diff --git a/test_deprecation_warnings.py b/test_deprecation_warnings.py
new file mode 100644
index 000000000..6d6102104
--- /dev/null
+++ b/test_deprecation_warnings.py
@@ -0,0 +1,86 @@
+#!/usr/bin/env python
+"""Test that deprecation warnings are properly emitted for InjectedState and InjectedStore."""
+
+import warnings
+from typing import Annotated
+from langchain_core.messages import AIMessage
+from langgraph.prebuilt import ToolNode, InjectedState, InjectedStore
+from langgraph.store.memory import InMemoryStore
+from langgraph.store.base import BaseStore
+
+
+def test_deprecation_warnings():
+    """Test that deprecation warnings are emitted for annotation-based injection."""
+    
+    # Define tools using deprecated annotations
+    def tool_with_injected_state(x: int, state: Annotated[dict, InjectedState]) -> str:
+        """Tool using deprecated InjectedState annotation."""
+        return f"state: {state.get('foo', 'none')}"
+    
+    def tool_with_injected_store(x: int, store: Annotated[BaseStore, InjectedStore()]) -> str:
+        """Tool using deprecated InjectedStore annotation."""
+        return "has store"
+    
+    # Define tools using new reserved keywords (should not trigger warnings)
+    def tool_with_reserved_state(x: int, state) -> str:
+        """Tool using reserved keyword 'state'."""
+        return f"state: {state.get('foo', 'none')}"
+    
+    def tool_with_reserved_runtime(x: int, runtime) -> str:
+        """Tool using reserved keyword 'runtime'."""
+        return "has runtime"
+    
+    print("Testing deprecation warnings...")
+    
+    # Capture warnings
+    with warnings.catch_warnings(record=True) as w:
+        warnings.simplefilter("always")
+        
+        # Create ToolNode with deprecated annotation tools
+        print("\n1. Creating ToolNode with deprecated annotation tools...")
+        node1 = ToolNode([tool_with_injected_state, tool_with_injected_store])
+        
+        # Check that warnings were emitted
+        assert len(w) == 2, f"Expected 2 warnings, got {len(w)}"
+        
+        # Check warning messages
+        warning_messages = [str(warning.message) for warning in w]
+        assert any("InjectedState" in msg for msg in warning_messages), "Missing InjectedState warning"
+        assert any("InjectedStore" in msg for msg in warning_messages), "Missing InjectedStore warning"
+        
+        print(f"   ✓ Emitted {len(w)} deprecation warnings for annotation-based tools")
+        for warning in w:
+            print(f"     - {warning.message}")
+    
+    # Test that reserved keywords don't trigger warnings
+    with warnings.catch_warnings(record=True) as w:
+        warnings.simplefilter("always")
+        
+        print("\n2. Creating ToolNode with reserved keyword tools...")
+        node2 = ToolNode([tool_with_reserved_state, tool_with_reserved_runtime])
+        
+        # Check that no warnings were emitted
+        assert len(w) == 0, f"Expected 0 warnings for reserved keywords, got {len(w)}"
+        print(f"   ✓ No warnings emitted for reserved keyword tools")
+    
+    # Test mixed usage
+    with warnings.catch_warnings(record=True) as w:
+        warnings.simplefilter("always")
+        
+        print("\n3. Creating ToolNode with mixed tools...")
+        node3 = ToolNode([
+            tool_with_injected_state,  # Should warn
+            tool_with_reserved_state,  # Should not warn
+            tool_with_injected_store,  # Should warn
+            tool_with_reserved_runtime  # Should not warn
+        ])
+        
+        # Check that only 2 warnings were emitted (for the annotation-based tools)
+        assert len(w) == 2, f"Expected 2 warnings for mixed tools, got {len(w)}"
+        print(f"   ✓ Emitted {len(w)} warnings for annotation-based tools only")
+    
+    print("\n✅ All deprecation warning tests passed!")
+
+
+if __name__ == "__main__":
+    test_deprecation_warnings()