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ERROR: test_validation_with_system_ca_certs (test_ssl.TestSSL)
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Traceback (most recent call last):
  File "/data/mci/0da74ecabedce25bd65f8f867922d4db/src/test/__init__.py", line 433, in wrap
    return f(*args, **kwargs)
  File "/data/mci/0da74ecabedce25bd65f8f867922d4db/src/test/__init__.py", line 433, in wrap
    return f(*args, **kwargs)
  File "/data/mci/0da74ecabedce25bd65f8f867922d4db/src/test/test_ssl.py", line 446, in test_validation_with_system_ca_certs
    **self.credentials))
  File "/data/mci/0da74ecabedce25bd65f8f867922d4db/src/test/utils.py", line 630, in connected
    client.admin.command('ismaster')  # Force connection.
  File "/data/mci/0da74ecabedce25bd65f8f867922d4db/src/pymongo/database.py", line 730, in command
    read_preference, session) as (sock_info, slave_ok):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/data/mci/0da74ecabedce25bd65f8f867922d4db/src/pymongo/mongo_client.py", line 1298, in _socket_for_reads
    server = self._select_server(read_preference, session)
  File "/data/mci/0da74ecabedce25bd65f8f867922d4db/src/pymongo/mongo_client.py", line 1253, in _select_server
    server = topology.select_server(server_selector)
  File "/data/mci/0da74ecabedce25bd65f8f867922d4db/src/pymongo/topology.py", line 235, in select_server
    address))
  File "/data/mci/0da74ecabedce25bd65f8f867922d4db/src/pymongo/topology.py", line 193, in select_servers
    selector, server_timeout, address)
  File "/data/mci/0da74ecabedce25bd65f8f867922d4db/src/pymongo/topology.py", line 209, in _select_servers_loop
    self._error_message(selector))
ServerSelectionTimeoutError: SSL handshake failed: server:27017: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:590)
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