Formed in 1993 in Essen, Germany, by Myk Jung and Rascal Nikov as a side project to The Fair Sex, TESTIFY stormed onto the aggro-metal scene touring with the likes of Die Krupps and Armageddon Dildos. The band lineup includes Myk Jung, Mathias Black, Moses W. and Ulf H..

The album Ballroom Killer was produced by Ministry Engineers Howie Beno and Keith Fluffy Auerbach. The album Mmmyaoooo was produced by Adam Grossman of Skrew. Remix contributors over the years include members of Die Krupps, Die Warzau, and Plastic Noise Experience.

The music video A.N.G.E.R. was featured on MTV. The Seed of Wrath (Die Warzau silence as a weapon mix) animated music video was produced by Will Young (Tool animated music video contest runner up).