Major chocolate companies such as Godiva, Lindt and Hershey are failing to keep child labor out of their supply chains, according to a new ranking by activists released Thursday.

Godiva was rated the worst, followed by Ferrero and Mondalez on a scorecard of efforts to reduce child labor and deforestation published by the activist group Green America.

Mars and Nestle were rated slightly better than Lindt and Hershey, while seven smaller companies received the best grade, including Alter Eco, Divine and Tony's Chocolonely.