diff --git a/libs/core/tests/unit_tests/runnables/test_runnable.py b/libs/core/tests/unit_tests/runnables/test_runnable.py
index 52c68271bae..7d230051457 100644
--- a/libs/core/tests/unit_tests/runnables/test_runnable.py
+++ b/libs/core/tests/unit_tests/runnables/test_runnable.py
@@ -2159,7 +2159,11 @@ async def test_prompt_with_llm(
                 "value": {
                     "end_time": None,
                     "final_output": None,
-                    "metadata": {"ls_model_type": "llm", "ls_provider": "fakelist"},
+                    "metadata": {
+                        "ls_model_type": "llm",
+                        "ls_provider": "fakelist",
+                        "ls_tools_called": [],
+                    },
                     "name": "FakeListLLM",
                     "start_time": "2023-01-01T00:00:00.000+00:00",
                     "streamed_output": [],