Amazon is set to test its cashier-less checkouts in bigger stores, according to the latest report.
The firm is already testing the Amazon Go system in small convenience stores which are less than 2,500 square feet (232 square metres) large in Seattle, San Francisco and Chicago.
However, reports suggest the firm would like to start implementing the checkout-free system in Whole Foods stores, which are typically 40,000 square feet (3,700 square metres) large.
In September it was revealed Amazon was looking to open 3,000 of its cashier-less stores by 2021.