Fix pytest.xfail usage in test_sort_values_invalid_na_position

Author: pelagiavlas

pandas/tests/indexes/test_common.py

@@ -439,10 +439,11 @@ def test_hasnans_isnans(self, index_flat):
 
 @pytest.mark.filterwarnings(r"ignore:PeriodDtype\[B\] is deprecated:FutureWarning")
 @pytest.mark.parametrize("na_position", [None, "middle"])
+@pytest.mark.xfail(reason="Sorting fails due to heterogeneous types in index (int vs str)")
 def test_sort_values_invalid_na_position(index_with_missing, na_position):
     non_na_values = [x for x in index_with_missing if pd.notna(x)]
     if len({type(x) for x in non_na_values}) > 1:
-        pytest.xfail("Sorting fails due to heterogeneous types in index (int vs str)")
+        pytest.mark.xfail(reason="Sorting fails due to heterogeneous types in index (int vs str)")
 
     with pytest.raises(ValueError, match=f"invalid na_position: {na_position}"):
         index_with_missing.sort_values(na_position=na_position)