Souls of Black is the fourth studio album by American thrash metal band Testament.

While Souls of Black saw Testament staying true to their thrash sound, it saw several changes in style to rather diverse styles of metal, continuing the melding of technical and progressive influences that began on its predecessor Practice What You Preach, and preceding the traditional heavy metal sound heard in its subsequent album, The Ritual.

[1] Souls of Black sees Testament continuing in a vein similar to that of Practice What You Preach, with its lyrics dealing with society, politics, religion, suicide, megalomania and warfare.

One of the main reasons behind the making of Souls of Black was so that Testament could participate in the European Clash of the Titans tour with Megadeth, Slayer and Suicidal Tendencies, which began just prior to the album's release.

Guitarist Eric Peterson explained to Guitar World magazine, "We kind of rushed out Souls of Black just to get on the bill, because we didn't want to miss the tour and our label said we had to have an album out.