callbacks=callback_router1.routes,
)

app.include_router(router2_override)

app.include_router(router2_default)

client = TestClient(app)


def test_level1_override():
    response = client.get("/override1?level1=foo")
    assert response.json() == "foo"
    assert response.headers["content-type"] == "application/x-level-1"
    assert "x-level0" in response.headers