def test_skipkeys(self):
        pl = {
            42: 'aNumber',
            'snake': 'aWord',
        }

        for fmt in ALL_FORMATS:
            with self.subTest(fmt=fmt):
                data = plistlib.dumps(
                    pl, fmt=fmt, skipkeys=True, sort_keys=False)

                pl2 = plistlib.loads(data)
                self.assertEqual(pl2, {'snake': 'aWord'})

                fp = BytesIO()
                plistlib.dump(
                    pl, fp, fmt=fmt, skipkeys=True, sort_keys=False)
                data = fp.getvalue()
                pl2 = plistlib.loads(fp.getvalue())
                self.assertEqual(pl2, {'snake': 'aWord'})