Oh, I missed the attached test.log file. So, it's CentOS 7.3.1611 and the full error message is:

== CPython 3.5.2 (default, Apr 29 2017, 16:07:16) [GCC 4.8.5 20150623 (Red Hat 4.8.5-11)]
==   Linux-3.10.0-514.16.1.el7.x86_64-x86_64-with-centos-7.3.1611-Core little-endian
==   hash algorithm: siphash24 64bit
==   /home/vagrant/Downloads/Python-3.5.2/build/test_python_16502
...
[1/1/1] test_ssl
test_ssl: testing with 'OpenSSL 1.0.1e-fips 11 Feb 2013' (1, 0, 1, 5, 15)
          under Linux ('CentOS Linux', '7.3.1611', 'Core')
          HAS_SNI = True
          OP_ALL = 0x800003f7
          OP_NO_TLSv1_1 = 0x10000000
...
test_read_write_data (test.test_ssl.NetworkedBIOTests) ... Needed 3 calls to complete do_handshake().
Needed 1 calls to complete write().
ERROR
...
======================================================================
ERROR: test_read_write_data (test.test_ssl.NetworkedBIOTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/vagrant/Downloads/Python-3.5.2/Lib/test/test_ssl.py", line 1785, in test_read_write_data
    buf = self.ssl_io_loop(sock, incoming, outgoing, sslobj.read, 1024)
  File "/home/vagrant/Downloads/Python-3.5.2/Lib/test/test_ssl.py", line 1724, in ssl_io_loop
    sock.sendall(buf)
BrokenPipeError: [Errno 32] Broken pipe

----------------------------------------------------------------------
Ran 117 tests in 39.538s

FAILED (errors=1, skipped=8)
/home/vagrant/Downloads/Python-3.5.2/Lib/unittest/case.py:628: ResourceWarning: unclosed <socket.socket fd=4, family=AddressFamily.AF_INET, type=2049, proto=0, laddr=('10.0.2.15', 53304)>
  outcome.errors.clear()
test test_ssl failed