$ python3.8 -X dev setup.py test -s test.asyncio_tests.test_asyncio_cursor
/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/setuptools/depends.py:2: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import imp
setup.py:28: ResourceWarning: unclosed file <_io.TextIOWrapper name='README.rst' mode='r' encoding='UTF-8'>
  long_description = open("README.rst").read()
ResourceWarning: Enable tracemalloc to get the object allocation traceback
running test
...
running build_ext
/Users/shane/git/mongo-python-driver/pymongo/mongo_client.py:664: DeprecationWarning: Option 'ssl_ca_certs' is deprecated, use 'tlsCAFile' instead.
  keyword_opts = _handle_option_deprecations(keyword_opts)
/Users/shane/git/mongo-python-driver/pymongo/mongo_client.py:664: DeprecationWarning: Option 'ssl_ca_certs' is deprecated, use 'tlsCAFile' instead.
  keyword_opts = _handle_option_deprecations(keyword_opts)
test_aggregate_batch_size (test.asyncio_tests.test_asyncio_cursor.TestAsyncIOCursor) ... /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/asyncio/events.py:81: DeprecationWarning: The loop argument is deprecated since Python 3.8, and scheduled for removal in Python 3.10.
  self._context.run(self._callback, *self._args)
ok
...
test_count (test.asyncio_tests.test_asyncio_cursor.TestAsyncIOCursor) ... /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/asyncio/events.py:81: DeprecationWarning: The loop argument is deprecated since Python 3.8, and scheduled for removal in Python 3.10.
  self._context.run(self._callback, *self._args)
ok
...
test_exhaust (test.asyncio_tests.test_asyncio_cursor.TestAsyncIOCursor) ... /Users/shane/git/motor/test/asyncio_tests/test_asyncio_cursor.py:479: DeprecationWarning: The loop argument is deprecated since Python 3.8, and scheduled for removal in Python 3.10.
  await asyncio.sleep(0.1, loop=self.loop)
ok