While running test_ssl in verbose mode, I noticed the following exception:

    [...]
    test_protocol_sslv3 (test.test_ssl.ThreadedTests)
    Connecting to an SSLv3 server with various client options ... 
     SSLv3->SSLv3 CERT_NONE
     SSLv3->SSLv3 CERT_OPTIONAL
     SSLv3->SSLv3 CERT_REQUIRED
     {SSLv23->SSLv3} CERT_NONE
    Exception in thread Thread-54:
    Traceback (most recent call last):
      File "/home/nadeem/src/cpython/def/Lib/threading.py", line 730, in _bootstrap_inner
        self.run()
      File "/home/nadeem/src/cpython/def/Lib/test/test_ssl.py", line 926, in run
        if not self.wrap_conn():
      File "/home/nadeem/src/cpython/def/Lib/test/test_ssl.py", line 880, in wrap_conn
        self.sock, server_side=True)
      File "/home/nadeem/src/cpython/def/Lib/ssl.py", line 206, in wrap_socket
        _context=self)
      File "/home/nadeem/src/cpython/def/Lib/ssl.py", line 293, in __init__
        raise x
      File "/home/nadeem/src/cpython/def/Lib/ssl.py", line 289, in __init__
        self.do_handshake()
      File "/home/nadeem/src/cpython/def/Lib/ssl.py", line 489, in do_handshake
        self._sslobj.do_handshake()
    ConnectionResetError: [Errno 104] Connection reset by peer

     {TLSv1->SSLv3} CERT_NONE
     SSLv23->SSLv3 CERT_NONE
    ok
    [...]

Note that the exception is ignored and the test still passes.