### Is your proposal related to a problem? While trying to solve #212, i discover issues when trying to upgrade the tox.ini which was using whitelist_internals, a deprecated keyword. Sent me on a tangent and wrote a drastically different way in PR #219 In order to adopt more conventional ways of using both tox with poetry, shall we try a different way? Issues related: #214, #215, #216, #218 ### Describe the solution you'd like #219 removes tox_install.sh and tool.poetry.dev-dependencies in pyproject.toml altogether in favor of using tool.poetry.extras instead. Another alternative is to use https://pypi.org/project/tox-poetry-installer/