The version of "Testify" included on early pressings of Up for the Down Stroke featured a mix that highlighted the group vocals and deemphasized the instrumental sound. On later pressings this was replaced by a version with different, more rhythm-intensive mix - the version heard on the song's single release. The original mix of the song was included as a bonus track on the 2003 CD reissue of the album.
The version of this song on the original album release also deleted a small portion of the clavinet introduction. This was restored on the 1993 compilation release Tear the Roof Off 1974-1980.