Pytest 3.7.0 incompatible with some plugins

[ahmedhosnycs]

(I'm not sure if this is the correct place to add this issue, but I'm sure that this is because of pytest new release 3.7.0)

Today, My testing pipeline was failing. It only fails with flake8 plugins and maybe other plugins.
It happens when I run:

py.test  --flake8 --isort --cache-clear tests/ 

This is the error I got

platform linux -- Python 3.5.2, pytest-3.7.0, py-1.5.4, pluggy-0.7.1
Django settings: main.settings (from ini file)
rootdir: /builds/mic/api/src, inifile: tox.ini
plugins: mock-1.10.0, isort-0.2.0, flake8-1.0.2, faker-2.0.0, factoryboy-2.0.1, env-0.6.2, django-3.3.3, cov-2.5.1, celery-4.1.1
collected 0 items / 1 errors

==================================== ERRORS ====================================
______________________________ ERROR collecting  _______________________________
.tox/quality/lib/python3.5/site-packages/_pytest/runner.py:201: in __init__
    self.result = func()
.tox/quality/lib/python3.5/site-packages/_pytest/runner.py:261: in <lambda>
    call = CallInfo(lambda: list(collector.collect()), "collect")
.tox/quality/lib/python3.5/site-packages/_pytest/main.py:475: in collect
    for x in self._collect(arg):
.tox/quality/lib/python3.5/site-packages/_pytest/main.py:519: in _collect
    for x in root._collectfile(pkginit):
E   AttributeError: 'Flake8Item' object has no attribute '_collectfile'

Part of my requirements

factory-boy==2.11.1,
Faker==0.8.17,
flake8==3.5.0,
ipython==6.5.0,
ipython-genutils==0.2.0,
isort==4.3.4,
Pillow==4.3.0,
pluggy==0.7.1,
prompt-toolkit==1.0.15,
ptyprocess==0.6.0,
py==1.5.4,
pyasn1==0.4.4,
pycodestyle==2.3.1,
pycparser==2.18,
pyflakes==1.6.0,
Pygments==2.2.0,
pyparsing==2.2.0,
pytest==3.7.0,
pytest-cache==1.0,
pytest-cov==2.5.1,
pytest-django==3.3.3,
pytest-env==0.6.2,
pytest-factoryboy==2.0.1,
pytest-faker==2.0.0,
pytest-flake8==1.0.2,
pytest-isort==0.2.0,
pytest-mock==1.10.0,
python-dateutil==2.7.0,
python-memcached==1.58,
pytz==2018.5,
raven==6.2.1,
requests==2.18.4,
s3transfer==0.1.13,
short-url==1.2.2,
simplegeneric==0.8.1,
six==1.11.0,
sqlparse==0.2.4,
text-unidecode==1.2,
tox==3.1.2,
traitlets==4.3.2,
unicodecsv==0.14.1,
urllib3==1.22,
vine==1.1.4,
virtualenv==16.0.0,
wcwidth==0.1.7,
xlrd==1.1.0,
XlsxWriter==1.0.2

How I solved it:
I pinned the version of pytest==3.6.4

If you think that this is not pytest related issue, feel free to close it.

Thanks

[RonnyPfannschmidt]

this is a duplicate of #3742 - the regression got introduced with the package scope

[pytestbot]

GitMate.io thinks possibly related issues are #1479 (pytest silently stops importing plugins on ImportError), #1965 (Pytest 3.0.2 memory leak with pytest.raises), #2959 (pytest 3.3.0 immutable fixture params), #1882 (pytest 3.0 on Anaconda), and #3203 (pytest shows 0% test statistics after 3.4.0 with --capture argument).