Tracks
| # | Title | Sung by | |
|---|---|---|---|
| 1 | Optimistic (UK 7" edit) | Sounds of Blackness | 3:48 |
| 2 | Optimistic (album version) | Sounds of Blackness | 5:22 |
| 3 | Testify (album version) | Sounds of Blackness | 5:00 |
| 4 | Testify (7" edit) | Sounds of Blackness | 4:19 |
Source: MusicBrainz release group c29657a0-6bc0-4c44-a9cf-a35f53d5f116 (CC0). Cover: Cover Art Archive.