diff --git a/.github/scripts/check_diff.py b/.github/scripts/check_diff.py
index a8d4d24d93e..5b03c7550e9 100644
--- a/.github/scripts/check_diff.py
+++ b/.github/scripts/check_diff.py
@@ -280,8 +280,6 @@ if __name__ == "__main__":
             # Note: won't run on external repo partners
             dirs_to_run["lint"].add("libs/standard-tests")
             dirs_to_run["test"].add("libs/standard-tests")
-            dirs_to_run["lint"].add("libs/cli")
-            dirs_to_run["test"].add("libs/cli")
             dirs_to_run["test"].add("libs/partners/mistralai")
             dirs_to_run["test"].add("libs/partners/openai")
             dirs_to_run["test"].add("libs/partners/anthropic")
diff --git a/libs/standard-tests/langchain_tests/integration_tests/chat_models.py b/libs/standard-tests/langchain_tests/integration_tests/chat_models.py
index 6a120ec3685..c65ca1ffc24 100644
--- a/libs/standard-tests/langchain_tests/integration_tests/chat_models.py
+++ b/libs/standard-tests/langchain_tests/integration_tests/chat_models.py
@@ -779,6 +779,7 @@ class ChatModelIntegrationTests(ChatModelTests):
         assert isinstance(result.text, str)
         assert len(result.content) > 0
 
+    @pytest.mark.parametrize("model", [{}, {"output_version": "v1"}], indirect=True)
     def test_stream(self, model: BaseChatModel) -> None:
         """Test to verify that ``model.stream(simple_message)`` works.
 
@@ -804,13 +805,20 @@ class ChatModelIntegrationTests(ChatModelTests):
 
         """
         num_chunks = 0
+        full: AIMessageChunk | None = None
         for chunk in model.stream("Hello"):
             assert chunk is not None
             assert isinstance(chunk, AIMessageChunk)
             assert isinstance(chunk.content, str | list)
             num_chunks += 1
+            full = chunk if full is None else full + chunk
         assert num_chunks > 0
+        assert isinstance(full, AIMessageChunk)
+        assert full.content
+        assert len(full.content_blocks) == 1
+        assert full.content_blocks[0]["type"] == "text"
 
+    @pytest.mark.parametrize("model", [{}, {"output_version": "v1"}], indirect=True)
     async def test_astream(self, model: BaseChatModel) -> None:
         """Test to verify that ``await model.astream(simple_message)`` works.
 
@@ -839,12 +847,18 @@ class ChatModelIntegrationTests(ChatModelTests):
 
         """
         num_chunks = 0
+        full: AIMessageChunk | None = None
         async for chunk in model.astream("Hello"):
             assert chunk is not None
             assert isinstance(chunk, AIMessageChunk)
             assert isinstance(chunk.content, str | list)
             num_chunks += 1
+            full = chunk if full is None else full + chunk
         assert num_chunks > 0
+        assert isinstance(full, AIMessageChunk)
+        assert full.content
+        assert len(full.content_blocks) == 1
+        assert full.content_blocks[0]["type"] == "text"
 
     def test_batch(self, model: BaseChatModel) -> None:
         """Test to verify that ``model.batch([messages])`` works.
@@ -3007,6 +3021,7 @@ class ChatModelIntegrationTests(ChatModelTests):
         assert isinstance(result.text, str)
         assert len(result.content) > 0
 
+    @pytest.mark.parametrize("model", [{}, {"output_version": "v1"}], indirect=True)
     def test_agent_loop(self, model: BaseChatModel) -> None:
         """Test that the model supports a simple ReAct agent loop.
 
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 d0594bdfa71..d5298e73428 100644
--- a/libs/standard-tests/langchain_tests/unit_tests/chat_models.py
+++ b/libs/standard-tests/langchain_tests/unit_tests/chat_models.py
@@ -83,13 +83,15 @@ class ChatModelTests(BaseStandardTests):
         }
 
     @pytest.fixture
-    def model(self) -> BaseChatModel:
+    def model(self, request: Any) -> BaseChatModel:
         """Model fixture."""
+        extra_init_params = getattr(request, "param", None) or {}
         return self.chat_model_class(
             **{
                 **self.standard_chat_model_params,
                 **self.chat_model_params,
-            }
+            },
+            **extra_init_params,
         )
 
     @pytest.fixture