pytest Quick Start Guide

Applying marks to value sets

Often, in parametrized tests, you find the need to apply one or more marks to a set of parameters as you would to a normal test function. For example, you want to apply a timeout mark to one set of parameters because it takes too long to run, or xfail a set of parameters, because it has not been implemented yet.

In those cases, use pytest.param to wrap the set of values and apply the marks you want:

@pytest.mark.parametrize(    "formula, inputs, result",    [        ...        ("log(x) + 3", dict(x=2.71828182846), 4.0),        pytest.param(            "hypot(x, y)", dict(x=3, y=4), 5.0,            marks=pytest.mark.xfail(reason="not implemented: #102"),        ),    ],)

The signature of pytest.param is this:

pytest.param(*values, **kw)

Where:

• *values is the parameter ...