TST: xfail test for pandas-devgh-16234

Author: toobaz

pandas/tests/tseries/test_timezones.py

@@ -1177,6 +1177,9 @@ def test_tz_convert_tzlocal(self):
         dti2 = dti.tz_convert(None)
         tm.assert_numpy_array_equal(dti2.asi8, dti.asi8)
 
+    @pytest.mark.xfail(reason='See gh-16234')
+    def test_ambiguous_flags(self):
+        raise NotImplementedError
 
 class TestTimeZoneCacheKey(tm.TestCase):