Captured stderr:
~~~~~~~~~~~~~~~~
    b'/home/vagrant/zuul/.tox/py36/lib/python3.6/site-packages/cherrypy/process/servers.py:416: UserWarning: Unable to verify that the server is bound on 41439'
    b'  warnings.warn(msg)'
    b''
{1} tests.unit.test_web.TestWeb.test_jobs_list [6.781049s] ... FAILED

Captured traceback:
~~~~~~~~~~~~~~~~~~~
    b'Traceback (most recent call last):'
    b'  File "/home/vagrant/zuul/tests/base.py", line 2905, in shutdown'
    b'    raise Exception("More than one thread is running: %s" % threads)'
    b'Exception: More than one thread is running: [<_MainThread(MainThread, started 140561891411776)>, <Thread(HTTPServer Thread-31, started 140560270530304)>]'
    b''