Testament is an American thrash metal band from Berkeley, California. Formed in 1983 under the name Legacy, the band's current lineup comprises guitarists Eric Peterson and Alex Skolnick, lead vocalist Chuck Billy, drummer Gene Hoglan, and bassist Steve Di Giorgio. Testament has experienced many lineup changes over the years, with Peterson being the only remaining original member, though they have since been rejoined by one of its co-founders Skolnick, who was out of the band from 1992 to 2005. Billy replaced original singer Steve "Zetro" Souza (who left the band to join Exodus as the replacement of Paul Baloff) in 1986, prior to the recording of their first studio album, The Legacy, and has been a member of the band since. He and Peterson are the only members to appear on all of Testament's studio albums. Testament is often credited as one of the most popular and influential bands of the thrash metal scene, as well as one of the leaders of the second wave of the genre in the late 1980s. They have also been referred to as one of the "big eight" of thrash metal, along with Metallica, Megadeth, Slayer, Anthrax, Exodus, Overkill and Death Angel. The band has sold over 1.4 million albums in the United States since the beginning of the SoundScan era and over 14 million copies worldwide. To date, Testament has released thirteen studio albums (one of which is a collection of re-recorded songs), four live albums, five compilation albums, twelve singles and three DVDs. After signing to Atlantic Records in 1986, and changing their name from Legacy to Testament, they released their debut album The Legacy in 1987, and broke into the U.S. mainstream with its follow-up album The New Order (1988). Their next four studio albums—Practice What You Preach (1989), Souls of Black (1990), The Ritual (1992) and Low (1994)—were also successful, with the former of the three entering the Top 100 on the Billboard 200 chart. Over the course of its career, Testament has experienced several resurgences of popularity, with two of their studio albums—Dark Roots of Earth (2012) and Brotherhood of the Snake (2016)—entering the Top 20 on the Billboard 200, and they have toured consistently. The band released their latest studio album, Titans of Creation, on April 3, 2020.