'find_command should still work when the PATH environment variable
doesn\'t exist (#22256).'

def test_find_command_without_PATH(self):

    current_path = os.environ.pop('PATH', None)
    try:
        self.assertIsNone(find_command('_missing_'))
    finally:
        if (current_path is not None):
            os.environ['PATH'] = current_path
