$ ./python -m test test_asyncio --verbose(...)test_interrupt_call_soon (test.test_asyncio.test_runners.RunnerTests.test_interrupt_call_soon) ... Exception in callback interrupt_self() at /home/vstinner/python/main/Lib/test/test_asyncio/test_runners.py:18handle: <TimerHandle when=93104.58238161601 interrupt_self() at /home/vstinner/python/main/Lib/test/test_asyncio/test_runners.py:18>Traceback (most recent call last):  File "/home/vstinner/python/main/Lib/asyncio/events.py", line 80, in _run    self._context.run(self._callback, *self._args)    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/test/test_asyncio/test_runners.py", line 19, in interrupt_self    _thread.interrupt_main()    ^^^^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/asyncio/runners.py", line 145, in _on_sigint    self._loop.call_soon_threadsafe(lambda: None)    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/asyncio/base_events.py", line 809, in call_soon_threadsafe    self._write_to_self()    ^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/asyncio/base_events.py", line 511, in _write_to_self    raise NotImplementedError    ^^^^^^^^^^^^^^^^^^^^^^^^^NotImplementedErroroktest_interrupt_cancelled_task (test.test_asyncio.test_runners.RunnerTests.test_interrupt_cancelled_task) ... Task exception was never retrievedfuture: <Task finished name='Task-1657' coro=<RunnerTests.test_interrupt_cancelled_task.<locals>.subtask() done, defined at /home/vstinner/python/main/Lib/test/test_asyncio/test_runners.py:366> exception=NotImplementedError()>Traceback (most recent call last):  File "/home/vstinner/python/main/Lib/test/test_asyncio/test_runners.py", line 369, in subtask    interrupt_self()    ^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/test/test_asyncio/test_runners.py", line 19, in interrupt_self    _thread.interrupt_main()    ^^^^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/asyncio/runners.py", line 145, in _on_sigint    self._loop.call_soon_threadsafe(lambda: None)    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/asyncio/base_events.py", line 809, in call_soon_threadsafe    self._write_to_self()    ^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/asyncio/base_events.py", line 511, in _write_to_self    raise NotImplementedError    ^^^^^^^^^^^^^^^^^^^^^^^^^NotImplementedErroroktest_interrupt_wait (test.test_asyncio.test_runners.RunnerTests.test_interrupt_wait) ... Exception in callback interrupt_self() at /home/vstinner/python/main/Lib/test/test_asyncio/test_runners.py:18handle: <TimerHandle when=93104.694901935 interrupt_self() at /home/vstinner/python/main/Lib/test/test_asyncio/test_runners.py:18>Traceback (most recent call last):  File "/home/vstinner/python/main/Lib/asyncio/events.py", line 80, in _run    self._context.run(self._callback, *self._args)    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/test/test_asyncio/test_runners.py", line 19, in interrupt_self    _thread.interrupt_main()    ^^^^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/asyncio/runners.py", line 145, in _on_sigint    self._loop.call_soon_threadsafe(lambda: None)    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/asyncio/base_events.py", line 809, in call_soon_threadsafe    self._write_to_self()    ^^^^^^^^^^^^^^^^^^^^^  File "/home/vstinner/python/main/Lib/asyncio/base_events.py", line 511, in _write_to_self    raise NotImplementedError    ^^^^^^^^^^^^^^^^^^^^^^^^^NotImplementedErrorok(...)