Fixtures in multiple conftest files run in nested order

[guy-saban-ws]

I have the following project structure

├─Root
├── Folder
└── Tests
    ├── conftest.py
    ├── TestsA
    │    ├── SubFolderAA
    │    │    ├── test_aaa.py
    │    │    └── test_aab.py
    │    └── SubFolderAB
    │         ├── test_aba.py
    │         └── test_abb.py
    └─── TestsB
         ├── SubFolderBA
         │    ├── test_baa.py
         │    └── test_bab.py
         └── SubFolderBB
              ├── test_bba.py
              └── test_bbb.py

I have a fixture I want to run for every Tests_ folder (TestsA and TestsB), so I created a fixture with scope package

@pytest.fixture(scope='package', autouse=True)
def package_setup_and_teardown():
    # setup
    yield
    # teardown

When added in conftest.py under Tests it runs only ones although I added __init__.py file to TestsA and TestsB to make them a package.

When I added a conftest.py with the fixture to each of the Tests_ folders both executed the setup code before the tests under it, but executed the teardown code only after all the tests finished, and as if they were executed as nested:

package_setup_and_teardown for TestsA (setup)
tests under TestsA
package_setup_and_teardown for TestsB (setup)
tests under TestsB
package_setup_and_teardown for TestsB (teardown)
package_setup_and_teardown for TestsA (teardown)

Which causes some issues, especially since I have more than two Tests_ folders.

Why does it behave like this, and more important how can I solve it without flattening the test hierarchy or adding conftest.py to every SubFolder.

I'm using Python 3.8 and Pytest 6.2.2 if it makes any difference.