diff --git a/libs/partners/openrouter/pyproject.toml b/libs/partners/openrouter/pyproject.toml
index d83d8b753be..63f4b1c4984 100644
--- a/libs/partners/openrouter/pyproject.toml
+++ b/libs/partners/openrouter/pyproject.toml
@@ -23,7 +23,7 @@ classifiers = [
 version = "0.0.2"
 requires-python = ">=3.10.0,<4.0.0"
 dependencies = [
-    "langchain-core>=1.2.11,<2.0.0",
+    "langchain-core>=1.2.13,<2.0.0",
     "openrouter>=0.6.0,<1.0.0",
 ]
 
@@ -91,6 +91,9 @@ markers = [
     "compile: mark placeholder test used to compile integration tests without running them",
 ]
 asyncio_mode = "auto"
+filterwarnings = [
+    "ignore:Unrecognized structured output method:UserWarning",
+]
 
 [tool.ruff.lint.extend-per-file-ignores]
 "tests/**/*.py" = [
diff --git a/libs/partners/openrouter/tests/unit_tests/test_chat_models.py b/libs/partners/openrouter/tests/unit_tests/test_chat_models.py
index 16c728028fb..e35bcf9f2dc 100644
--- a/libs/partners/openrouter/tests/unit_tests/test_chat_models.py
+++ b/libs/partners/openrouter/tests/unit_tests/test_chat_models.py
@@ -1109,7 +1109,8 @@ class TestMessageConversion:
     def test_dict_to_chat_message_unknown_role(self) -> None:
         """Test that unrecognized roles fall back to ChatMessage."""
         d = {"role": "developer", "content": "Some content"}
-        msg = _convert_dict_to_message(d)
+        with pytest.warns(UserWarning, match="Unrecognized message role"):
+            msg = _convert_dict_to_message(d)
         assert isinstance(msg, ChatMessage)
         assert msg.role == "developer"
         assert msg.content == "Some content"
@@ -1445,7 +1446,8 @@ class TestStreamingChunks:
         chunk: dict[str, Any] = {
             "choices": [{"delta": {"role": "developer", "content": "test"}}]
         }
-        msg = _convert_chunk_to_message_chunk(chunk, ChatMessageChunk)
+        with pytest.warns(UserWarning, match="Unrecognized streaming chunk role"):
+            msg = _convert_chunk_to_message_chunk(chunk, ChatMessageChunk)
         assert isinstance(msg, ChatMessageChunk)
 
     def test_chunk_with_usage(self) -> None: