Practice What You Preach (Testament cover) Jan 13, 2016 Cover, Cover Metal, Cover Practice What You Preach, Cover Testament, Cover Thrash Metal, Live At The Fillmore, Practice What You Preach, by a teen band called Insanity, in 1990. Like 0 Thanks! You've already liked this « Yakoba – Box Elder (Pavement cover) » Boxelder-Teach The World