test-output.txt

$ ansible-test units tests/unit/test_x.py
...
========================================== FAILURES ===========================================
________________________________________ test_my_stuff ________________________________________
[gw0] linux -- Python 3.7.6 /tmp/python-8s1dwmns-ansible/python
def test_my_stuff():
>       assert dict(a=3) == dict(b=2)
E       AssertionError

tests/unit/test_x.py:2: AssertionError


$ pytest tests/unit/test_x.py
...
========================================== FAILURES ===========================================
________________________________________ test_my_stuff ________________________________________

    def test_my_stuff():
>       assert dict(a=3) == dict(b=2)
E       AssertionError: assert {'a': 3} == {'b': 2}
E         Left contains 1 more item:
E         {'a': 3}
E         Right contains 1 more item:
E         {'b': 2}
E         Use -v to get the full diff

tests/unit/test_x.py:2: AssertionError

test_x.py

def test_my_stuff():
    assert dict(a=3) == dict(b=2)