============================= test session starts ==============================
platform linux -- Python 3.10.1, pytest-6.2.5, py-1.11.0, pluggy-0.13.1
rootdir: /build/python-pytest-mpl/src/python-pytest-mpl, configfile: setup.cfg, testpaths: tests
plugins: cov-2.12.1
collected 0 items / 1 error

==================================== ERRORS ====================================
__________________ ERROR collecting tests/test_pytest_mpl.py ___________________
ImportError while importing test module '/build/python-pytest-mpl/src/python-pytest-mpl/tests/test_pytest_mpl.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib/python3.10/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
tests/test_pytest_mpl.py:9: in <module>
    import matplotlib
E   ModuleNotFoundError: No module named 'matplotlib'
=========================== short test summary info ============================
ERROR tests/test_pytest_mpl.py
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
=============================== 1 error in 0.31s ===============================
==> ERROR: A failure occurred in check().
    Aborting...