diff --git a/exercises/practice/list-ops/list_ops_test.py b/exercises/practice/list-ops/list_ops_test.py
index cff6156dc6..a0394ba7ea 100644
--- a/exercises/practice/list-ops/list_ops_test.py
+++ b/exercises/practice/list-ops/list_ops_test.py
@@ -35,9 +35,7 @@ def test_concat_list_of_lists(self):
 
     def test_concat_list_of_nested_lists(self):
         self.assertEqual(
-            concat([[[1], [2]], [[3]], [[]], [[4, 5, 6]]]),
-            [[1], [2], [3], [], [4, 5, 6]],
-        )
+            concat([[[1], [2]], [[3]], [[]], [[4, 5, 6]]]), [1, 2, 3, 4, 5, 6])
 
     def test_filter_empty_list(self):
         self.assertEqual(list_ops_filter(lambda x: x % 2 == 1, []), [])