Skip to content

pytest-raises-too-broad (PT011)#

Derived from the flake8-pytest-style linter.

What it does#

Checks for pytest.raises calls without a match parameter.

Why is this bad?#

pytest.raises(Error) will catch any Error and may catch errors that are unrelated to the code under test. To avoid this, pytest.raises should be called with a match parameter. The exception names that require a match parameter can be configured via the flake8-pytest-style.raises-require-match-for and flake8-pytest-style.raises-extend-require-match-for settings.

Example#

import pytest


def test_foo():
    with pytest.raises(ValueError):
        ...

    # empty string is also an error
    with pytest.raises(ValueError, match=""):
        ...

Use instead: 

import pytest


def test_foo():
    with pytest.raises(ValueError, match="expected message"):
        ...

Options#

References#