________ ERROR at setup of TestOvsApiBase.test_execute_a_single_command ________

    @pytest.fixture(scope='session', autouse=True)

    def ovs_service():

        service = OvsService()

        with xfail_when_running_on_travis_with_centos():

>           service.setup()

network/integration/ovs/conftest.py:38: 

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <network.ovsnettestlib.OvsService object at 0x7fbdc2256a58>

    def setup(self):

        if not self.ovs_init_state_is_up:

            cmd.exec_sync([OVS_CTL, '--system-id=random', 'start'])

>       assert self.is_service_running()

E       AssertionError

This line looks wrong:

 with xfail_when_running_on_travis_with_centos()

The test fail on Fedora:

works on CentOS: