diff --git a/libs/core/langchain_core/runnables/passthrough.py b/libs/core/langchain_core/runnables/passthrough.py
index 37d97fb968..4e04b37a0d 100644
--- a/libs/core/langchain_core/runnables/passthrough.py
+++ b/libs/core/langchain_core/runnables/passthrough.py
@@ -62,7 +62,11 @@ class RunnablePassthrough(RunnableSerializable[Other, Other]):
 
         .. code-block:: python
 
-            from langchain_core.runnables import RunnablePassthrough, RunnableParallel
+            from langchain_core.runnables import (
+                RunnableLambda,
+                RunnableParallel,
+                RunnablePassthrough,
+            )
 
             runnable = RunnableParallel(
                 origin=RunnablePassthrough(),
@@ -72,7 +76,7 @@ class RunnablePassthrough(RunnableSerializable[Other, Other]):
             runnable.invoke(1) # {'origin': 1, 'modified': 2}
 
 
-             def fake_llm(prompt: str) -> str: # Fake LLM for the example
+            def fake_llm(prompt: str) -> str: # Fake LLM for the example
                 return "completion"
 
             chain = RunnableLambda(fake_llm) | {
@@ -89,7 +93,7 @@ class RunnablePassthrough(RunnableSerializable[Other, Other]):
 
             from langchain_core.runnables import RunnablePassthrough, RunnableParallel
 
-             def fake_llm(prompt: str) -> str: # Fake LLM for the example
+            def fake_llm(prompt: str) -> str: # Fake LLM for the example
                 return "completion"
 
             runnable = {