[issue47076] test_asyncio: test_get_cancelled() fails randomly on x86-64 macOS 3.x

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

> Again a relative short timeouts and super slow test boxes.

The problem is more that a sleep is not a reliable synchronization primitive:
https://pythondev.readthedocs.io/unstable_tests.html#don-t-use-sleep-as-synchronization

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<https://bugs.python.org/issue47076>
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