tox cover job failing

http://logs.openstack.org/34/579834/1/check/openstack-tox-cover/0aedebf/job-output.txt.gz#_2018-07-03_10_37_12_295876

2018-07-03 10:37:12.295712 | ubuntu-xenial | cover start: runtests
2018-07-03 10:37:12.295770 | ubuntu-xenial | cover runtests: PYTHONHASHSEED='664124522'
2018-07-03 10:37:12.295876 | ubuntu-xenial | cover runtests: commands[0] | python setup.py test --coverage --coverage-package-name=networking_ovn --testr-args=
2018-07-03 10:37:12.295996 | ubuntu-xenial | setting PATH=/home/zuul/src/git.openstack.org/openstack/networking-ovn/.tox/cover/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
2018-07-03 10:37:12.296559 | ubuntu-xenial | /home/zuul/src/git.openstack.org/openstack/networking-ovn$ /home/zuul/src/git.openstack.org/openstack/networking-ovn/.tox/cover/bin/python setup.py test --coverage --coverage-package-name=networking_ovn --testr-args=
2018-07-03 10:37:12.920223 | ubuntu-xenial | usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
2018-07-03 10:37:12.920333 | ubuntu-xenial | or: setup.py --help [cmd1 cmd2 ...]
2018-07-03 10:37:12.920390 | ubuntu-xenial | or: setup.py --help-commands
2018-07-03 10:37:12.920427 | ubuntu-xenial | or: setup.py cmd --help
2018-07-03 10:37:12.920442 | ubuntu-xenial |
2018-07-03 10:37:12.920487 | ubuntu-xenial | error: option --coverage not recognized
2018-07-03 10:37:12.955354 | ubuntu-xenial | ERROR: InvocationError for command '/home/zuul/src/git.openstack.org/openstack/networking-ovn/.tox/cover/bin/python setup.py test --coverage --coverage-package-name=networking_ovn --testr-args=' (exited with code 1)
2018-07-03 10:37:12.955477 | ubuntu-xenial | cover finish: runtests after 0.66 seconds
2018-07-03 10:37:12.955563 | ubuntu-xenial | ___________________________________ summary ___________