Hi folks,

I was using pytest.approx and I found a scenario when using approx in a collection or sequence that can have multiples types, the problem arise when doing:

def test_approx_str(): assert [1.0, 2.0, "abc"] == approx([1.0, 2.0, "aaa"])

I was expecting pytest to bypass the approx for str type, but I am seeing the following error:

 def test_approx_str(): > assert [1.0, 2.0, "abc"] == approx([1.0, 2.0, "aaa"]) E AssertionError: assert [1.0, 2.0, 'abc'] == approx([1.0 ±...2.0e-06, aaa]) E E (pytest_assertion plugin: representation of details failed: /tmp/test_a/.venv/lib/python3.12/site-packages/_pytest/python_api.py:343: TypeError: unsupported operand type(s) for -: 'str' and 'str'. E Probably an object has a faulty __repr__.) test_foo.py:5: AssertionError

let me know if you need more info about this

Package Version --------- ------- iniconfig 2.0.0 packaging 24.2 pluggy 1.5.0 pytest 8.3.3

• a detailed description of the bug or problem you are having
• output of pip list from the virtual environment you are using
• pytest and operating system versions
• minimal example if possible