diff --git a/docs_src/path_operation_configuration/tutorial004_py310.py b/docs_src/path_operation_configuration/tutorial004_py310.py
index 4cb8bdd43..44404aa08 100644
--- a/docs_src/path_operation_configuration/tutorial004_py310.py
+++ b/docs_src/path_operation_configuration/tutorial004_py310.py
@@ -12,8 +12,8 @@ class Item(BaseModel):
     tags: set[str] = set()
 
 
-@app.post("/items/", response_model=Item, summary="Create an item")
-async def create_item(item: Item):
+@app.post("/items/", summary="Create an item")
+async def create_item(item: Item) -> Item:
     """
     Create an item with all the information:
 
diff --git a/docs_src/path_operation_configuration/tutorial004_py39.py b/docs_src/path_operation_configuration/tutorial004_py39.py
index fc25680c5..31dfbff1d 100644
--- a/docs_src/path_operation_configuration/tutorial004_py39.py
+++ b/docs_src/path_operation_configuration/tutorial004_py39.py
@@ -14,8 +14,8 @@ class Item(BaseModel):
     tags: set[str] = set()
 
 
-@app.post("/items/", response_model=Item, summary="Create an item")
-async def create_item(item: Item):
+@app.post("/items/", summary="Create an item")
+async def create_item(item: Item) -> Item:
     """
     Create an item with all the information: