old_contents: import unittest
  
  from mopidy.backends.gstreamer import GStreamerBackend
  
  from tests.backends import (BasePlaybackControllerTest,
                              BaseCurrentPlaylistControllerTest)
  
  class GStreamerCurrentPlaylistHandlerTest(BaseCurrentPlaylistControllerTest, unittest.TestCase):
      uri = ['file://data/song1.mp3',
             'file://data/song2.mp3',
             'file://data/song3.mp3',
            ]
  
      backend_class = GStreamerBackend
  
  class GStreamerPlaybackControllerTest(BasePlaybackControllerTest, unittest.TestCase):
      backend_class = GStreamerBackend
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import unittest
  
  from mopidy.backends.gstreamer import GStreamerBackend
  
  from tests.backends import (BasePlaybackControllerTest,
                              BaseCurrentPlaylistControllerTest)
  
  class GStreamerCurrentPlaylistHandlerTest(BaseCurrentPlaylistControllerTest, unittest.TestCase):
      uris = ['file://data/song1.mp3',
             'file://data/song2.mp3',
             'file://data/song3.mp3',
            ]
  
      backend_class = GStreamerBackend
  
  class GStreamerPlaybackControllerTest(BasePlaybackControllerTest, unittest.TestCase):
      backend_class = GStreamerBackend
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Fix typo in GStreamer test