============================= test session starts ==============================
platform linux -- Python 3.10.1, pytest-6.2.5, py-1.11.0, pluggy-0.13.1
rootdir: /build/python-flasgger/src/flasgger-0.9.5
collected 1 item / 1 error

==================================== ERRORS ====================================
___________________ ERROR collecting tests/test_examples.py ____________________
ImportError while importing test module '/build/python-flasgger/src/flasgger-0.9.5/tests/test_examples.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_examples.py:2: in <module>
    from flex.core import validate
E   ModuleNotFoundError: No module named 'flex'
=============================== warnings summary ===============================
flasgger/utils.py:5
  /build/python-flasgger/src/flasgger-0.9.5/flasgger/utils.py:5: DeprecationWarning: the imp module is deprecated in favour of importlib and slated for removal in Python 3.12; see the module's documentation for alternative uses
    import imp

../../../../usr/lib/python3.10/site-packages/marshmallow/__init__.py:14
  /usr/lib/python3.10/site-packages/marshmallow/__init__.py:14: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
    from distutils.version import LooseVersion

-- Docs: https://docs.pytest.org/en/stable/warnings.html
=========================== short test summary info ============================
ERROR tests/test_examples.py
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
========================= 2 warnings, 1 error in 0.26s =========================
==> ERROR: A failure occurred in check().
    Aborting...