I am new to poetry and want to get it set-up with pytest. I have a package mylib in the following set-up ├── dist │ ├── mylib-0.0.1-py3-none-any.whl │ └── mylib-0.0.1.tar.gz ├── poetry.lock ├── mylib │ ├── functions.py │ ├── __init__.py │ └── utils.py ├── pyproject.toml ├── README.md └── tests └── test_functions.py in test_functions I have import mylib However, when I run poetry run pytest it complains about mylib not being included. I can run pip install dist/mylib-0.0.1-py3-none-any.whl but that clutters my python environment with mylib. I want to use that environment as well for other packages. My question is: What is the proper way to work with poetry and pytest? My underlying python environment is a clean pyenv python 3.8. Using pyproject.toml I create a project based virtual environment for mylib. Continue reading...