def METHOD_NAME(self):
    try:
        os.mkdir(test_support.TESTFN)
    except OSError:
        pass
    files = set()
    for name in self.files:
        name = os.path.join(test_support.TESTFN, self.norm(name))
        with open(name, 'w') as f:
            f.write((name+'\n').encode("utf-8"))
        os.stat(name)
        files.add(name)
    self.files = files