return ModelDefaults(x=None, y="y")


@app.get(
    "/exclude_unset_none",
    response_model=ModelDefaults,
    response_model_exclude_unset=True,
    response_model_exclude_none=True,
)
def get_exclude_unset_none() -> ModelDefaults:
    return ModelDefaults(x=None, y="y")


client = TestClient(app)


def test_return_defaults():
    response = client.get("/")
    assert response.json() == {"sub": {}}