Testament is an American thrash metal band from Berkeley, California. Formed in 1983 under the name Legacy, the band consists of vocalist Chuck Billy, guitarists Eric Peterson and Alex Skolnick, bassist Steve DiGiorgio and drummer Gene Hoglan.
In the 33 years since its inception, Testament has had numerous lineup changes, and Peterson has been the only constant member.

Testament is often credited as one of the most popular bands of the thrash metal scene, having sold over 1.4 million albums in the United States since the beginning of the SoundScan era and 14 million albums worldwide.