TST: add same parametrization as a list

Author: fandreuz

pandas/tests/frame/methods/test_sort_index.py

@@ -787,7 +787,10 @@ def test_sort_index_use_inf_as_na(self):
 
     @pytest.mark.parametrize(
         "ascending",
-        [(True, False)],
+        [
+            (True, False),
+            [True, False]
+        ],
     )
     def test_sort_index_ascending_tuple(self, ascending):
         df = DataFrame(