An Amazon Flex signPhoto by Artur Widak/NurPhoto via Getty Images Amazon is testing a program that involves Flex drivers making deliveries from mall retailers, Bloomberg and CNBC reported Friday. The trail is expected to run in Chandler, Arizona; Las Vegas, Nevada; and Tysons Corner, Virginia. A spokesperson told CNBC participating retailers include a handful of "existing Amazon sellers." Amazon is experimenting with expanding its driver services to make deliveries from mall retailers, according to Bloomberg.The outlet was first to report the news Friday that the e-commerce giant is testing a program that allows retailers to tap Amazon's massive logistics network to get products into customer homes quicker.