AttributeError: module 'hammett' has no attribute 'PytestWarning'

[barseghyanartur]

Error:

File "/home/me/.virtualenvs/env/lib/python3.10/site-packages/pytest_cov/plugin.py", line 17, in <module>
    class PytestCovWarning(pytest.PytestWarning):
AttributeError: module 'hammett' has no attribute 'PytestWarning'

pip list:

hammett                       0.9.3
pytest                        7.2.1
pytest-cov                    4.0.0
pytest-cover                  3.0.0
pytest-coverage               0.0
pytest-django                 4.5.2
pytest-ordering               0.6
pytest-parallel               0.1.1
pytest-pretty                 1.0.1
pytest-rerunfailures          11.0

setup.cfg

[hammett]
source_location=src/
plugins=
    pytest_cov
    pytest_django
    pytest_ordering
    pytest_parallel
    pytest_rerunfailures

Python version
3.10.9