new_contents: from typing import List
  
  import pytest
  from fastapi import FastAPI
  from pydantic import BaseModel, ValidationError
  from starlette.testclient import TestClient
  
  app = FastAPI()
  
  
  class Item(BaseModel):
      name: str
      price: float = None
      owner_ids: List[int] = None
  
  
  @app.get("/items/invalid", response_model=Item)
  def get_invalid():
      return {"name": "invalid", "price": "foo"}
  
  
  @app.get("/items/innerinvalid", response_model=Item)
  def get_innerinvalid():
      return {"name": "double invalid", "price": "foo", "owner_ids": ["foo", "bar"]}
  
  
  @app.get("/items/invalidlist", response_model=List[Item])
  def get_invalidlist():
      return [
          {"name": "foo"},
          {"name": "bar", "price": "bar"},
          {"name": "baz", "price": "baz"},
      ]
  
  
  client = TestClient(app)
  
  
  def test_invalid():
      with pytest.raises(ValidationError):
          client.get("/items/invalid")
  
  
  def test_double_invalid():
      with pytest.raises(ValidationError):
          client.get("/items/innerinvalid")
  
  
  def test_invalid_list():
      with pytest.raises(ValidationError):
          client.get("/items/invalidlist")
  
subject: Add tests for validation errors in response