Pytest issues: fix tests or main.py

[julietteyek]

have a look at the pytest errors and fix them accordingly in the test-file. If the error isn't in the test-file, then please have a look if the error lies in the main.py.

[Jxshyz]

The main issue was that we didn't define the root directory correctly and therefore the imports raised an error.

That hast been successfully fixed now! 🤙

Please take a look at our pytest - we made some minor changes sind this file was created and it therefore needs to be updated.