From 22cee5d983322d916382b5b426afbe9644bbc3d9 Mon Sep 17 00:00:00 2001
From: Eugene Yurtsev <eyurtsev@gmail.com>
Date: Fri, 28 Mar 2025 13:56:10 -0400
Subject: [PATCH] x

---
 libs/core/langchain_core/tools/base.py   |  3 ++-
 libs/core/tests/unit_tests/test_tools.py | 10 +++++-----
 libs/core/uv.lock                        |  2 +-
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/libs/core/langchain_core/tools/base.py b/libs/core/langchain_core/tools/base.py
index 0148528a7fd..7915bbb263f 100644
--- a/libs/core/langchain_core/tools/base.py
+++ b/libs/core/langchain_core/tools/base.py
@@ -659,7 +659,8 @@ class ChildTool(BaseTool):
             return (), tool_input.copy()
         else:
             # This code path is not expected to be reachable.
-            raise TypeError(f"Invalid tool input type: {type(tool_input)}")
+            msg = f"Invalid tool input type: {type(tool_input)}"
+            raise TypeError(msg)
 
     def run(
         self,
diff --git a/libs/core/tests/unit_tests/test_tools.py b/libs/core/tests/unit_tests/test_tools.py
index c253d24271a..80d7ad7d7b9 100644
--- a/libs/core/tests/unit_tests/test_tools.py
+++ b/libs/core/tests/unit_tests/test_tools.py
@@ -2,16 +2,12 @@
 
 import inspect
 import json
-import pytest
 import sys
 import textwrap
 import threading
 from datetime import datetime
 from enum import Enum
 from functools import partial
-from pydantic import BaseModel, Field, ValidationError
-from pydantic.v1 import BaseModel as BaseModelV1
-from pydantic.v1 import ValidationError as ValidationErrorV1
 from typing import (
     Annotated,
     Any,
@@ -23,6 +19,11 @@ from typing import (
     Union,
     cast,
 )
+
+import pytest
+from pydantic import BaseModel, Field, ValidationError
+from pydantic.v1 import BaseModel as BaseModelV1
+from pydantic.v1 import ValidationError as ValidationErrorV1
 from typing_extensions import TypedDict
 
 from langchain_core import tools
@@ -2690,4 +2691,3 @@ def test_tool_invoke_does_not_mutate_inputs() -> None:
         "id": "call_0_82c17db8-95df-452f-a4c2-03f809022134",
         "type": "tool_call",
     }
-
diff --git a/libs/core/uv.lock b/libs/core/uv.lock
index 8674c8fec59..794dc64029e 100644
--- a/libs/core/uv.lock
+++ b/libs/core/uv.lock
@@ -1027,7 +1027,7 @@ typing = [
 
 [[package]]
 name = "langchain-tests"
-version = "0.3.15"
+version = "0.3.16"
 source = { directory = "../standard-tests" }
 dependencies = [
     { name = "httpx" },