Modify test_loc_setitem_frame_mixed_labels accordingly

pandas/tests/indexing/test_loc.py

@@ -807,7 +807,7 @@ def test_loc_setitem_frame_mixed_labels(self):
 
         result = df.loc[0, [1, 2]]
         expected = Series(
-            [1, 3], index=Index([1, 2], dtype=object), dtype=object, name=0
+            [1, 3], index=Index([1, 2], dtype=object), dtype="int64", name=0
         )
         tm.assert_series_equal(result, expected)