diff --git a/test/test_youtube_lists.py b/test/test_youtube_lists.py
index 7055d5a7a9..bf0a9b34eb 100644
--- a/test/test_youtube_lists.py
+++ b/test/test_youtube_lists.py
@@ -35,56 +35,56 @@ class FakeDownloader(object):
 
 class TestYoutubeLists(unittest.TestCase):
     def test_youtube_playlist(self):
-        DL = FakeDownloader()
-        IE = YoutubePlaylistIE(DL)
-        IE.extract('https://www.youtube.com/playlist?list=PLwiyx1dc3P2JR9N8gQaQN_BCvlSlap7re')
-        self.assertEqual(map(lambda x: YoutubeIE()._extract_id(x[0]), DL.result),
+        dl = FakeDownloader()
+        ie = YoutubePlaylistIE(dl)
+        ie.extract('https://www.youtube.com/playlist?list=PLwiyx1dc3P2JR9N8gQaQN_BCvlSlap7re')
+        self.assertEqual(map(lambda x: YoutubeIE()._extract_id(x[0]), dl.result),
             [ 'bV9L5Ht9LgY', 'FXxLjLQi3Fg', 'tU3Bgo5qJZE' ])
 
         #661
-        DL = FakeDownloader()
-        IE = YoutubePlaylistIE(DL)
-        IE.extract('PLMCmkNmxw6Z9eduM7BZjSEh7HiU543Ig0')
-        self.assertTrue(len(DL.result) > 20)
+        dl = FakeDownloader()
+        ie = YoutubePlaylistIE(dl)
+        ie.extract('PLMCmkNmxw6Z9eduM7BZjSEh7HiU543Ig0')
+        self.assertTrue(len(dl.result) > 20)
 
         #673
-        DL = FakeDownloader()
-        IE = YoutubePlaylistIE(DL)
-        IE.extract('PLBB231211A4F62143')
-        self.assertTrue(len(DL.result) > 40)
+        dl = FakeDownloader()
+        ie = YoutubePlaylistIE(dl)
+        ie.extract('PLBB231211A4F62143')
+        self.assertTrue(len(dl.result) > 40)
 
     def test_youtube_playlist_long(self):
-        DL = FakeDownloader()
-        IE = YoutubePlaylistIE(DL)
-        IE.extract('https://www.youtube.com/playlist?list=UUBABnxM4Ar9ten8Mdjj1j0Q')
-        self.assertTrue(len(DL.result) >= 799)
+        dl = FakeDownloader()
+        ie = YoutubePlaylistIE(dl)
+        ie.extract('https://www.youtube.com/playlist?list=UUBABnxM4Ar9ten8Mdjj1j0Q')
+        self.assertTrue(len(dl.result) >= 799)
 
     def test_youtube_playlist_with_deleted(self):
         #651
-        DL = FakeDownloader()
-        IE = YoutubePlaylistIE(DL)
-        IE.extract('https://www.youtube.com/playlist?list=PLwP_SiAcdui0KVebT0mU9Apz359a4ubsC')
-        self.assertFalse('pElCt5oNDuI' in map(lambda x: YoutubeIE()._extract_id(x[0]), DL.result))
-        self.assertFalse('KdPEApIVdWM' in map(lambda x: YoutubeIE()._extract_id(x[0]), DL.result))
+        dl = FakeDownloader()
+        ie = YoutubePlaylistIE(dl)
+        ie.extract('https://www.youtube.com/playlist?list=PLwP_SiAcdui0KVebT0mU9Apz359a4ubsC')
+        self.assertFalse('pElCt5oNDuI' in map(lambda x: YoutubeIE()._extract_id(x[0]), dl.result))
+        self.assertFalse('KdPEApIVdWM' in map(lambda x: YoutubeIE()._extract_id(x[0]), dl.result))
 
     def test_youtube_course(self):
-        DL = FakeDownloader()
-        IE = YoutubePlaylistIE(DL)
+        dl = FakeDownloader()
+        ie = YoutubePlaylistIE(dl)
         # TODO find a > 100 (paginating?) videos course
-        IE.extract('https://www.youtube.com/course?list=ECUl4u3cNGP61MdtwGTqZA0MreSaDybji8')
-        self.assertEqual(YoutubeIE()._extract_id(DL.result[0][0]), 'j9WZyLZCBzs')
-        self.assertEqual(len(DL.result), 25)
-        self.assertEqual(YoutubeIE()._extract_id(DL.result[-1][0]), 'rYefUsYuEp0')
+        ie.extract('https://www.youtube.com/course?list=ECUl4u3cNGP61MdtwGTqZA0MreSaDybji8')
+        self.assertEqual(YoutubeIE()._extract_id(dl.result[0][0]), 'j9WZyLZCBzs')
+        self.assertEqual(len(dl.result), 25)
+        self.assertEqual(YoutubeIE()._extract_id(dl.result[-1][0]), 'rYefUsYuEp0')
 
     def test_youtube_channel(self):
         # I give up, please find a channel that does paginate and test this like test_youtube_playlist_long
         pass # TODO
 
     def test_youtube_user(self):
-        DL = FakeDownloader()
-        IE = YoutubeUserIE(DL)
-        IE.extract('https://www.youtube.com/user/TheLinuxFoundation')
-        self.assertTrue(len(DL.result) >= 320)
+        dl = FakeDownloader()
+        ie = YoutubeUserIE(dl)
+        ie.extract('https://www.youtube.com/user/TheLinuxFoundation')
+        self.assertTrue(len(dl.result) >= 320)
 
 if __name__ == '__main__':
     unittest.main()