code: def test_create_connection_ssl_failed_certificate(self):
      self.loop.set_exception_handler(lambda loop, ctx: None)
  
      sslctx = test_utils.simple_server_sslcontext()
      client_sslctx = test_utils.simple_client_sslcontext(
          disable_verify=False
      )
  
      def server(sock):
          try:
              sock.start_tls(sslctx, server_side=True)
          except ssl.SSLError:
              pass
          except OSError:
              pass
          finally:
              sock.close()
  
      async def client(addr):
          reader, writer = await asyncio.open_connection(
              *addr,
              ssl=client_sslctx,
              server_hostname="",
              ssl_handshake_timeout=support.LOOPBACK_TIMEOUT,
          )
  
      with self.tcp_server(server, max_clients=1, backlog=1) as srv:
          with self.assertRaises(ssl.SSLCertVerificationError):
              self.loop.run_until_complete(client(srv.addr))
  
imports: import logging
  import socket
  import unittest
  import weakref
  from test import support
  from test.support import socket_helper
  from unittest import mock
  import asyncio
  from asyncio import log
  from asyncio import protocols
  from asyncio import sslproto
  from test.test_asyncio import utils
  from test.test_asyncio import functional
label_desc: Use image node_id 11 for calling the BaseStartTLS obj's underlying member method code with example usage: obj.test_create_connection_ssl_failed_certificate() without return types