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ERROR: Failure: ImportError (cannot import name 'KnownFailureTest')
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Traceback (most recent call last):
  File "/Users/dana/anaconda3/envs/env1/lib/python3.5/site-packages/nose/failure.py", line 39, in runTest
    raise self.exc_val.with_traceback(self.tb)
  File "/Users/dana/anaconda3/envs/env1/lib/python3.5/site-packages/nose/loader.py", line 418, in loadTestsFromName
    addr.filename, addr.module)
  File "/Users/dana/anaconda3/envs/env1/lib/python3.5/site-packages/nose/importer.py", line 47, in importFromPath
    return self.importFromDir(dir_path, fqname)
  File "/Users/dana/anaconda3/envs/env1/lib/python3.5/site-packages/nose/importer.py", line 94, in importFromDir
    mod = load_module(part_fqname, fh, filename, desc)
  File "/Users/dana/anaconda3/envs/env1/lib/python3.5/imp.py", line 235, in load_module
    return load_source(name, filename, file)
  File "/Users/dana/anaconda3/envs/env1/lib/python3.5/imp.py", line 172, in load_source
    module = _load(spec)
  File "<frozen importlib._bootstrap>", line 693, in _load
  File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 697, in exec_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
  File "/Users/dana/Dana-Files/Codes/MARL/librosa/tests/test_display.py", line 29, in <module>
    from mpl_ic import image_comparison
  File "/Users/dana/Dana-Files/Codes/MARL/librosa/tests/mpl_ic.py", line 26, in <module>
    from matplotlib.testing.noseclasses import KnownFailureTest, \
ImportError: cannot import name 'KnownFailureTest'