'A L{bytes} extension to C{temporarySibling} will mean a L{bytes} mode
L{FilePath} is returned.'

def test_mixedTypeTemporarySibling(self):

    fp = filepath.FilePath(u'./mon\u20acy')
    tempSibling = fp.temporarySibling('.txt')
    self.assertIsInstance(tempSibling.path, bytes)
