diff --git a/tests/processor/test_batch_processor.py b/tests/processor/test_batch_processor.py
index f51bc3edb..3aee48d1d 100644
--- a/tests/processor/test_batch_processor.py
+++ b/tests/processor/test_batch_processor.py
@@ -1175,4 +1175,4 @@ def test_task_processing_creates_new_transition():
     # The task should be processed correctly (wrapped in list)
     assert result[TransitionKey.COMPLEMENTARY_DATA]["task"] == ["sort_objects"]
     # Original complementary data is also modified (current behavior)
-    assert original_comp_data["task"] == ["sort_objects"]
+    assert original_comp_data["task"] == "sort_objects"