FAIL: test_change_stream_attrs (tornado_tests.test_motor_core.MotorCoreTest)
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Traceback (most recent call last):
  File "/Users/shane/git/motor/venv3.7/lib/python3.7/site-packages/tornado/testing.py", line 98, in __call__
    result = self.orig_method(*args, **kwargs)
  File "/Users/shane/git/motor/test/test_environment.py", line 261, in wrap
    return f(*args, **kwargs)
  File "/Users/shane/git/motor/test/test_environment.py", line 261, in wrap
    return f(*args, **kwargs)
  File "/Users/shane/git/motor/test/tornado_tests/test_motor_core.py", line 125, in test_change_stream_attrs
    attrs(self.cx.test.test.watch()) - motor_only)
AssertionError: Items in the first set but not the second:
'alive'
'try_next'
'resume_token'