diff --git a/airflow-core/tests/unit/models/test_callback.py b/airflow-core/tests/unit/models/test_callback.py
index 545361608382d..a9173dbb0c5f6 100644
--- a/airflow-core/tests/unit/models/test_callback.py
+++ b/airflow-core/tests/unit/models/test_callback.py
@@ -100,7 +100,7 @@ class UnknownCallback:
     def test_get_metric_info(self):
         callback = TriggererCallback(TEST_ASYNC_CALLBACK, prefix="deadline_alerts", dag_id=TEST_DAG_ID)
         callback.data["kwargs"] = {"context": {"dag_id": TEST_DAG_ID}, "email": "test@example.com"}
-        metric_info = callback.get_metric_info(CallbackState.SUCCESS, "0")
+        metric_info = callback.get_metric_info(CallbackState.SUCCESS.value, "0")
 
         assert metric_info["stat"] == "deadline_alerts.callback_success"
         assert metric_info["tags"] == {