New failure in CI: https://github.com/python/cpython/runs/2669949777?check_suite_focus=true

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ERROR: test_msg_callback_deadlock_bpo43577 (test.test_ssl.TestSSLDebug)
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Traceback (most recent call last):
  File "/Users/runner/work/cpython/cpython/Lib/test/test_ssl.py", line 4813, in test_msg_callback_deadlock_bpo43577
    s.connect((HOST, server.port))
  File "/Users/runner/work/cpython/cpython/Lib/ssl.py", line 1372, in connect
    self._real_connect(addr, False)
  File "/Users/runner/work/cpython/cpython/Lib/ssl.py", line 1359, in _real_connect
    super().connect(addr)
ConnectionRefusedError: [Errno 61] Connection refused