0.5.3: pytest is failing in some units

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I'm packaging 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> using 'installer` module
run pytest with $PYTHONPATH pointing to sitearch and sitelib inside </install/prefix>
build is performed in env which is cut off from access to the public network (pytest is executed with -m "not network")

Here is list of installed modules in build env

Package                       Version
----------------------------- -------
alabaster                     0.7.13
asttokens                     2.2.1
Babel                         2.12.1
backcall                      0.2.0
build                         0.10.0
charset-normalizer            3.1.0
contourpy                     1.0.7
cycler                        0.11.0
decorator                     5.1.1
distro                        1.8.0
docutils                      0.19
exceptiongroup                1.1.1
executing                     1.2.0
fonttools                     4.39.4
gpg                           1.20.0
idna                          3.4
imagesize                     1.4.1
importlib-metadata            6.6.0
iniconfig                     2.0.0
installer                     0.7.0
ipython                       8.12.0
jedi                          0.18.2
Jinja2                        3.1.2
kiwisolver                    1.4.4
libcomps                      0.1.19
MarkupSafe                    2.1.2
matplotlib                    3.6.3
matplotlib-inline             0.1.6
numpy                         1.24.3
olefile                       0.46
packaging                     23.1
parso                         0.8.3
pexpect                       4.8.0
pickleshare                   0.7.5
Pillow                        9.5.0
pluggy                        1.0.0
prompt-toolkit                3.0.38
ptyprocess                    0.7.0
pure-eval                     0.2.2
Pygments                      2.15.1
pyparsing                     3.0.9
pyproject_hooks               1.0.0
pytest                        7.3.1
python-dateutil               2.8.2
pytz                          2023.2
requests                      2.30.0
setuptools                    67.7.2
six                           1.16.0
snowballstemmer               2.2.0
Sphinx                        6.2.1
sphinxcontrib-applehelp       1.0.4
sphinxcontrib-devhelp         1.0.2
sphinxcontrib-htmlhelp        2.0.0
sphinxcontrib-jsmath          1.0.1
sphinxcontrib-qthelp          1.0.3
sphinxcontrib-serializinghtml 1.1.5
stack-data                    0.6.2
tomli                         2.0.1
traitlets                     5.9.0
typing_extensions             4.5.0
urllib3                       1.26.15
wcwidth                       0.2.6
wheel                         0.40.0
zipp                          3.15.0

Start by reproducing the PEP517 commands using python3 -sBm build -w --no-isolation, the installed wheel, the specified PYTHONPATH, and pytest with -m "not network". The payload does not name failing tests or provide failure output, so identify the affected units first; done means the package completes this offline build, install, and test cycle.

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