diff --git a/docs/changelog.rst b/docs/changelog.rst
index 02138011..600b67eb 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -95,7 +95,7 @@ MPD frontend
 
 - Start ``songid`` counting at 1 instead of 0 to match the original MPD server.
 
-- Idle events are now emitted on ``seekeded`` events. This fix means that
+- Idle events are now emitted on ``seeked`` events. This fix means that
   clients relying on ``idle`` events now get notified about seeks.
   (Fixes: :issue:`1331` :issue:`1347`)
 
diff --git a/docs/conf.py b/docs/conf.py
index 5dcebc31..208822a2 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -15,7 +15,6 @@ sys.path.insert(0, os.path.abspath(os.path.dirname(__file__) + '/../'))
 
 
 class Mock(object):
-
     def __init__(self, *args, **kwargs):
         pass
 
@@ -27,39 +26,21 @@ class Mock(object):
 
     @classmethod
     def __getattr__(self, name):
-        if name in ('__file__', '__path__'):
-            return '/dev/null'
-        elif name == 'get_system_config_dirs':
-            # glib.get_system_config_dirs()
-            return tuple
-        elif name == 'get_user_config_dir':
-            # glib.get_user_config_dir()
+        if name == 'get_system_config_dirs':  # GLib.get_system_config_dirs()
+            return list
+        elif name == 'get_user_config_dir':  # GLib.get_user_config_dir()
             return str
-        elif (name[0] == name[0].upper() and
-                # gst.Caps
-                not name.startswith('Caps') and
-                # gst.PadTemplate
-                not name.startswith('PadTemplate') and
-                # dbus.String()
-                not name == 'String'):
-            return type(name, (), {})
         else:
             return Mock()
 
+
 MOCK_MODULES = [
     'dbus',
     'dbus.mainloop',
     'dbus.mainloop.glib',
     'dbus.service',
-    'glib',
-    'gobject',
-    'gst',
-    'gst.pbutils',
-    'pygst',
+    'mopidy.internal.gi',
     'pykka',
-    'pykka.actor',
-    'pykka.future',
-    'pykka.registry',
 ]
 for mod_name in MOCK_MODULES:
     sys.modules[mod_name] = Mock()
diff --git a/mopidy/commands.py b/mopidy/commands.py
index 9565ada8..76a6fd6e 100644
--- a/mopidy/commands.py
+++ b/mopidy/commands.py
@@ -7,14 +7,13 @@ import logging
 import os
 import sys
 
-from gi.repository import GLib, GObject
-
 import pykka
 
 from mopidy import config as config_lib, exceptions
 from mopidy.audio import Audio
 from mopidy.core import Core
 from mopidy.internal import deps, process, timer, versioning
+from mopidy.internal.gi import GLib, GObject
 
 logger = logging.getLogger(__name__)
 
diff --git a/mopidy/core/tracklist.py b/mopidy/core/tracklist.py
index ea60c408..1c5a24cc 100644
--- a/mopidy/core/tracklist.py
+++ b/mopidy/core/tracklist.py
@@ -627,7 +627,7 @@ class TracklistController(object):
 
     def _mark_played(self, tl_track):
         """Internal method for :class:`mopidy.core.PlaybackController`."""
-        if self.consume and tl_track is not None:
+        if self.get_consume() and tl_track is not None:
             self.remove({'tlid': [tl_track.tlid]})
             return True
         return False
diff --git a/mopidy/internal/gi.py b/mopidy/internal/gi.py
index 1407a657..7fa51f09 100644
--- a/mopidy/internal/gi.py
+++ b/mopidy/internal/gi.py
@@ -7,8 +7,7 @@ import textwrap
 try:
     import gi
     gi.require_version('Gst', '1.0')
-    gi.require_version('GstPbutils', '1.0')
-    from gi.repository import GLib, GObject, Gst, GstPbutils
+    from gi.repository import GLib, GObject, Gst
 except ImportError:
     print(textwrap.dedent("""
         ERROR: A GObject Python package was not found.
@@ -22,7 +21,9 @@ except ImportError:
     """))
     raise
 else:
-    Gst.is_initialized() or Gst.init()
+    Gst.init([])
+    gi.require_version('GstPbutils', '1.0')
+    from gi.repository import GstPbutils
 
 
 REQUIRED_GST_VERSION = (1, 2, 3)
diff --git a/mopidy/internal/network.py b/mopidy/internal/network.py
index c956d795..cefdf8ea 100644
--- a/mopidy/internal/network.py
+++ b/mopidy/internal/network.py
@@ -7,11 +7,10 @@ import socket
 import sys
 import threading
 
-from gi.repository import GObject
-
 import pykka
 
 from mopidy.internal import encoding
+from mopidy.internal.gi import GObject
 
 
 logger = logging.getLogger(__name__)
diff --git a/mopidy/internal/process.py b/mopidy/internal/process.py
index e826e43c..0710a82f 100644
--- a/mopidy/internal/process.py
+++ b/mopidy/internal/process.py
@@ -4,8 +4,7 @@ import logging
 import signal
 import threading
 
-from pykka import ActorDeadError
-from pykka.registry import ActorRegistry
+import pykka
 
 from mopidy.compat import thread
 
@@ -31,14 +30,14 @@ def exit_handler(signum, frame):
 
 
 def stop_actors_by_class(klass):
-    actors = ActorRegistry.get_by_class(klass)
+    actors = pykka.ActorRegistry.get_by_class(klass)
     logger.debug('Stopping %d instance(s) of %s', len(actors), klass.__name__)
     for actor in actors:
         actor.stop()
 
 
 def stop_remaining_actors():
-    num_actors = len(ActorRegistry.get_all())
+    num_actors = len(pykka.ActorRegistry.get_all())
     while num_actors:
         logger.error(
             'There are actor threads still running, this is probably a bug')
@@ -47,8 +46,8 @@ def stop_remaining_actors():
             num_actors, threading.active_count() - num_actors,
             ', '.join([t.name for t in threading.enumerate()]))
         logger.debug('Stopping %d actor(s)...', num_actors)
-        ActorRegistry.stop_all()
-        num_actors = len(ActorRegistry.get_all())
+        pykka.ActorRegistry.stop_all()
+        num_actors = len(pykka.ActorRegistry.get_all())
     logger.debug('All actors stopped.')
 
 
@@ -67,7 +66,7 @@ class BaseThread(threading.Thread):
             logger.info('Interrupted by user')
         except ImportError as e:
             logger.error(e)
-        except ActorDeadError as e:
+        except pykka.ActorDeadError as e:
             logger.warning(e)
         except Exception as e:
             logger.exception(e)
diff --git a/tests/core/test_playback.py b/tests/core/test_playback.py
index 03960b24..de6626ba 100644
--- a/tests/core/test_playback.py
+++ b/tests/core/test_playback.py
@@ -232,21 +232,6 @@ class TestPreviousHandling(BaseTest):
         self.assertIn(tl_tracks[1], self.core.tracklist.tl_tracks)
 
 
-class TestPlayUnknownHandling(BaseTest):
-
-    tracks = [Track(uri='unknown:a', length=1234),
-              Track(uri='dummy:b', length=1234)]
-
-    # TODO: move to UnplayableTest?
-    def test_play_skips_to_next_on_track_without_playback_backend(self):
-        self.core.playback.play()
-
-        self.replay_events()
-
-        current_track = self.core.playback.get_current_track()
-        self.assertEqual(current_track, self.tracks[1])
-
-
 class OnAboutToFinishTest(BaseTest):
 
     def test_on_about_to_finish_keeps_finished_track_in_tracklist(self):
@@ -622,14 +607,26 @@ class EventEmissionTest(BaseTest):
             listener_mock.send.mock_calls)
 
 
-class UnplayableURITest(BaseTest):
+class TestUnplayableURI(BaseTest):
+
+    tracks = [
+        Track(uri='unplayable://'),
+        Track(uri='dummy:b'),
+    ]
 
     def setUp(self):  # noqa: N802
-        super(UnplayableURITest, self).setUp()
-        self.core.tracklist.clear()
-        tl_tracks = self.core.tracklist.add([Track(uri='unplayable://')])
+        super(TestUnplayableURI, self).setUp()
+        tl_tracks = self.core.tracklist.get_tl_tracks()
         self.core.playback._set_current_tl_track(tl_tracks[0])
 
+    def test_play_skips_to_next_if_track_is_unplayable(self):
+        self.core.playback.play()
+
+        self.replay_events()
+
+        current_track = self.core.playback.get_current_track()
+        self.assertEqual(current_track, self.tracks[1])
+
     def test_pause_changes_state_even_if_track_is_unplayable(self):
         self.core.playback.pause()
         self.assertEqual(self.core.playback.state, core.PlaybackState.PAUSED)
@@ -769,7 +766,7 @@ class TestStream(BaseTest):
         self.assertEqual(self.playback.get_stream_title(), None)
 
 
-class BackendSelectionTest(unittest.TestCase):
+class TestBackendSelection(unittest.TestCase):
 
     def setUp(self):  # noqa: N802
         config = {
@@ -918,7 +915,7 @@ class BackendSelectionTest(unittest.TestCase):
         self.playback2.get_time_position.assert_called_once_with()
 
 
-class CorePlaybackWithOldBackendTest(unittest.TestCase):
+class TestCorePlaybackWithOldBackend(unittest.TestCase):
 
     def test_type_error_from_old_backend_does_not_crash_core(self):
         config = {
@@ -941,7 +938,7 @@ class CorePlaybackWithOldBackendTest(unittest.TestCase):
         b.playback.play.assert_called_once_with()
 
 
-class Bug1177RegressionTest(unittest.TestCase):
+class TestBug1177Regression(unittest.TestCase):
     def test(self):
         config = {
             'core': {
diff --git a/tests/internal/network/test_connection.py b/tests/internal/network/test_connection.py
index 291bbc46..9ee0aaf3 100644
--- a/tests/internal/network/test_connection.py
+++ b/tests/internal/network/test_connection.py
@@ -5,13 +5,12 @@ import logging
 import socket
 import unittest
 
-from gi.repository import GObject
-
 from mock import Mock, call, patch, sentinel
 
 import pykka
 
 from mopidy.internal import network
+from mopidy.internal.gi import GObject
 
 from tests import any_int, any_unicode
 
diff --git a/tests/internal/network/test_server.py b/tests/internal/network/test_server.py
index 1df25dbc..072e24de 100644
--- a/tests/internal/network/test_server.py
+++ b/tests/internal/network/test_server.py
@@ -4,11 +4,10 @@ import errno
 import socket
 import unittest
 
-from gi.repository import GObject
-
 from mock import Mock, patch, sentinel
 
 from mopidy.internal import network
+from mopidy.internal.gi import GObject
 
 from tests import any_int
 
diff --git a/tests/internal/test_path.py b/tests/internal/test_path.py
index 751e7c6e..9e09c39a 100644
--- a/tests/internal/test_path.py
+++ b/tests/internal/test_path.py
@@ -7,10 +7,9 @@ import shutil
 import tempfile
 import unittest
 
-from gi.repository import GLib
-
 from mopidy import compat, exceptions
 from mopidy.internal import path
+from mopidy.internal.gi import GLib
 
 import tests