0.7.0: pytest warning

I'm trying to package your module as an rpm package. So I'm using the typical build, install and test cycle used on building packages from non-root account.

• "setup.py build"
• "setup.py install --root </install/prefix>"
• "pytest with PYTHONPATH pointing to sitearch and sitelib inside </install/prefix>

+ PYTHONPATH=/home/tkloczko/rpmbuild/BUILDROOT/python-sphinxcontrib-openapi-0.7.0-4.fc35.x86_64/usr/lib64/python3.8/site-packages:/home/tkloczko/rpmbuild/BUILDROOT/python-sphinxcontrib-openapi-0.7.0-4.fc35.x86_64/usr/lib/python3.8/site-packages
+ /usr/bin/pytest -ra --import-mode=importlib tests/ --strict -p no:randomly
=========================================================================== test session starts ============================================================================
platform linux -- Python 3.8.11, pytest-6.2.5, py-1.10.0, pluggy-0.13.1
benchmark: 3.4.1 (defaults: timer=time.perf_counter disable_gc=False min_rounds=5 min_time=0.000005 max_time=1.0 calibration_precision=10 warmup=False warmup_iterations=100000)
rootdir: /home/tkloczko/rpmbuild/BUILD/openapi-0.7.0
plugins: forked-1.3.0, shutil-1.7.0, virtualenv-1.7.0, expect-1.1.0, flake8-1.0.7, timeout-1.4.2, betamax-0.8.1, freezegun-0.4.2, aspectlib-1.5.2, toolbox-0.5, rerunfailures-9.1.1, requests-mock-1.9.3, cov-2.12.1, flaky-3.7.0, benchmark-3.4.1, xdist-2.3.0, pylama-7.7.1, datadir-1.3.1, regressions-2.2.0, cases-3.6.3, xprocess-0.18.1, black-0.3.12, anyio-3.3.0, asyncio-0.15.1, trio-0.7.0, subtests-0.5.0, isort-2.0.0, hypothesis-6.14.6, mock-3.6.1, profiling-1.7.0, Faker-8.12.1, nose2pytest-1.0.8, pyfakefs-4.5.1, tornado-0.8.1, twisted-1.13.3
collected 223 items

tests/test_openapi.py .................................                                                                                                              [ 14%]
tests/test_schema_utils.py .........                                                                                                                                 [ 18%]
tests/test_spec_examples.py .........                                                                                                                                [ 22%]
tests/renderers/httpdomain/test_render_operation.py .............                                                                                                    [ 28%]
tests/renderers/httpdomain/test_render_parameter.py ..........................................                                                                       [ 47%]
tests/renderers/httpdomain/test_render_parameters.py .............                                                                                                   [ 53%]
tests/renderers/httpdomain/test_render_paths.py .........                                                                                                            [ 57%]
tests/renderers/httpdomain/test_render_request_body_example.py .........................                                                                             [ 68%]
tests/renderers/httpdomain/test_render_response.py ....................................                                                                              [ 84%]
tests/renderers/httpdomain/test_render_response_content.py ..............................                                                                            [ 98%]
tests/renderers/httpdomain/test_render_responses.py ....                                                                                                             [100%]

============================================================================= warnings summary =============================================================================
../../../../../usr/lib/python3.8/site-packages/_pytest/config/__init__.py:1183
  /usr/lib/python3.8/site-packages/_pytest/config/__init__.py:1183: PytestDeprecationWarning: The --strict option is deprecated, use --strict-markers instead.
    self.issue_config_time_warning(

-- Docs: https://docs.pytest.org/en/stable/warnings.html
====================================================================== 223 passed, 1 warning in 3.54s ======================================================================
pytest-xprocess reminder::Be sure to terminate the started process by running 'pytest --xkill' if you have not explicitly done so in your fixture with 'xprocess.getinfo(<process_name>).terminate()'.

BTW test suite. Looks like test suite needs only two files from OpenAPI-Specification: tests/OpenAPI-Specification/examples/v3.0/petstore.yaml and tests/OpenAPI-Specification/examples/v2.0/json/uber.json.
Is it not would be easier to just copy those two files into git repo instead linking submodule?

Start by reviewing the pytest command and the test-suite references to the OpenAPI-Specification submodule. Confirm whether the deprecated --strict warning comes from project configuration or the packaging test invocation, and assess whether tests/OpenAPI-Specification/examples/v3.0/petstore.yaml and tests/OpenAPI-Specification/examples/v2.0/json/uber.json can be copied into the repository without breaking the suite.