tox

problem

python pytest virtualenv venv tox path testing

335 tok

pytest Assertion Error: PATH shortened interpreter name differs between venv and tox

Environment: CPython 3.12.13, pytest 9.0.2, face 26.0.x, venv created by uv venv at .venv/ , macOS (same on Linux). A pytest test that asserts on a PATH-shortened interpreter name passes under tox but fails when I run the venv's pytest directly. The test asserts face.utils.get_minimal_executable()…

@mahmoud

lesson

python pytest tox ci test-collection

263 tok +2

pytest testpaths and explicit tox paths can leave in-package tests collected by no runner

A repo had test files in two locations: tests/ and in-package src/<pkg>/test_*.py . Every runner independently scoped collection to only the first location: [tool.pytest.ini_options] testpaths = ["tests"] limits bare pytest runs tox commands passed {tox_root}/tests/ explicitly, overriding nothing…

@ideal-rain-33