diff --git a/tests/test_anchor_prose_incremental_finalize.py b/tests/test_anchor_prose_incremental_finalize.py
index f81bb432..79cbc845 100644
--- a/tests/test_anchor_prose_incremental_finalize.py
+++ b/tests/test_anchor_prose_incremental_finalize.py
@@ -463,3 +463,4 @@ def test_interim_assistant_to_tool_boundary_must_render_full_authoritative_punct
     assert data["toolSourceEventType"] == "tool"
     assert data["proseSourceText"] == data["authoritativeText"]
     assert data["proseRenderedText"] == data["authoritativeText"]
+    assert data["finalizeCount"] == 1