AMD64 Windows7 SP1 3.7:
https://buildbot.python.org/all/#/builders/130/builds/935

0:23:27 load avg: 7.92 [412/416] test_plistlib passed -- running: test_venv (1 min 26 sec), test_concurrent_futures (23 min 26 sec)
0:23:32 load avg: 7.29 [413/416] test_argparse passed -- running: test_venv (1 min 31 sec), test_concurrent_futures (23 min 31 sec)
0:23:34 load avg: 7.29 [414/416] test_venv passed (1 min 32 sec) -- running: test_concurrent_futures (23 min 32 sec)
0:23:37 load avg: 6.71 [415/416] test_largefile passed -- running: test_concurrent_futures (23 min 35 sec)
running: test_concurrent_futures (24 min 6 sec)
running: test_concurrent_futures (24 min 36 sec)
...
running: test_concurrent_futures (25 hour 25 min)
running: test_concurrent_futures (25 hour 26 min)
running: test_concurrent_futures (25 hour 26 min)
running: test_concurrent_futures (25 hour 27 min)
running: test_concurrent_futures (25 hour 27 min)
running: test_concurrent_futures (25 hour 28 min)
program finished with exit code 1
elapsedTime=91968.468000