Description of problem:
________________ test_take_over_virtual_interface_and_rollback _________________

ip_link_dummy = None

    def test_take_over_virtual_interface_and_rollback(ip_link_dummy):
>       with dummy_interface(DUMMY_INTERFACE) as dummy_desired_state:

tests/integration/interface_common_test.py:90: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/usr/lib64/python3.6/contextlib.py:81: in __enter__
    return next(self.gen)
tests/integration/interface_common_test.py:59: in dummy_interface
    libnmstate.apply(dummy_desired_state)
/usr/lib/python3.6/site-packages/libnmstate/netapplier.py:66: in apply
    state.State(desired_state), verify_change, commit, rollback_timeout
/usr/lib/python3.6/site-packages/libnmstate/netapplier.py:148: in _apply_ifaces_state
    con_profiles=ifaces_add_configs + ifaces_edit_configs,
/usr/lib64/python3.6/contextlib.py:88: in __exit__
    next(self.gen)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

    @contextmanager
    def _setup_providers():
        mainloop = nmclient.mainloop()
        yield
        success = mainloop.run(timeout=MAINLOOP_TIMEOUT)
        if not success:
            nmclient.mainloop(refresh=True)
            raise NmstateLibnmError(
                "Unexpected failure of libnm when running the mainloop: {}".format(
>                   mainloop.error
                )
            )
E           libnmstate.error.NmstateLibnmError: Unexpected failure of libnm when running the mainloop: run timeout

/usr/lib/python3.6/site-packages/libnmstate/netapplier.py:215: NmstateLibnmError
------------------------------ Captured log setup ------------------------------
DEBUG    root:cmd.py:40 ip link add dummy_test type dummy (cwd None)
DEBUG    root:cmd.py:53 SUCCESS: <err> = b''; <rc> = 0
----------------------------- Captured stderr call -----------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/libnmstate/nm/connection.py", line 172, in _active_connection_callback
    nm_act_con = src_object.activate_connection_finish(result)
GLib.Error: nm-manager-error-quark: The device 'dummy_test' has no connections available for activation. (2)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/libnmstate/nm/connection.py", line 192, in _active_connection_callback
    elif self._is_ovs_plugin_missing(e):
  File "/usr/lib/python3.6/site-packages/libnmstate/nm/connection.py", line 246, in _is_ovs_plugin_missing
    self._con_profile.is_type(
AttributeError: 'NoneType' object has no attribute 'is_type'
------------------------------ Captured log call -------------------------------
DEBUG    root:checkpoint.py:117 Checkpoint /org/freedesktop/NetworkManager/Checkpoint/293 created for all devices: 60
DEBUG    root:netapplier.py:221 Adding new interfaces: []
DEBUG    root:netapplier.py:233 Editing interfaces: ['dummy_test']
DEBUG    root:connection.py:461 Connection settings for ConnectionSetting.create:
id: dummy_test
iface: dummy_test
uuid: 2b70ebed-04de-4c7c-b562-778f4f2ff280
type: dummy
autoconnect: True
autoconnect_slaves: <enum NM_SETTING_CONNECTION_AUTOCONNECT_SLAVES_YES of type NM.SettingConnectionAutoconnectSlaves>
DEBUG    root:nmclient.py:115 Executing NM action: func=add_connection_async
DEBUG    root:connection.py:337 Connection adding succeeded: dev=dummy_test
DEBUG    root:nmclient.py:115 Executing NM action: func=_safe_modify_async
DEBUG    root:device.py:143 Device reapply failed on dummy_test: error=nm-device-error-quark: Device is not activated (4)
Fallback to device activation
WARNING  root:nmclient.py:213 NM main-loop timed out.
DEBUG    root:checkpoint.py:139 Checkpoint /org/freedesktop/NetworkManager/Checkpoint/293 rollback executed: dbus.Dictionary({dbus.String('/org/freedesktop/NetworkManager/Devices/46'): dbus.UInt32(0), dbus.String('/org/freedesktop/NetworkManager/Devices/3'): dbus.UInt32(0), dbus.String('/org/freedesktop/NetworkManager/Devices/4'): dbus.UInt32(0), dbus.String('/org/freedesktop/NetworkManager/Devices/2'): dbus.UInt32(0), dbus.String('/org/freedesktop/NetworkManager/Devices/6'): dbus.UInt32(0), dbus.String('/org/freedesktop/NetworkManager/Devices/7'): dbus.UInt32(0), dbus.String('/org/freedesktop/NetworkManager/Devices/1'): dbus.UInt32(0), dbus.String('/org/freedesktop/NetworkManager/Devices/5'): dbus.UInt32(0)}, signature=dbus.Signature('su'))
---------------------------- Captured log teardown -----------------------------
DEBUG    root:cmd.py:40 ip link del dummy_test (cwd None)
DEBUG    root:cmd.py:53 SUCCESS: <err> = b''; <rc> = 0


Version-Release number of selected component (if applicable):
platform linux -- Python 3.6.8, pytest-5.3.4, py-1.8.1, pluggy-0.13.1 -- /usr/bin/python
cachedir: .pytest_cache
RPMs: NetworkManager-1.22.4-1.el8.x86_64
OS: Red Hat Enterprise Linux 8.2 Beta (Ootpa)

rootdir: /mnt/tests/NetworkManager-ci/nmstate, inifile: tox.ini
collecting ... collected 192 items / 191 deselected / 1 selected

nmstate-0.2.1-0.20200127.851git22ea377.el8