pytest — consistent, native idioms

pytest is stable, but training data is saturated with unittest style, so generated tests import TestCase into pytest projects, hand-roll setup/teardown, loop over cases inside one test, and try/except around code that should use pytest.raises. This skill pins the native pytest idiom set — pytest 8 semantics — so tests are flat, parametrized, and fixture-driven.

Canonical idioms — always X, never Y