+ /usr/bin/python3 -m pytest
============================= test session starts ==============================
platform linux -- Python 3.8.0a3, pytest-4.3.0, py-1.7.0, pluggy-0.9.0
rootdir: /builddir/build/BUILD/html5lib-1.0.1, inifile: pytest.ini
plugins: expect-1.1.0
collected 31265 items / 1 errors / 31264 selected

==================================== ERRORS ====================================
________________ ERROR collecting html5lib/tests/test_stream.py ________________
/usr/lib/python3.8/site-packages/pluggy/hooks.py:289: in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
/usr/lib/python3.8/site-packages/pluggy/manager.py:68: in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
/usr/lib/python3.8/site-packages/pluggy/manager.py:59: in <lambda>
    self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
/usr/lib/python3.8/site-packages/_pytest/python.py:226: in pytest_pycollect_makeitem
    res = list(collector._genfunctions(name, obj))
/usr/lib/python3.8/site-packages/_pytest/python.py:403: in _genfunctions
    self.ihook.pytest_generate_tests(metafunc=metafunc)
/usr/lib/python3.8/site-packages/pluggy/hooks.py:289: in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
/usr/lib/python3.8/site-packages/pluggy/manager.py:68: in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
/usr/lib/python3.8/site-packages/pluggy/manager.py:59: in <lambda>
    self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
/usr/lib/python3.8/site-packages/_pytest/python.py:133: in pytest_generate_tests
    metafunc.parametrize(*marker.args, **marker.kwargs)
/usr/lib/python3.8/site-packages/_pytest/python.py:990: in parametrize
    argnames, parameters = ParameterSet._for_parametrize(
/usr/lib/python3.8/site-packages/_pytest/mark/structures.py:114: in _for_parametrize
    if len(param.values) != len(argnames):
E   TypeError: object of type 'MarkDecorator' has no len()
=============================== warnings summary ===============================
html5lib/tests/test_encoding.py:98
  html5lib/tests/test_encoding.py:98: PytestWarning: yield tests were removed in pytest 4.0 - test_encoding will be ignored
    def test_encoding():

html5lib/tests/test_sanitizer.py:62
  html5lib/tests/test_sanitizer.py:62: PytestWarning: yield tests were removed in pytest 4.0 - test_sanitizer will be ignored
    def test_sanitizer():

html5lib/tests/test_serializer.py:220
  html5lib/tests/test_serializer.py:220: PytestWarning: yield tests were removed in pytest 4.0 - test_serializer will be ignored
    def test_serializer():

html5lib/tests/test_treewalkers.py:81
  html5lib/tests/test_treewalkers.py:81: PytestWarning: yield tests were removed in pytest 4.0 - test_treewalker_six_mix will be ignored
    def test_treewalker_six_mix():

-- Docs: https://docs.pytest.org/en/latest/warnings.html
=========================== short test summary info ============================
FAILED html5lib/tests/test_stream.py
!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!
===================== 4 warnings, 1 error in 3.64 seconds ======================