def METHOD_NAME(self) -> None:
    """Test the subst_path() method on a non-substitution string
    """
    self.env.subst = lambda s, target, source, conv: 'NOT THIS STRING'
    pl = SCons.PathList.PathList(('x',))
    result = pl.subst_path(self.env, 'y', 'z')
    assert result == ('x',), result