diff --git a/libs/standard-tests/langchain_tests/unit_tests/chat_models.py b/libs/standard-tests/langchain_tests/unit_tests/chat_models.py
index 6466c8974fe..b6c7e27e0f4 100644
--- a/libs/standard-tests/langchain_tests/unit_tests/chat_models.py
+++ b/libs/standard-tests/langchain_tests/unit_tests/chat_models.py
@@ -837,8 +837,8 @@ class ChatModelUnitTests(ChatModelTests):
         assert model is not None
 
     def test_model_param_name(self) -> None:
-        """Tests model initialization with a ``model=`` parameter. This should pass for all
-        integrations.
+        """Tests model initialization with a ``model=`` parameter. This should pass for
+        all integrations.
 
         .. dropdown:: Troubleshooting
 
@@ -851,7 +851,7 @@ class ChatModelUnitTests(ChatModelTests):
             ``model_config`` class attribute to your model class:
 
             .. code-block:: python
-            
+
                 class MyChatModel(BaseChatModel):
                     model: str = Field(alias="model_name")
                     model_config = ConfigDict(populate_by_name=True)
@@ -873,7 +873,7 @@ class ChatModelUnitTests(ChatModelTests):
 
         model = self.chat_model_class(**params)
         assert model is not None
-        assert model.model == params["model"]
+        assert model.model == params["model"]  # type: ignore[attr-defined]
 
     def test_init_from_env(self) -> None:
         """Test initialization from environment variables. Relies on the
diff --git a/libs/standard-tests/tests/unit_tests/custom_chat_model.py b/libs/standard-tests/tests/unit_tests/custom_chat_model.py
index fb1a6f0d597..3a9475a60ef 100644
--- a/libs/standard-tests/tests/unit_tests/custom_chat_model.py
+++ b/libs/standard-tests/tests/unit_tests/custom_chat_model.py
@@ -81,7 +81,7 @@ class ChatParrotLink(BaseChatModel):
             additional_kwargs={},  # Used to add additional payload to the message
             response_metadata={  # Use for response metadata
                 "time_in_seconds": 3,
-                "model_name": self.model_name,
+                "model_name": self.model,
             },
             usage_metadata={
                 "input_tokens": ct_input_tokens,
@@ -146,7 +146,7 @@ class ChatParrotLink(BaseChatModel):
         chunk = ChatGenerationChunk(
             message=AIMessageChunk(
                 content="",
-                response_metadata={"time_in_sec": 3, "model_name": self.model_name},
+                response_metadata={"time_in_sec": 3, "model_name": self.model},
             )
         )
         if run_manager: