diff --git a/mopidy/frontends/mpd/translator.py b/mopidy/frontends/mpd/translator.py
index fc1f031b..d470d8e3 100644
--- a/mopidy/frontends/mpd/translator.py
+++ b/mopidy/frontends/mpd/translator.py
@@ -6,7 +6,7 @@ from mopidy.utils.path import mtime as get_mtime
 from mopidy.frontends.mpd import protocol
 from mopidy.utils.path import path_to_uri, uri_to_path, split_path
 
-def track_to_mpd_format(track, position=None, cpid=None, key=False, mtime=False):
+def track_to_mpd_format(track, position=None, cpid=None):
     """
     Format track for output to MPD client.
 
@@ -41,10 +41,6 @@ def track_to_mpd_format(track, position=None, cpid=None, key=False, mtime=False)
     if position is not None and cpid is not None:
         result.append(('Pos', position))
         result.append(('Id', cpid))
-    if key and track.uri:
-        result.insert(0, ('key', os.path.basename(uri_to_path(track.uri))))
-    if mtime and track.uri:
-        result.append(('mtime', get_mtime(uri_to_path(track.uri))))
     return result
 
 MPD_KEY_ORDER = '''
diff --git a/tests/frontends/mpd/serializer_test.py b/tests/frontends/mpd/serializer_test.py
index db0dabf4..1336dabe 100644
--- a/tests/frontends/mpd/serializer_test.py
+++ b/tests/frontends/mpd/serializer_test.py
@@ -42,21 +42,6 @@ class TrackMpdFormatTest(unittest.TestCase):
         self.assert_(('Pos', 1) in result)
         self.assert_(('Id', 2) in result)
 
-    def test_track_to_mpd_format_with_key(self):
-        track = Track(uri='file:///dir/subdir/file.mp3')
-        result = translator.track_to_mpd_format(track, key=True)
-        self.assert_(('key', 'file.mp3') in result)
-
-    def test_track_to_mpd_format_with_key_not_uri_encoded(self):
-        track = Track(uri='file:///dir/subdir/file%20test.mp3')
-        result = translator.track_to_mpd_format(track, key=True)
-        self.assert_(('key', 'file test.mp3') in result)
-
-    def test_track_to_mpd_format_with_mtime(self):
-        uri = translator.path_to_uri(data_folder('blank.mp3'))
-        result = translator.track_to_mpd_format(Track(uri=uri), mtime=True)
-        self.assert_(('mtime', 1234567) in result)
-
     def test_track_to_mpd_format_for_nonempty_track(self):
         track = Track(
             uri=u'a uri',