diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py
index 625a2fe27..6a0bd8d22 100644
--- a/synapse/federation/transport/server.py
+++ b/synapse/federation/transport/server.py
@@ -720,6 +720,7 @@ class FederationGroupsUsersServlet(BaseFederationServlet):
 
         defer.returnValue((200, new_content))
 
+
 class FederationGroupsInvitedUsersServlet(BaseFederationServlet):
     """Get the users that have been invited to a group
     """
@@ -737,6 +738,7 @@ class FederationGroupsInvitedUsersServlet(BaseFederationServlet):
 
         defer.returnValue((200, new_content))
 
+
 class FederationGroupsInviteServlet(BaseFederationServlet):
     """Ask a group server to invite someone to the group
     """
diff --git a/synapse/groups/groups_server.py b/synapse/groups/groups_server.py
index 31fc71187..a3a500b9d 100644
--- a/synapse/groups/groups_server.py
+++ b/synapse/groups/groups_server.py
@@ -454,7 +454,6 @@ class GroupsServerHandler(object):
             "total_user_count_estimate": len(invited_users),
         })
 
-
     @defer.inlineCallbacks
     def get_rooms_in_group(self, group_id, requester_user_id):
         """Get the rooms in group as seen by requester_user_id
diff --git a/synapse/rest/client/v2_alpha/groups.py b/synapse/rest/client/v2_alpha/groups.py
index 4532112cf..d11bccc1d 100644
--- a/synapse/rest/client/v2_alpha/groups.py
+++ b/synapse/rest/client/v2_alpha/groups.py
@@ -370,6 +370,7 @@ class GroupUsersServlet(RestServlet):
 
         defer.returnValue((200, result))
 
+
 class GroupInvitedUsersServlet(RestServlet):
     """Get users invited to a group
     """