I have an existing Python project which looks like this:

.venv/
    ...
example_package/
    __init__.py
tests/
    test_example_package.py

Imagine that I worked on this project for a while and then decided to add a frontend to some kind of web service using React.

I created a new directory called React, and a new directory called Python to organize my code.

The project structure now looks like this:

Python/
    .venv/
        ...
    example_package/
        __init__.py
    tests/
       test_example_package.py
React/
    ...

But there is a problem. My tests no longer work. So I ran the VS Code “configure tests” command and set the subdirectory where the tests are to be found to Python. But this did not fix the whole issue, and the pytest discovery process fails with the following error:

ModuleNotFoundError: No module named 'example_package'

It seems relatively obvious as to what is happening. pytest is being run by VS Code, with a current working directory set to . instead of ./Python/.

How can I fix this?