The Handmaid's Tale spinoff The Testaments went through some major changes - specifically when it comes to the cast. Based on Margaret Atwood's novel of the same name, The Testaments is a sequel to The Handmaid's Tale, which aired from 2017 to 2025 and takes place in a dystopian future where low fertility rates lead women to be assigned to men for the purpose of bearing children. The Testaments, published in 2019, is set 15 years after the events of The Handmaid's Tale.