diff --git a/libs/core/langchain_core/language_models/base.py b/libs/core/langchain_core/language_models/base.py
index cfa2b4fe34f91..d01247991a68e 100644
--- a/libs/core/langchain_core/language_models/base.py
+++ b/libs/core/langchain_core/language_models/base.py
@@ -61,8 +61,7 @@ def _get_token_ids_default_method(text: str) -> List[int]:
 
 
 class BaseLanguageModel(
-    RunnableSerializable[LanguageModelInput, LanguageModelOutputVar],
-    ABC,
+    RunnableSerializable[LanguageModelInput, LanguageModelOutputVar], ABC
 ):
     """Abstract base class for interfacing with language models.
 
diff --git a/libs/core/langchain_core/language_models/chat_models.py b/libs/core/langchain_core/language_models/chat_models.py
index 29abfc9bc3d13..6279116093e5f 100644
--- a/libs/core/langchain_core/language_models/chat_models.py
+++ b/libs/core/langchain_core/language_models/chat_models.py
@@ -26,10 +26,7 @@
     Callbacks,
 )
 from langchain_core.globals import get_llm_cache
-from langchain_core.language_models.base import (
-    BaseLanguageModel,
-    LanguageModelInput,
-)
+from langchain_core.language_models.base import BaseLanguageModel, LanguageModelInput
 from langchain_core.load import dumpd, dumps
 from langchain_core.messages import (
     AIMessage,
diff --git a/libs/core/langchain_core/language_models/llms.py b/libs/core/langchain_core/language_models/llms.py
index 22c9f4d05e69a..36d9435325146 100644
--- a/libs/core/langchain_core/language_models/llms.py
+++ b/libs/core/langchain_core/language_models/llms.py
@@ -46,10 +46,7 @@
     Callbacks,
 )
 from langchain_core.globals import get_llm_cache
-from langchain_core.language_models.base import (
-    BaseLanguageModel,
-    LanguageModelInput,
-)
+from langchain_core.language_models.base import BaseLanguageModel, LanguageModelInput
 from langchain_core.load import dumpd
 from langchain_core.messages import (
     AIMessage,