diff --git a/libs/core/pyproject.toml b/libs/core/pyproject.toml
index 93ac1c0db7e..a7e3cb26252 100644
--- a/libs/core/pyproject.toml
+++ b/libs/core/pyproject.toml
@@ -103,6 +103,8 @@ ignore = [
     "PLC0415",
     "PLR2004",
 ]
+unfixable = ["PLW1510",]
+
 flake8-type-checking.runtime-evaluated-base-classes = ["pydantic.BaseModel","langchain_core.load.serializable.Serializable","langchain_core.runnables.base.RunnableSerializable"]
 flake8-annotations.allow-star-arg-any = true
 flake8-annotations.mypy-init-return = true
diff --git a/libs/core/tests/benchmarks/test_imports.py b/libs/core/tests/benchmarks/test_imports.py
index f3b509f0241..f8a06a6b9f0 100644
--- a/libs/core/tests/benchmarks/test_imports.py
+++ b/libs/core/tests/benchmarks/test_imports.py
@@ -51,4 +51,4 @@ from pytest_benchmark.fixture import BenchmarkFixture  # type: ignore[import-unt
 def test_import_time(benchmark: BenchmarkFixture, import_path: str) -> None:
     @benchmark  # type: ignore[misc]
     def import_in_subprocess() -> None:
-        subprocess.run([sys.executable, "-c", import_path], check=False)
+        subprocess.run([sys.executable, "-c", import_path], check=True)