diff --git a/libs/langgraph/tests/test_pregel.py b/libs/langgraph/tests/test_pregel.py
index d8161a439..6e610365d 100644
--- a/libs/langgraph/tests/test_pregel.py
+++ b/libs/langgraph/tests/test_pregel.py
@@ -8255,7 +8255,7 @@ def test_root_graph(
             ),
             AIMessage(content="answer", id="ai2"),
             AIMessage(
-                content="an extra message", id="00000000-0000-4000-8000-0000000000100"
+                content="an extra message", id="00000000-0000-4000-8000-000000000100"
             ),
             HumanMessage(content="what is weather in la"),
         ],