============================= test session starts ==============================
platform linux -- Python 3.12.1, pytest-8.0.0, pluggy-1.4.0
rootdir: /project
collected 5 items

tests/test_main.py ...F.                                                 [100%]

=================================== FAILURES ===================================
________________________________ test_subtract _________________________________

    def test_subtract():
>       assert subtract(5, 3) == 3
E       assert 2 == 3
E        +  where 2 = subtract(5, 3)

tests/test_main.py:15: AssertionError
=========================== short test summary info ============================
FAILED tests/test_main.py::test_subtract - assert 2 == 3
========================= 1 failed, 4 passed in 0.15s =========================