diff --git a/tests/backends/base/events.py b/tests/backends/base/events.py
index 2b6df347..1d31a721 100644
--- a/tests/backends/base/events.py
+++ b/tests/backends/base/events.py
@@ -10,7 +10,7 @@ from mopidy.backends import listener
 @mock.patch.object(listener.BackendListener, 'send')
 class BackendEventsTest(object):
     def setUp(self):
-        self.audio = mock.Mock(spec=audio.Audio)
+        self.audio = audio.DummyAudio.start().proxy()
         self.backend = self.backend_class.start(audio=self.audio).proxy()
         self.core = core.Core.start(backends=[self.backend]).proxy()
 
diff --git a/tests/backends/base/playback.py b/tests/backends/base/playback.py
index 155fa661..d7979018 100644
--- a/tests/backends/base/playback.py
+++ b/tests/backends/base/playback.py
@@ -4,6 +4,8 @@ import mock
 import random
 import time
 
+import pykka
+
 from mopidy import audio, core
 from mopidy.core import PlaybackState
 from mopidy.models import Track
@@ -18,7 +20,7 @@ class PlaybackControllerTest(object):
     tracks = []
 
     def setUp(self):
-        self.audio = mock.Mock(spec=audio.Audio)
+        self.audio = audio.DummyAudio.start().proxy()
         self.backend = self.backend_class.start(audio=self.audio).proxy()
         self.core = core.Core(backends=[self.backend])
         self.playback = self.core.playback
@@ -29,6 +31,9 @@ class PlaybackControllerTest(object):
         assert self.tracks[0].length >= 2000, \
             'First song needs to be at least 2000 miliseconds'
 
+    def tearDown(self):
+        pykka.ActorRegistry.stop_all()
+
     def test_initial_state_is_stopped(self):
         self.assertEqual(self.playback.state, PlaybackState.STOPPED)
 
diff --git a/tests/backends/base/playlists.py b/tests/backends/base/playlists.py
index c162e500..2184168f 100644
--- a/tests/backends/base/playlists.py
+++ b/tests/backends/base/playlists.py
@@ -4,7 +4,6 @@ import os
 import shutil
 import tempfile
 
-import mock
 import pykka
 
 from mopidy import audio, core, settings
@@ -19,7 +18,7 @@ class PlaylistsControllerTest(object):
         settings.LOCAL_TAG_CACHE_FILE = path_to_data_dir('library_tag_cache')
         settings.LOCAL_MUSIC_PATH = path_to_data_dir('')
 
-        self.audio = mock.Mock(spec=audio.Audio)
+        self.audio = audio.DummyAudio.start().proxy()
         self.backend = self.backend_class.start(audio=self.audio).proxy()
         self.core = core.Core(backends=[self.backend])
 
diff --git a/tests/backends/base/tracklist.py b/tests/backends/base/tracklist.py
index 39536edc..39fb020d 100644
--- a/tests/backends/base/tracklist.py
+++ b/tests/backends/base/tracklist.py
@@ -1,6 +1,5 @@
 from __future__ import unicode_literals
 
-import mock
 import random
 
 import pykka
@@ -16,7 +15,7 @@ class TracklistControllerTest(object):
     tracks = []
 
     def setUp(self):
-        self.audio = mock.Mock(spec=audio.Audio)
+        self.audio = audio.DummyAudio.start().proxy()
         self.backend = self.backend_class.start(audio=self.audio).proxy()
         self.core = core.Core(audio=self.audio, backends=[self.backend])
         self.controller = self.core.tracklist