test(partners): account for warning behavior in partner tests (#38046)

Partner unit tests now reflect the warning behavior emitted by updated
`langchain-core` serialization and model initialization paths.
Warning-strict runs can stay focused on the behavior under test rather
than expected framework warnings.

libs/partners/openrouter/tests/unit_tests/test_chat_models.py

@@ -492,6 +492,7 @@ class TestSerialization:
         """Test that ChatOpenRouter declares itself as serializable."""
         assert ChatOpenRouter.is_lc_serializable() is True
 
+    @pytest.mark.filterwarnings("ignore:The function `load` is in beta")
     def test_dumpd_load_roundtrip(self) -> None:
         """Test that dumpd/load round-trip preserves model config."""
         model = _make_model(temperature=0.7, max_tokens=100)

libs/partners/openrouter/uv.lock

@@ -346,7 +346,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.4.2"
+version = "1.4.4"
 source = { editable = "../../core" }
 dependencies = [
     { name = "jsonpatch" },

libs/partners/xai/tests/unit_tests/test_chat_models.py

@@ -48,12 +48,14 @@ def test_chat_xai_invalid_streaming_params() -> None:
 def test_chat_xai_extra_kwargs() -> None:
     """Test extra kwargs to chat xai."""
     # Check that foo is saved in extra_kwargs.
-    llm = ChatXAI(model=MODEL_NAME, foo=3, max_tokens=10)  # type: ignore[call-arg]
+    with pytest.warns(UserWarning, match="foo is not default parameter"):
+        llm = ChatXAI(model=MODEL_NAME, foo=3, max_tokens=10)  # type: ignore[call-arg]
     assert llm.max_tokens == 10
     assert llm.model_kwargs == {"foo": 3}
 
     # Test that if extra_kwargs are provided, they are added to it.
-    llm = ChatXAI(model=MODEL_NAME, foo=3, model_kwargs={"bar": 2})  # type: ignore[call-arg]
+    with pytest.warns(UserWarning, match="foo is not default parameter"):
+        llm = ChatXAI(model=MODEL_NAME, foo=3, model_kwargs={"bar": 2})  # type: ignore[call-arg]
     assert llm.model_kwargs == {"foo": 3, "bar": 2}
 
     # Test that if provided twice it errors

libs/partners/xai/uv.lock

@@ -679,7 +679,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.4.2"
+version = "1.4.4"
 source = { editable = "../../core" }
 dependencies = [
     { name = "jsonpatch" },