Jun-Jun is a track by the American heavy metal band Testament, appearing on their 1997 album Demonic. The song exemplifies the band's signature style, blending aggressive riffs with melodic sensibilities that defined the thrash metal genre during the mid-to-late 1990s. Released during a period of significant commercial success for Testament, the recording showcases the group's technical proficiency and dynamic range, contributing to their legacy as a pioneering force in the genre. The track remains a staple of their discography, often cited by fans and critics alike for its powerful delivery and enduring impact on the heavy metal landscape.