3.0.6: pytest is failing

[kloczek]

I'm trying to package your module as an rpm package. So I'm using the typical PEP517 based build, install and test cycle used on building packages from non-root account.

• python3 -sBm build -w --no-isolation
• because I'm calling build with --no-isolation I'm using during all processes only locally installed modules
• install .whl file in </install/prefix>
• run pytest with PYTHONPATH pointing to sitearch and sitelib inside </install/prefix>

Here is pytest output:

+ PYTHONPATH=/home/tkloczko/rpmbuild/BUILDROOT/python-frontmatter-3.0.6-2.fc35.x86_64/usr/lib64/python3.8/site-packages:/home/tkloczko/rpmbuild/BUILDROOT/python-frontmatter-3.0.6-2.fc35.x86_64/usr/lib/python3.8/site-packages
+ /usr/bin/pytest -ra
=========================================================================== test session starts ============================================================================
platform linux -- Python 3.8.13, pytest-7.1.1, pluggy-1.0.0
rootdir: /home/tkloczko/rpmbuild/BUILD/frontmatter-3.0.6
plugins: datadir-1.3.1, regressions-2.3.1, timeout-2.1.0
collected 0 items / 1 error

================================================================================== ERRORS ==================================================================================
__________________________________________________________________ ERROR collecting tests/test_simple.py ___________________________________________________________________
tests/test_simple.py:3: in <module>
    post = Frontmatter.read_file('./tests/testfile.md')
frontmatter/__init__.py:18: in read_file
    return cls.read(file_contents)
frontmatter/__init__.py:37: in read
    "attributes": yaml.load(fmatter),
E   TypeError: load() missing 1 required positional argument: 'Loader'
========================================================================= short test summary info ==========================================================================
ERROR tests/test_simple.py - TypeError: load() missing 1 required positional argument: 'Loader'
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
============================================================================= 1 error in 0.17s =============================================================================