diff --git a/libs/core/tests/unit_tests/utils/test_function_calling.py b/libs/core/tests/unit_tests/utils/test_function_calling.py
index 257b8b50578..464baceb343 100644
--- a/libs/core/tests/unit_tests/utils/test_function_calling.py
+++ b/libs/core/tests/unit_tests/utils/test_function_calling.py
@@ -549,7 +549,7 @@ def test_convert_to_openai_function_strict_union_type() -> None:
     }
 
     actual = convert_to_openai_function(my_function, strict=True)
-    assert actual == expected, str(actual)
+    assert actual == expected
 
 
 json_schema_no_description_no_params = {