room.py
+++ b/synapse/rest/room.py
@@ -249,7 +249,7 @@ class FeedbackRestServlet(RestServlet):
     @defer.inlineCallbacks
     def on_GET(self, request, room_id, msg_sender_id, msg_id, fb_sender_id,
                feedback_type):
-        user = yield (self.auth.get_user_by_req(request))
+        yield (self.auth.get_user_by_req(request))
 
         # TODO (erikj): Implement this?
         raise NotImplementedError("Getting feedback is not supported")
diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py
index d06033b980..a97a42e1e3 100644
--- a/synapse/storage/__init__.py
+++ b/synapse/storage/__init__.py
@@ -16,8 +16,9 @@
 from twisted.internet import defer
 
 from synapse.api.events.room import (
-    RoomMemberEvent, MessageEvent, RoomTopicEvent, FeedbackEvent,
-    RoomConfigEvent, RoomNameEvent,
+    RoomMemberEvent, RoomTopicEvent, FeedbackEvent,
+#   RoomConfigEvent,
+    RoomNameEvent,
 )
 
 from synapse.util.logutils import log_function
diff --git a/synapse/storage/feedback.py b/synapse/storage/feedback.py
index e60f98d1e1..cdc6670116 100644
--- a/synapse/storage/feedback.py
+++ b/synapse/storage/feedback.py
@@ -15,11 +15,7 @@
 
 from twisted.internet import defer
 
-from ._base import SQLBaseStore, Table
-from synapse.api.events.room import FeedbackEvent
-
-import collections
-import json
+from ._base import SQLBaseStore
 
 
 class FeedbackStore(SQLBaseStore):
diff --git a/synapse/storage/room.py b/synapse/storage/room.py
index 22f2dcca45..a5751005ef 100644
--- a/synapse/storage/room.py
+++ b/synapse/storage/room.py
@@ -18,12 +18,10 @@ from twisted.internet import defer
 from sqlite3 import IntegrityError
 
 from synapse.api.errors import StoreError
-from synapse.api.events.room import RoomTopicEvent
 
 from ._base import SQLBaseStore, Table
 
 import collections
-import json
 import logging
 
 logger = logging.getLogger(__name__)
diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py
index 86519b60c6..4ad37af0f3 100644
--- a/synapse/storage/roommember.py
+++ b/synapse/storage/roommember.py
@@ -15,15 +15,10 @@
 
 from twisted.internet import defer
 
-from synapse.types import UserID
+from ._base import SQLBaseStore
+
 from synapse.api.constants import Membership
-from synapse.api.events.room import RoomMemberEvent
 
-from ._base import SQLBaseStore, Table
-
-
-import collections
-import json
 import logging
 
 logger = logging.getLogger(__name__)
diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py
index 3a17a723fe..cae80563b4 100644
--- a/synapse/storage/stream.py
+++ b/synapse/storage/stream.py
@@ -37,10 +37,8 @@ from twisted.internet import defer
 
 from ._base import SQLBaseStore
 from synapse.api.errors import SynapseError
-from synapse.api.constants import Membership
 from synapse.util.logutils import log_function
 
-import json
 import logging