pytest Quick Start Guide

Customizing test IDs

Consider this example:

@pytest.mark.parametrize(    "formula, inputs, result",    [        ("x + 3", dict(x=1.0), 4.0,),        ("x - 1", dict(x=6.0), 5.0,),    ],)def test_formula_simple(formula, inputs, result):    ...

As we have seen, pytest automatically creates custom test IDs, based on the parameters used in a parametrized call. Running pytest -v will generate these test IDs:

======================== test session starts ========================...tests/test_formula.py::test_formula_simple[x + 3-inputs0-4.0]tests/test_formula.py::test_formula_simple[x - 1-inputs1-5.0]

If you don't like the automatically generated IDs, you can use pytest.param and the id option to customize it:

@pytest.mark.parametrize(    "formula, inputs, result",    [        pytest.param ...