Fixed "DeprecationWarning: the load_module()"

[andriy-kokhan]

This PR fixes a warning as follows:

 <frozen importlib._bootstrap>:283: DeprecationWarning: the load_module() method is deprecated and slated for removal in Python 3.12; use exec_module() instead

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html