2 test failures after update to 5.0.4

[apteryks]

Hello,

After updating the GNU Guix python-flake8 package to 5.0.4, I encounter the following two test failures:

=================================== FAILURES ===================================
____________ test_all_pyflakes_messages_have_flake8_codes_assigned _____________

    def test_all_pyflakes_messages_have_flake8_codes_assigned():
        """Verify all PyFlakes messages have error codes assigned."""
        messages = {
            name
            for name, obj in vars(pyflakes.messages).items()
            if name[0].isupper() and obj.message
        }
>       assert messages == set(pyflakes_shim.FLAKE8_PYFLAKES_CODES)
E       AssertionError: assert {'AssertTuple...NotLast', ...} == {'AssertTuple...NotLast', ...}
E         Extra items in the left set:
E         'ReturnWithArgsInsideGenerator'
E         'RedefinedInListComp'
E         Full diff:
E           {
E            'AssertTuple',
E            'BreakOutsideLoop',...
E         
E         ...Full output truncated (48 lines hidden), use '-vv' to show

tests/unit/test_pyflakes_codes.py:16: AssertionError
_______________________________ test_up_to_date ________________________________

    def test_up_to_date():
        """Validate that the generated pycodestyle plugin is up to date.
    
        We generate two "meta" plugins for pycodestyle to avoid calling overhead.
    
        To regenerate run:
    
            ./bin/gen-pycodestyle-plugin > src/flake8/plugins/pycodestyle.py
        """
    
        path = os.path.join(HERE, "../../../bin/gen-pycodestyle-plugin")
        name = os.path.basename(path)
        loader = importlib.machinery.SourceFileLoader(name, path)
        spec = importlib.util.spec_from_loader(loader.name, loader)
        assert spec is not None
        mod = importlib.util.module_from_spec(spec)
>       loader.exec_module(mod)

tests/unit/plugins/pycodestyle_test.py:26: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
<frozen importlib._bootstrap_external>:846: in exec_module
    ???
<frozen importlib._bootstrap_external>:982: in get_code
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <_frozen_importlib_external.SourceFileLoader object at 0x7ffff5c60bb0>
path = '/tmp/guix-build-python-flake8-5.0.4.drv-0/flake8-5.0.4/tests/unit/plugins/../../../bin/gen-pycodestyle-plugin'

>   ???
E   FileNotFoundError: [Errno 2] No such file or directory: '/tmp/guix-build-python-flake8-5.0.4.drv-0/flake8-5.0.4/tests/unit/plugins/../../../bin/gen-pycodestyle-plugin'

<frozen importlib._bootstrap_external>:1039: FileNotFoundError
======================== 2 failed, 476 passed in 1.45s =========================

This is with Python 3.9.9 and the following direct dependencies:
python-importlib-metadata@4.11.3 python-mccabe@0.6.1 python-pycodestyle@2.9.1

Any ideas what's going wrong?