Simon Property Group, the largest U.S. mall operator, is leasing space to a COVID-19 testing lab operator at four Dallas-Fort Worth shopping centers and several others in Austin, Houston and San Marcos. Outdoor testing kiosks under the brand Collection Sites will open by early February at Allen Premium Outlets, Grapevine Mills and North East Mall in Hurst. A testing site will open at Firewheel Town Center in Garland, another Simon-owned center, soon after. The labs are operated by Medivolve, formerly QuestCap, a Canada-based company that recently changed its name as it emphasized a focus on medical services and technology.