A new joint venture between Uber’s Serve Robotics sidewalk delivery drones and Alphabet’s Wing flying drone service will do a dual test run. Both tech companies hope that flying and sidewalk drones can cover areas its counterpart can’t and speed up delivery times.

The on-demand platform will transport customers' tricks or treats from the specialty retailer’s 1,525 pop-up shops across the U.S. and Canada.

In the coming months, select Wing deliveries will be picked up by a Serve robot from a restaurant curbside and delivered to a Wing drone AutoLoader a few blocks away for aerial delivery to customers.