diff --git a/beets/mediafile.py b/beets/mediafile.py
index 234e0daba..9242ab1f1 100644
--- a/beets/mediafile.py
+++ b/beets/mediafile.py
@@ -1650,6 +1650,7 @@ class MediaFile(object):
         StorageStyle('ARRANGER'),
         ASFStorageStyle('beets/Arranger'),
     )
+
     grouping = MediaField(
         MP3StorageStyle('TIT1'),
         MP4StorageStyle('\xa9grp'),
diff --git a/test/test_mediafile.py b/test/test_mediafile.py
index f1066c56f..18dcc11a3 100644
--- a/test/test_mediafile.py
+++ b/test/test_mediafile.py
@@ -318,29 +318,29 @@ class ReadWriteTestBase(ArtTestMixin, GenreListTestMixin,
     """
 
     full_initial_tags = {
-        'title':         u'full',
-        'artist':        u'the artist',
-        'album':         u'the album',
-        'genre':         u'the genre',
-        'composer':      u'the composer',
-        'grouping':      u'the grouping',
-        'year':          2001,
-        'month':         None,
-        'day':           None,
-        'date':          datetime.date(2001, 1, 1),
-        'track':         2,
-        'tracktotal':    3,
-        'disc':          4,
-        'disctotal':     5,
-        'lyrics':        u'the lyrics',
-        'comments':      u'the comments',
-        'bpm':           6,
-        'comp':          True,
-        'mb_trackid':    '8b882575-08a5-4452-a7a7-cbb8a1531f9e',
-        'mb_albumid':    '9e873859-8aa4-4790-b985-5a953e8ef628',
-        'mb_artistid':   '7cf0ea9d-86b9-4dad-ba9e-2355a64899ea',
-        'art':           None,
-        'label':         u'the label',
+        'title':       u'full',
+        'artist':      u'the artist',
+        'album':       u'the album',
+        'genre':       u'the genre',
+        'composer':    u'the composer',
+        'grouping':    u'the grouping',
+        'year':        2001,
+        'month':       None,
+        'day':         None,
+        'date':        datetime.date(2001, 1, 1),
+        'track':       2,
+        'tracktotal':  3,
+        'disc':        4,
+        'disctotal':   5,
+        'lyrics':      u'the lyrics',
+        'comments':    u'the comments',
+        'bpm':         6,
+        'comp':        True,
+        'mb_trackid':  '8b882575-08a5-4452-a7a7-cbb8a1531f9e',
+        'mb_albumid':  '9e873859-8aa4-4790-b985-5a953e8ef628',
+        'mb_artistid': '7cf0ea9d-86b9-4dad-ba9e-2355a64899ea',
+        'art':         None,
+        'label':       u'the label',
     }
 
     tag_fields = [