Formed in 1993 in Essen, Germany, by and as a side project to The Fair Sex, TESTIFY stormed onto the aggro-metal scene touring with the likes of and . The band lineup includes Myk Jung, , and .
The EP "Ballroom Killer" was produced by engineers and Keith "Fluffy" Auerbach. The album "Mmmyaoooo" was produced by of . Remix contributors over the years include members of Die Krupps, and .
The music video for the song 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).