Codecov not reporting correctly

[marksweb]

Describe the bug
Coverage from tox reports all the files in the application correctly, however codecov which is used by github actions only includes the __init__.py and forms.py files;
https://app.codecov.io/gh/marksweb/django-bleach/

To Reproduce
Steps to reproduce the behavior:

1. Go to https://app.codecov.io/gh/marksweb/django-bleach/
2. Scroll down to the files section at the bottom
3. See list of files included in results

Expected behavior
A list of all files in the app, similar to;

__init__.py
forms.py
models.py
templatetags/__init__.py
templatetags/bleach_tags.py
utils.py

Screenshots