Amazon’s unbelievably quick turnaround times on deliveries have become a given for many people in the U.S. Order a bottle of mouthwash on a weekday morning and your breath will be minty fresh within a day or even just a few hours. 

But the success of the e-commerce giant’s rapid-fire delivery model depends on what happens inside Amazon’s “fulfillment centers” — sprawling warehouses where workers sort and pack orders for shipment, all under the watchful eye of technical systems that track their every move. For years, workers have said that the company’s algorithmically-driven approach pushes them to the brink, treating them “like robots” in the service of meeting unattainable productivity quotes and driving up injuries in the process.

On May 16, lawmakers in Minnesota passed a pioneering workplace safety bill that could improve labor conditions for Amazon employees subjected to the company’s worker tracking system. Organizers behind the legislation say it will provide the strongest labor protections in the nation for people working in warehouses like Amazon’s.

Work in Amazon warehouses is overseen entirely by technology: Algorithms track workers’ speed and productivity, measure the so-called “time off task” that employees spend logged out of their workstations and alert managers when workers don’t meet their productivity quotas. Mohamed Farah, a 50-year-old Amazon employee who came to the U.S. in the mid-1990s as a refugee from Somalia, works a 10-hour shift packaging items for shipment at a Minnesota warehouse. He said the company’s grueling pace of work and “time off task” rules have worn on workers’ bodies and minds, including his own. “They say you have to pack a minimum of 80 boxes per hour, but you cannot do it,” he told me. “If you try to pack 80 per hour, you cannot go to the bathroom. If you go to the bathroom, the rate is down.”