Test conflicts with preinstalled `black` on the system

Not sure what's the exact cause but running with black installed on the system makes test fail.

py -m pytest -p no:pytest-blender tests\multilspy\test_multilspy_python.py --capture=no
# tests\multilspy\test_multilspy_python.py::test_multilspy_python_black PASSED
pip install black
py -m pytest -p no:pytest-blender tests\multilspy\test_multilspy_python.py --capture=no
# tests\multilspy\test_multilspy_python.py::test_multilspy_python_black FAILED

Full error:

tests\multilspy\test_multilspy_python.py::test_multilspy_python_black FAILED

================================================================================= FAILURES =================================================================================
_______________________________________________________________________ test_multilspy_python_black ________________________________________________________________________

    @pytest.mark.asyncio
    async def test_multilspy_python_black():
        """
        Test the working of multilspy with python repository - black
        """
        code_language = Language.PYTHON
        params = {
            "code_language": code_language,
            "repo_url": "https://github.com/psf/black/",
            "repo_commit": "f3b50e466969f9142393ec32a4b2a383ffbe5f23"
        }
        with create_test_context(params) as context:
            lsp = LanguageServer.create(context.config, context.logger, context.source_directory)
            assert isinstance(lsp, JediServer)

            # All the communication with the language server must be performed inside the context manager
            # The server process is started when the context manager is entered and is terminated when the context manager is exited.
            # The context manager is an asynchronous context manager, so it must be used with async with.
            async with lsp.start_server():
                result = await lsp.request_definition(str(PurePath("src/black/mode.py")), 163, 4)

                assert isinstance(result, list)
                assert len(result) == 1
                item = result[0]
                assert item["relativePath"] == str(PurePath("src/black/mode.py"))
                assert item["range"] == {
                    "start": {"line": 163, "character": 4},
                    "end": {"line": 163, "character": 20},
                }
                result = await lsp.request_references(str(PurePath("src/black/mode.py")), 163, 4)

                assert isinstance(result, list)
>               assert len(result) == 8
E               AssertionError: assert 1 == 8
E                +  where 1 = len([{'absolutePath': '.multilspy\\451905597f9045e08699f99b582e63f0\\black-f3b50e466969f9142393ec32a4b2a383ffbe5f23\\src\\black\\mode.py', 'range': {'end': {'character': 20, 'line': 163}, 'start': {'character': 4, 'line': 163}}, 'relativePath': 'src\\black\\mode.py', 'uri': 'file:///c:/.multilspy/451905597f9045e08699f99b582e63f0/black-f3b50e466969f9142393ec32a4b2a383ffbe5f23/src/black/mode.py'}])

tests\multilspy\test_multilspy_python.py:46: AssertionError
---------------------------------------------------------------------------- Captured log call -----------------------------------------------------------------------------
INFO     multilspy:multilspy_logger.py:56 {"time": "2025-03-29 11:21:21", "level": "INFO", "caller_file": "multilspy\\tests\\..\\src\\multilspy\\language_servers\\jedi_language_server\\jedi_server.py", "caller_name": "start_server", "caller_line": 99, "message": "Starting jedi-language-server server process"}
INFO     multilspy:multilspy_logger.py:56 {"time": "2025-03-29 11:21:21", "level": "INFO", "caller_file": "multilspy\\tests\\..\\src\\multilspy\\language_servers\\jedi_language_server\\jedi_server.py", "caller_name": "start_server", "caller_line": 103, "message": "Sending initialize request from LSP client to LSP server and awaiting response"}
========================================================================= short test summary info ==========================================================================
FAILED tests\multilspy\test_multilspy_python.py::test_multilspy_python_black - AssertionError: assert 1 == 8

Start by running the two commands from the issue and compare test_multilspy_python_black in tests/multilspy/test_multilspy_python.py before and after installing black. Trace the test's Python language-server setup and dependency environment; done means the test passes consistently whether black is preinstalled or not.