diff --git a/mopidy/mpd/frontend.py b/mopidy/mpd/frontend.py
index 71aea66e..8ffa08ab 100644
--- a/mopidy/mpd/frontend.py
+++ b/mopidy/mpd/frontend.py
@@ -13,7 +13,6 @@ implement our own MPD server which is compatible with the numerous existing
 import datetime as dt
 import logging
 import re
-import sys
 
 from mopidy.mpd import MpdAckError, MpdNotImplemented
 from mopidy.utils import flatten
diff --git a/mopidy/mpd/server.py b/mopidy/mpd/server.py
index e9265ece..e6abb633 100644
--- a/mopidy/mpd/server.py
+++ b/mopidy/mpd/server.py
@@ -10,7 +10,6 @@ import socket
 import sys
 
 from mopidy import get_mpd_protocol_version, settings
-from mopidy.mpd import MpdAckError
 from mopidy.utils import indent, pickle_connection
 
 logger = logging.getLogger('mopidy.mpd.server')
diff --git a/tests/backends/__init__.py b/tests/backends/__init__.py
index cec58c73..d91467dd 100644
--- a/tests/backends/__init__.py
+++ b/tests/backends/__init__.py
@@ -1,5 +1,3 @@
-from mopidy.models import Track
-
 class BaseCurrentPlaylistControllerTest(object):
     uris = []
     backend_class = None
diff --git a/tests/mixers/denontest.py b/tests/mixers/denontest.py
index e57f0c82..d0fb9a46 100644
--- a/tests/mixers/denontest.py
+++ b/tests/mixers/denontest.py
@@ -1,5 +1,4 @@
 import unittest
-import os
 
 from mopidy.mixers.denon import DenonMixer
 
diff --git a/tests/mpd/frontendtest.py b/tests/mpd/frontendtest.py
index f2e7fc6c..56c8f830 100644
--- a/tests/mpd/frontendtest.py
+++ b/tests/mpd/frontendtest.py
@@ -4,7 +4,7 @@ import unittest
 from mopidy.backends.dummy import DummyBackend
 from mopidy.mixers.dummy import DummyMixer
 from mopidy.models import Track, Playlist
-from mopidy.mpd import frontend, MpdAckError
+from mopidy.mpd import frontend
 
 class RequestHandlerTest(unittest.TestCase):
     def setUp(self):