"Testify" was crafted over a two-year period at Collins' home in Switzerland, and was recorded in France and Los Angeles. Most of the album's twelve tracks are derived from demos Collins made in his bedroom studio and finished off with the help of producers Rob Cavallo and James Sanger, engineer Allen Sides, guitarist Tim Pierce, and bassist Paul Bushnell. Collins worked extensively with computers during production, work that can be seen throughout the album. After Collins made "Dance into the Light" without any drum machine, he returned to the device for "Testify".