diff --git a/tests/test_workitem_attachments.py b/tests/test_workitem_attachments.py
index d1a82e7..e631b3c 100644
--- a/tests/test_workitem_attachments.py
+++ b/tests/test_workitem_attachments.py
@@ -417,7 +417,7 @@ def test_update_context_diagram_no_changes(
     converter = model_converter.ModelConverter(model, "TEST")
     worker.polarion_data_repo = polarion_repo.PolarionDataRepository(
         [
-            data_model.CapellaWorkItem(
+            old := data_model.CapellaWorkItem(
                 WORKITEM_ID,
                 uuid_capella=TEST_PHYS_FNC,
                 checksum=json.dumps(
@@ -442,6 +442,10 @@ def test_update_context_diagram_no_changes(
             converter.converter_session[TEST_PHYS_FNC]
         )
 
+    assert (
+        converter.converter_session[TEST_PHYS_FNC].work_item.checksum
+        == old.checksum
+    )
     assert worker.project_client.work_items.update.call_count == 0
     assert worker.project_client.work_items.attachments.update.call_count == 0
     assert wrapped_render.call_count == 0