We no longer include a MAC on tickets when we fuzz. That renders this test inoperative. That it still worked was an accident. I've disabled it, but plan to remove it completely.
https://hg.mozilla.org/projects/nss/rev/1c41fdf0814e9e19aaeffca1f2feaa825109a9c2 disables the test https://nss-review.dev.mozaws.net/D386 for the removal
HAHAHA, DISABLED_foo doesn't work because the fuzzing tests have an extra prefix added. I landed the removal. https://hg.mozilla.org/projects/nss/rev/b3d43e8f208fa9a2d4906e79ebe15d947285001d I'm closing this; Tim, feel free to re-open if you think I'm crazy.