A consumer advocacy group is suing Starbucks, the world’s largest coffee brand, for false advertising, alleging that it sources coffee and tea from farms with human rights and labor abuses, while touting its commitment to ethical sourcing.

The case, filed in a Washington, D.C., court on behalf of American consumers, alleges that the coffee giant is misleading the public by widely marketing its “100% ethical” sourcing commitment on its coffee and tea products, when it knowingly sources from suppliers with “documented, severe human rights and labor abuses.”