$ nosetests
.Exception in thread Thread-2:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 552, in __bootstrap_inner
    self.run()
  File "/usr/local/lib/python2.7/dist-packages/watchdog-0.5.4-py2.7.egg/watchdog/observers/api.py", line 188, in run
    self.on_thread_exit()
  File "/usr/local/lib/python2.7/dist-packages/watchdog-0.5.4-py2.7.egg/watchdog/observers/inotify.py", line 726, in on_thread_exit
    self._inotify.close()
  File "/usr/local/lib/python2.7/dist-packages/watchdog-0.5.4-py2.7.egg/watchdog/observers/inotify.py", line 507, in close
    self._remove_all_watches()
  File "/usr/local/lib/python2.7/dist-packages/watchdog-0.5.4-py2.7.egg/watchdog/observers/inotify.py", line 640, in _remove_all_watches
    Inotify._raise_error()
  File "/usr/local/lib/python2.7/dist-packages/watchdog-0.5.4-py2.7.egg/watchdog/observers/inotify.py", line 664, in _raise_error
    raise OSError(os.strerror(_errnum))
OSError: Invalid argument


----------------------------------------------------------------------
Ran 1 test in 1.085s

OK