Walmart will start with tests of grocery delivery through Uber and Lyft in Denver and one other market. This is in addition to a quiet Sam’s Club pilot that started in March with Deliv involving delivery of general merchandise and grocery for business members in Miami.

A customer will places a grocery order online and select a delivery window. Walmart workers select and prepare the order. Then, the Walmart team requests a driver from one of these services to come to the store, to pick up the customer’s order, and to take it directly to the customer’s location.

The customer pays the normal $7-10 delivery charge online, and makes no payment to the driver. Walmart will notify the customer that the order is being delivered by a driver from Uber or Lyft.

At Sam’s Club, the process is very similar, with personal shoppers preparing the orders for business members, and having their order delivered with Deliv.