return items


@app.get("/header-json-list")
def header_json_list(x_items: Annotated[Json[list[str]], Header()]) -> list[str]:
    return x_items


@app.get("/cookie-json-list")
def cookie_json_list(items: Annotated[Json[list[str]], Cookie()]) -> list[str]:
    return items


client = TestClient(app)


def test_form_json_list():
    response = client.post(