Tests are failed when ran with -Werror.

$ ./python -Werror -m test -vuall test_asyncgen
...
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ERROR: test_async_gen_asyncio_01 (test.test_asyncgen.AsyncGenAsyncioTest)
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Traceback (most recent call last):
  File "/home/serhiy/py/cpython/Lib/test/test_asyncgen.py", line 404, in test_async_gen_asyncio_01
    res = self.loop.run_until_complete(self.to_list(gen()))
  File "/home/serhiy/py/cpython/Lib/asyncio/base_events.py", line 582, in run_until_complete
    return future.result()
  File "/home/serhiy/py/cpython/Lib/test/test_asyncgen.py", line 391, in to_list
    async for i in gen:
  File "/home/serhiy/py/cpython/Lib/test/test_asyncgen.py", line 398, in gen
    await asyncio.sleep(0.01, loop=self.loop)
  File "/home/serhiy/py/cpython/Lib/asyncio/tasks.py", line 598, in sleep
    warnings.warn("The loop argument is deprecated and scheduled for "
DeprecationWarning: The loop argument is deprecated and scheduled for removal in Python 3.10.

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...
(the full log is too long)

$ ./python -Werror -m test -vuall test_asyncio
...
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FAIL: test_sleep_cancel (test.test_asyncio.test_tasks.PyTask_PyFuture_SubclassTests)
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Traceback (most recent call last):
  File "/home/serhiy/py/cpython/Lib/test/test_asyncio/utils.py", line 510, in close_loop
    loop.close()
  File "/home/serhiy/py/cpython/Lib/test/test_asyncio/utils.py", line 362, in close
    self._gen.send(0)
  File "/home/serhiy/py/cpython/Lib/test/test_asyncio/test_tasks.py", line 1363, in gen
    self.assertAlmostEqual(10.0, when)
AssertionError: 10.0 != 0 within 7 places (10.0 difference)

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FAIL: test_run_coroutine_threadsafe_task_factory_exception (test.test_asyncio.test_tasks.RunCoroutineThreadsafeTests)
Test coroutine submission from a tread to an event loop
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Traceback (most recent call last):
  File "/home/serhiy/py/cpython/Lib/test/test_asyncio/test_tasks.py", line 3189, in test_run_coroutine_threadsafe_task_factory_exception
    self.assertEqual(len(callback.call_args_list), 1)
AssertionError: 2 != 1

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...
(the full log is too long)