TikTok is cracking down on remote work, telling some U.S. workers they could lose their jobs unless they show they have already moved near their assigned offices.

Last week, TikTok informed some employees over its internal software, Lark, that they may face disciplinary action—including job termination—because their home address doesn’t match their assigned office location, according to a message reviewed by The Information. The warning adds to a growing backlash against remote work. In recent months, companies including Snap and Twitter have severely restricted their employees’ remote work options as demand for online services has slowed after the pandemic-fueled spike.