python-ptyprocess fails to build with Python 3.13.0a1.

+ /usr/bin/python3 -m pytest -v
============================= test session starts ==============================
platform linux -- Python 3.13.0a1, pytest-7.4.2, pluggy-1.3.0 -- /usr/bin/python3
cachedir: .pytest_cache
rootdir: /builddir/build/BUILD/ptyprocess-0.7.0
collecting ... collected 13 items / 1 error

==================================== ERRORS ====================================
________________ ERROR collecting tests/test_invalid_binary.py _________________
/usr/lib/python3.13/site-packages/_pytest/runner.py:341: in from_call
    result: Optional[TResult] = func()
/usr/lib/python3.13/site-packages/_pytest/runner.py:372: in <lambda>
    call = CallInfo.from_call(lambda: list(collector.collect()), "collect")
/usr/lib/python3.13/site-packages/_pytest/python.py:531: in collect
    self._inject_setup_module_fixture()
/usr/lib/python3.13/site-packages/_pytest/python.py:545: in _inject_setup_module_fixture
    self.obj, ("setUpModule", "setup_module")
/usr/lib/python3.13/site-packages/_pytest/python.py:310: in obj
    self._obj = obj = self._getobj()
/usr/lib/python3.13/site-packages/_pytest/python.py:528: in _getobj
    return self._importtestmodule()
/usr/lib/python3.13/site-packages/_pytest/python.py:617: in _importtestmodule
    mod = import_path(self.path, mode=importmode, root=self.config.rootpath)
/usr/lib/python3.13/site-packages/_pytest/pathlib.py:567: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.13/importlib/__init__.py:88: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:1381: in _gcd_import
    ???
<frozen importlib._bootstrap>:1354: in _find_and_load
    ???
<frozen importlib._bootstrap>:1325: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:929: in _load_unlocked
    ???
/usr/lib/python3.13/site-packages/_pytest/assertion/rewrite.py:178: in exec_module
    exec(co, module.__dict__)
tests/test_invalid_binary.py:73: in <module>
    suite = unittest.makeSuite(InvalidBinaryChars,'test')
/usr/lib64/python3.13/unittest/__init__.py:80: in __getattr__
    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
E   AttributeError: module 'unittest' has no attribute 'makeSuite'
=========================== short test summary info ============================
ERROR tests/test_invalid_binary.py - AttributeError: module 'unittest' has no...
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!

According to https://docs.python.org/3.13/whatsnew/3.13.html:

Removed the following unittest functions, deprecated in Python 3.11:
- unittest.findTestCases()
- unittest.makeSuite()
- unittest.getTestCaseNames()


https://docs.python.org/3.13/whatsnew/3.13.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.13/fedora-rawhide-x86_64/06573427-python-ptyprocess/

For all our attempts to build python-ptyprocess with Python 3.13, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.13/package/python-ptyprocess/

Testing and mass rebuild of packages is happening in copr.
You can follow these instructions to test locally in mock if your package builds with Python 3.13:
https://copr.fedorainfracloud.org/coprs/g/python/python3.13/

Let us know here if you have any questions.

Python 3.13 is planned to be included in Fedora 41.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.13.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires),
so if this package is required a lot, it's important for us to get it fixed soon.

We'd appreciate help from the people who know this package best,
but if you don't want to work on this now, let us know so we can try to work around it on our side.