This week, 40 Walmart Supercenters will begin testing the closing of their stores at midnight and reopening at 6 a.m., as the retailer looks for ways to optimize store labor in accordance with peak shopping periods. These 40 stories are a working list in addition to about two dozen other supercenters that began testing the overnight closures this spring. More stores are expected to join the pilot in the coming months.

Closing in the overnight hours, will allow store managers to reallocate resources that should lead to better in-stock, cleaner and more organized stores to better serve shoppers during open hours. The new management inside Walmart U.S. has made it clear that they intend to clean up stores, improve customer service and in-stocks and reallocate the store labor as it is needed.