chore: collect coverage for all test files

Author: onerandomusername

.github/workflows/lint_test.yml

@@ -162,7 +162,8 @@ jobs:
       # This is saved to ./.coverage to be used by codecov to link a
       # coverage report to github.
       - name: Run tests and generate coverage report
-        run: python -m pytest -n auto --dist loadfile --cov --disable-warnings -q
+        id: run_tests
+        run: python -m pytest tests -n auto --dist loadfile --cov --disable-warnings -q
 
       # This step will publish the coverage reports to coveralls.io and
       # print a "job" link in the output of the GitHub Action

pyproject.toml

@@ -65,7 +65,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.coverage.run]
 branch = true
-source_pkgs = ['modmail', 'tests.modmail']
+source_pkgs = ['modmail', 'tests']
 omit = ["modmail/plugins/**.*"]
 
 [tool.pytest.ini_options]