base docker image: python:3.8.1-alpine3.11

amqp 2.5.2
apipkg 1.5
apns2 0.7.1
asgiref 3.2.5
attrs 19.3.0
autopep8 1.5
backcall 0.1.0
bandit 1.6.2
billiard 3.6.3.0
celery 4.4.1
certifi 2019.11.28
cffi 1.14.0
chardet 3.0.4
click 7.1.1
coreapi 2.3.3
coreschema 0.0.4
coverage 5.0.3
cryptography 2.8
decorator 4.4.2
Django 3.0.4
django-cors-headers 3.2.1
django-debug-toolbar 2.2
django-environ 0.4.5
django-extensions 2.2.8
django-filter 2.2.0
django-fsm 2.7.0
django-guardian 2.2.0
django-push-notifications 2.0.0
django-redis-cache 2.1.0
django-silk 4.0.1
django-solo 1.1.3
djangorestframework 3.11.0
djangorestframework-simplejwt 4.4.0
dparse 0.4.1
drf-yasg 1.17.1
entrypoints 0.3
eradicate 1.0
execnet 1.7.1
flake8 3.7.9
flake8-broken-line 0.1.1
flake8-bugbear 20.1.4
flake8-builtins 1.4.2
flake8-comprehensions 3.2.2
flake8-eradicate 0.3.0
flake8-executable 2.0.3
gevent 1.4.0
gitdb 4.0.2
GitPython 3.1.0
glob2 0.7
gprof2dot 2019.11.30
greenlet 0.4.15
gunicorn 20.0.4
h2 2.6.2
hiredis 1.0.1
hpack 3.0.0
http-ece 1.1.0
hyper 0.7.0
hyperframe 3.2.0
idna 2.9
inflection 0.3.1
ipython 7.13.0
ipython-genutils 0.2.0
itypes 1.1.0
jedi 0.16.0
Jinja2 2.11.1
kombu 4.6.8
Mako 1.1.2
MarkupSafe 1.1.1
mccabe 0.6.1
more-itertools 8.2.0
mypy 0.770
mypy-extensions 0.4.3
packaging 20.3
parse 1.15.0
parse-type 0.5.2
parso 0.6.2
pbr 5.4.4
pexpect 4.8.0
pickleshare 0.7.5
pip 20.0.2
pluggy 0.13.1
prompt-toolkit 3.0.4
psycopg2-binary 2.8.4
ptyprocess 0.6.0
py 1.8.1
py-vapid 1.7.0
pycodestyle 2.5.0
pycparser 2.20
pyflakes 2.1.1
Pygments 2.6.1
PyJWT 1.7.1
pyparsing 2.4.6
pytest 5.4.1
pytest-bdd 3.2.1
pytest-cov 2.8.1
pytest-django 3.8.0
pytest-flake8 1.0.4
pytest-forked 1.1.3
pytest-xdist 1.31.0
python-dateutil 2.8.1
pytz 2019.3
pywebpush 1.10.1
PyYAML 5.3
redis 3.4.1
requests 2.23.0
responses 0.10.12
ruamel.yaml 0.16.10
ruamel.yaml.clib 0.2.0
safety 1.8.7
sentry-sdk 0.14.2
setuptools 46.0.0
six 1.14.0
smmap 3.0.1
SQLAlchemy 1.3.15
sqlparse 0.3.1
stevedore 1.32.0
traitlets 4.3.3
typed-ast 1.4.1
typing-extensions 3.7.4.1
uritemplate 3.0.1
urllib3 1.25.8
vine 1.3.0
wcwidth 0.1.8
wheel 0.34.2

Tried to update pytest from 5.3.5 to 5.4.1
===================================================================================================================== test session starts =====================================================================================================================
platform linux -- Python 3.8.1, pytest-5.4.1, py-1.8.1, pluggy-0.13.1 -- /usr/local/bin/python
cachedir: .pytest_cache
django: settings: core.settings (from ini)
rootdir: /src, inifile: pytest.ini
plugins: cov-2.8.1, bdd-3.2.1, xdist-1.31.0, django-3.8.0, celery-4.4.1, forked-1.1.3, flake8-1.0.4
[gw0] linux Python 3.8.1 cwd: /src
[gw1] linux Python 3.8.1 cwd: /src
[gw2] linux Python 3.8.1 cwd: /src
[gw3] linux Python 3.8.1 cwd: /src
[gw4] linux Python 3.8.1 cwd: /src
[gw5] linux Python 3.8.1 cwd: /src
[gw6] linux Python 3.8.1 cwd: /src
[gw7] linux Python 3.8.1 cwd: /src
[gw1] Python 3.8.1 (default, Jan 18 2020, 02:42:17) -- [GCC 9.2.0]
[gw2] Python 3.8.1 (default, Jan 18 2020, 02:42:17) -- [GCC 9.2.0]
[gw4] Python 3.8.1 (default, Jan 18 2020, 02:42:17) -- [GCC 9.2.0]
gw0 C / gw1 ok / gw2 ok / gw3 C / gw4 ok / gw5 C / gw6 C / gw7 CINTERNALERROR> Traceback (most recent call last):
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/_pytest/main.py", line 191, in wrap_session
INTERNALERROR> session.exitstatus = doit(config, session) or 0
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/_pytest/main.py", line 247, in _main
INTERNALERROR> config.hook.pytest_runtestloop(session=session)
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/pluggy/hooks.py", line 286, in call
INTERNALERROR> return self._hookexec(self, self.get_hookimpls(), kwargs)
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/pluggy/manager.py", line 93, in _hookexec
INTERNALERROR> return self._inner_hookexec(hook, methods, kwargs)
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/pluggy/manager.py", line 84, in
INTERNALERROR> self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/pluggy/callers.py", line 203, in _multicall
INTERNALERROR> gen.send(outcome)
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/pluggy/callers.py", line 80, in get_result
INTERNALERROR> raise ex[1].with_traceback(ex[2])
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/pluggy/callers.py", line 187, in _multicall
INTERNALERROR> res = hook_impl.function(*args)
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/xdist/dsession.py", line 112, in pytest_runtestloop
INTERNALERROR> self.loop_once()
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/xdist/dsession.py", line 135, in loop_once
INTERNALERROR> call(**kwargs)
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/xdist/dsession.py", line 272, in worker_collectreport
INTERNALERROR> self._failed_worker_collectreport(node, rep)
INTERNALERROR> File "/usr/local/lib/python3.8/site-packages/xdist/dsession.py", line 302, in _failed_worker_collectreport
INTERNALERROR> if rep.longrepr not in self._failed_collection_errors:
INTERNALERROR> TypeError: unhashable type: 'ExceptionChainRepr'
Coverage.py warning: No data was collected. (no-data-collected)
Coverage.py warning: No data was collected. (no-data-collected)
Coverage.py warning: No data was collected. (no-data-collected)
Coverage.py warning: No data was collected. (no-data-collected)
Coverage.py warning: No data was collected. (no-data-collected)
Coverage.py warning: No data was collected. (no-data-collected)
Coverage.py warning: No data was collected. (no-data-collected)
Coverage.py warning: No data was collected. (no-data-collected)