diff --git a/pandas/tests/indexing/test_timedelta.py b/pandas/tests/indexing/test_timedelta.py
index 6be9d46ed99d7..be3ea8f0c371d 100644
--- a/pandas/tests/indexing/test_timedelta.py
+++ b/pandas/tests/indexing/test_timedelta.py
@@ -22,10 +22,11 @@ def test_boolean_indexing(self):
                                     dtype='int64')
             tm.assert_frame_equal(expected, result)
 
-    @pytest.mark.parametrize("indexer, expected",
-                             [(0, [20, 1, 2, 3, 4, 5, 6, 7, 8, 9]),
-                              (slice(4, 8), [0, 1, 2, 3, 20, 20, 20, 20, 8, 9],),
-                              ([3, 5], [0, 1, 2, 20, 4, 20, 6, 7, 8, 9])])
+    @pytest.mark.parametrize(
+        "indexer, expected",
+        [(0, [20, 1, 2, 3, 4, 5, 6, 7, 8, 9]),
+         (slice(4, 8), [0, 1, 2, 3, 20, 20, 20, 20, 8, 9]),
+         ([3, 5], [0, 1, 2, 20, 4, 20, 6, 7, 8, 9])])
     def test_list_like_indexing(self, indexer, expected):
         # GH 16637
         df = pd.DataFrame({'x': range(10)}, dtype="int64")