diff --git a/libs/core/tests/unit_tests/runnables/test_config.py b/libs/core/tests/unit_tests/runnables/test_config.py
index 7ffb407a1b5..2a9b6e9d09d 100644
--- a/libs/core/tests/unit_tests/runnables/test_config.py
+++ b/libs/core/tests/unit_tests/runnables/test_config.py
@@ -235,7 +235,7 @@ def test_inherit_run_name_with_chain() -> None:
     captured_names: list[str] = []
 
     class TestCallbackHandler(BaseCallbackHandler):
-        def on_chain_start(self, serialized: dict, inputs: Any, **kwargs: Any) -> None:
+        def on_chain_start(self, _serialized: dict, _inputs: Any, **kwargs: Any) -> None:
             name = kwargs.get("name", "unnamed")
             captured_names.append(name)
 
@@ -369,3 +369,4 @@ def test_inherit_run_name_merge_configs() -> None:
     )
     assert ensured.get("run_name") == "test_run", "run_name should be preserved"
 
+