def METHOD_NAME(self):
    with change_ets_app_dir(self.temp_dir) as cache_file:
        # ensure we get empty list of system .ttf files
        with patch_global_font_manager(None), patch_system_fonts([]):
            with self.assertWarns(UserWarning):
                font_manager = FontManager()
            self.assertTrue("ttf" in font_manager.default_font)
            self.assertEqual(
                os.path.basename(font_manager.default_font["ttf"]),
                "Montserrat-Regular.ttf",
            )
            self.assertTrue(
                os.path.exists(font_manager.default_font["ttf"]),
            )