3.0 breaks connections using ansible

I’m trying out version 3.0.1 with --connection=ansible and it breaks on ansible_runner. The same command works fine with 2.1.0:

pytest -vvv --connection=ansible --ansible-inventory=hosts test_remote.py 
collected 0 items / 1 errors                                                  

=================================== ERRORS ====================================
_______________________ ERROR collecting test_remote.py _______________________
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/pluggy/hooks.py:289: in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/pluggy/manager.py:68: in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/pluggy/manager.py:62: in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/_pytest/python.py:238: in pytest_pycollect_makeitem
    res = list(collector._genfunctions(name, obj))
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/_pytest/python.py:414: in _genfunctions
    self.ihook.pytest_generate_tests(metafunc=metafunc)
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/pluggy/hooks.py:289: in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/pluggy/manager.py:68: in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/pluggy/manager.py:62: in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/testinfra/plugin.py:113: in pytest_generate_tests
    ansible_inventory=metafunc.config.option.ansible_inventory,
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/testinfra/host.py:143: in get_hosts
    for backend in testinfra.backend.get_backends(hosts, **kwargs):
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/testinfra/backend/__init__.py:91: in get_backends
    for name in klass.get_hosts(host, **kw):
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/testinfra/backend/ansible.py:59: in get_hosts
    return AnsibleRunner.get_runner(inventory).get_hosts(host)
../../../../.virtualenvs/ceph-volume/lib/python3.6/site-packages/testinfra/utils/ansible_runner.py:124: in get_hosts
    groupmatch = fnmatch.fnmatch(group, pattern)
../../../../.virtualenvs/ceph-volume/lib/python3.6/fnmatch.py:35: in fnmatch
    pat = os.path.normcase(pat)
../../../../.virtualenvs/ceph-volume/lib/python3.6/posixpath.py:54: in normcase
    s = os.fspath(s)
E   TypeError: expected str, bytes or os.PathLike object, not NoneType
!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!

With 2.1.0 is fine:

pytest -vvv --connection=ansible --ansible-inventory=hosts test_remote.py
============================= test session starts =============================
platform linux2 -- Python 2.7.16, pytest-4.4.1, py-1.8.0, pluggy-0.10.0 -- /tmp/27/bin/python2
cachedir: .pytest_cache
rootdir: /home/alfredo/python/
plugins: testinfra-2.1.0
collected 2 items                                                             

test_remote.py::test_release_file[ansible://node2] PASSED               [ 50%]
test_remote.py::test_release_file[ansible://node3] PASSED               [100%]

The test file:

def test_release_file(host):
    release_file = host.file("/etc/os-release")
    assert release_file.contains('CentOS')
    assert release_file.contains('VERSION="7 (Core)"')

And the hosts file:

[nginx]
node2
node3

[alfredodeza]

3.0.2 works! Thank you so much

[philpep]

I just released 3.0.2 with these fixes, tell me if it works for you.