diff --git a/libs/core/pyproject.toml b/libs/core/pyproject.toml
index 25c5bc15448..9ee8c43bf4c 100644
--- a/libs/core/pyproject.toml
+++ b/libs/core/pyproject.toml
@@ -14,10 +14,16 @@ repository = "https://github.com/langchain-ai/langchain"
 [tool.mypy]
 disallow_untyped_defs = "True"
 exclude = [ "notebooks", "examples", "example_data", "langchain_core/pydantic", "tests/unit_tests/utils/test_function_calling.py",]
+
 [[tool.mypy.overrides]]
 module = [ "numpy", "pytest",]
 ignore_missing_imports = true
 
+
+[[tool.mypy.overrides]]
+module = "tests.unit_tests.runnables.test_lint_base.py"
+strict = true
+
 [tool.poetry.urls]
 "Source Code" = "https://github.com/langchain-ai/langchain/tree/master/libs/core"
 "Release Notes" = "https://github.com/langchain-ai/langchain/releases?q=tag%3A%22langchain-core%3D%3D0%22&expanded=true"