Django, tests failing when moving applications to another folder?

Question

Django

Hi everyone, thanks in advance for your replies.
I began to create a separate folder for applications "apps" in projects and transfer all applications there. I corrected INSTALLED_APPS, and in the applications themselves, name in apps.py and everything works except for tests, they are simply not visible. Tell me where I didn’t add anything, or maybe it’s not right to put all the applications in one folder?