Warning with default_app_config

[niconil]

when launching unit test in my Django project (Django 3.2)

coverage run $(which pytest)

i get the following warning

RemovedInDjango41Warning: 'cspreports' defines default_app_config = 'cspreports.apps.CSPReportsConfig'. Django now detects this configuration automatically. You can remove default_app_config.

(declared in cspreports/init.py)
nevertheless when i run other command with manage.py (manage.py runserver, manage.py makemigrations, ...) i don't have this warning