{
                "item_id": "foo",
                "owner_id": 123,
                "description": "This is an amazing item that has a long description",
            },
        ),
        (
            "/users/1/items/bar?q=somequery",
            {
                "item_id": "bar",
                "owner_id": 1,
                "q": "somequery",

For example, if you have an app like this:

```Python
from fastapi import FastAPI
from pydantic import BaseModel

class Item(BaseModel):
    name: str
    price: Optional[float] = None
    owner_ids: Optional[List[int]] = None

app = FastAPI()

@app.get("/items/invalidnone", response_model=Item)
def get_invalid_none():
    return None
```