diff --git a/test_timeout_implementation.py b/test_timeout_implementation.py
new file mode 100644
index 00000000000..65ca8868919
--- /dev/null
+++ b/test_timeout_implementation.py
@@ -0,0 +1,193 @@
+#!/usr/bin/env python3
+"""Simple test script to verify ToolNode timeout implementation works correctly."""
+
+import asyncio
+import sys
+import os
+
+# Add the langchain_v1 directory to the path
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'libs', 'langchain_v1'))
+
+from langchain.agents import ToolNode
+from langchain_core.tools import tool
+from langchain_core.messages import AIMessage
+
+
+@tool
+async def slow_tool(duration: float) -> str:
+    """A tool that simulates a slow operation."""
+    await asyncio.sleep(duration)
+    return f"Completed after {duration} seconds"
+
+
+@tool
+async def fast_tool(message: str) -> str:
+    """A tool that completes quickly."""
+    await asyncio.sleep(0.1)
+    return f"Processed: {message}"
+
+
+async def test_timeout_triggers():
+    """Test that timeout is triggered when tool takes too long."""
+    print("Test 1: Testing timeout triggers...")
+    tool_node = ToolNode([slow_tool], timeout=0.5)
+    
+    try:
+        await tool_node.ainvoke({
+            "messages": [
+                AIMessage(
+                    "Testing timeout",
+                    tool_calls=[{
+                        "name": "slow_tool",
+                        "args": {"duration": 1.0},
+                        "id": "test_timeout",
+                    }],
+                )
+            ]
+        })
+        print("❌ Test 1 FAILED: Expected TimeoutError but none was raised")
+        return False
+    except asyncio.TimeoutError as e:
+        if "Tool execution timed out after 0.5 seconds" in str(e) and "slow_tool" in str(e):
+            print(f"✅ Test 1 PASSED: Timeout triggered correctly with message: {e}")
+            return True
+        else:
+            print(f"❌ Test 1 FAILED: Timeout message incorrect: {e}")
+            return False
+    except Exception as e:
+        print(f"❌ Test 1 FAILED: Unexpected error: {e}")
+        return False
+
+
+async def test_no_timeout_backward_compatibility():
+    """Test that ToolNode works without timeout (backward compatibility)."""
+    print("\nTest 2: Testing backward compatibility (no timeout)...")
+    tool_node = ToolNode([fast_tool])
+    
+    try:
+        result = await tool_node.ainvoke({
+            "messages": [
+                AIMessage(
+                    "Test",
+                    tool_calls=[{
+                        "name": "fast_tool",
+                        "args": {"message": "Hello"},
+                        "id": "1",
+                    }],
+                )
+            ]
+        })
+        
+        if result["messages"][0].content == "Processed: Hello":
+            print("✅ Test 2 PASSED: Tool executed successfully without timeout")
+            return True
+        else:
+            print(f"❌ Test 2 FAILED: Unexpected result: {result}")
+            return False
+    except Exception as e:
+        print(f"❌ Test 2 FAILED: Unexpected error: {e}")
+        return False
+
+
+async def test_successful_completion_within_timeout():
+    """Test that tools complete successfully when within timeout."""
+    print("\nTest 3: Testing successful completion within timeout...")
+    tool_node = ToolNode([fast_tool], timeout=1.0)
+    
+    try:
+        result = await tool_node.ainvoke({
+            "messages": [
+                AIMessage(
+                    "Test",
+                    tool_calls=[{
+                        "name": "fast_tool",
+                        "args": {"message": "Quick task"},
+                        "id": "1",
+                    }],
+                )
+            ]
+        })
+        
+        if "Processed: Quick task" in result["messages"][0].content:
+            print("✅ Test 3 PASSED: Tool completed successfully within timeout")
+            return True
+        else:
+            print(f"❌ Test 3 FAILED: Unexpected result: {result}")
+            return False
+    except Exception as e:
+        print(f"❌ Test 3 FAILED: Unexpected error: {e}")
+        return False
+
+
+async def test_multiple_tools_timeout():
+    """Test timeout with multiple tools running in parallel."""
+    print("\nTest 4: Testing timeout with multiple tools in parallel...")
+    tool_node = ToolNode([fast_tool, slow_tool], timeout=0.3)
+    
+    try:
+        await tool_node.ainvoke({
+            "messages": [
+                AIMessage(
+                    "Test parallel",
+                    tool_calls=[
+                        {
+                            "name": "fast_tool",
+                            "args": {"message": "Fast 1"},
+                            "id": "fast_1",
+                        },
+                        {
+                            "name": "slow_tool",
+                            "args": {"duration": 1.0},
+                            "id": "slow_1",
+                        },
+                    ],
+                )
+            ]
+        })
+        print("❌ Test 4 FAILED: Expected TimeoutError but none was raised")
+        return False
+    except asyncio.TimeoutError as e:
+        error_msg = str(e)
+        if "Tool execution timed out" in error_msg and "fast_tool" in error_msg and "slow_tool" in error_msg:
+            print(f"✅ Test 4 PASSED: Timeout triggered with multiple tools: {e}")
+            return True
+        else:
+            print(f"❌ Test 4 FAILED: Timeout message incorrect: {e}")
+            return False
+    except Exception as e:
+        print(f"❌ Test 4 FAILED: Unexpected error: {e}")
+        return False
+
+
+async def main():
+    """Run all tests."""
+    print("=" * 60)
+    print("Testing ToolNode Timeout Implementation")
+    print("=" * 60)
+    
+    results = []
+    
+    # Run all tests
+    results.append(await test_timeout_triggers())
+    results.append(await test_no_timeout_backward_compatibility())
+    results.append(await test_successful_completion_within_timeout())
+    results.append(await test_multiple_tools_timeout())
+    
+    print("\n" + "=" * 60)
+    print("Test Summary:")
+    print("=" * 60)
+    
+    passed = sum(results)
+    total = len(results)
+    
+    if passed == total:
+        print(f"✅ All {total} tests PASSED!")
+        return 0
+    else:
+        print(f"❌ {total - passed} out of {total} tests FAILED")
+        return 1
+
+
+if __name__ == "__main__":
+    exit_code = asyncio.run(main())
+    sys.exit(exit_code)