OCSP test script (tools/ocsptest.py) does not work on Windows

$ pip list

Package          Version

---------------- -------------

attrs            19.3.0

certifi          2020.4.5.2

cffi             1.14.0

chardet          3.0.4

cryptography     2.9.2

idna             2.9

pip              20.1.1

pyasn1           0.4.8

pyasn1-modules   0.2.8

pycparser        2.20

pymongo          3.11.0b2.dev0

pyOpenSSL        19.1.0

requests         2.23.0

service-identity 18.1.0

setuptools       47.3.0

six              1.15.0

urllib3          1.25.9

wheel            0.34.2

(venv3.8)

$ python tools/ocsptest.py --host google.com

Traceback (most recent call last):

  File "tools/ocsptest.py", line 56, in <module>

    main()

  File "tools/ocsptest.py", line 53, in main

    check_ocsp(args.host, args.port, args.ca_file)

  File "tools/ocsptest.py", line 39, in check_ocsp

    s = ctx.wrap_socket(s, server_hostname=host)

  File "C:\cygwin\home\Administrator\venv3.8\lib\site-packages\pymongo\pyopenssl_context.py", line 295, in wrap_socket

    ssl_conn.do_handshake()

  File "C:\cygwin\home\Administrator\venv3.8\lib\site-packages\pymongo\pyopenssl_context.py", line 110, in do_handshake

    return self._call(super(_sslConn, self).do_handshake, *args, **kwargs)

  File "C:\cygwin\home\Administrator\venv3.8\lib\site-packages\pymongo\pyopenssl_context.py", line 101, in _call

    return call(*args, **kwargs)

  File "C:\cygwin\home\Administrator\venv3.8\lib\site-packages\OpenSSL\SSL.py", line 1934, in do_handshake

    self._raise_ssl_error(self._ssl, result)

  File "C:\cygwin\home\Administrator\venv3.8\lib\site-packages\OpenSSL\SSL.py", line 1671, in _raise_ssl_error

    _raise_current_error()

  File "C:\cygwin\home\Administrator\venv3.8\lib\site-packages\OpenSSL\_util.py", line 54, in exception_from_error_queue

    raise exception_type(errors)

OpenSSL.SSL.Error: [('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')]

(venv3.8)