https://bugs.gentoo.org/918642
https://github.com/gentoo/gentoo/pull/35142

commit 6537507d754ad049dbdc324ec6bdea8b30416d48
Author: matoro <matoro@users.noreply.github.com>
Date:   Fri Feb 16 12:44:14 2024 -0500

    test: nsgif: make failing tests fatal
    
    Right now, failing or erroring tests is not currently considered fatal.
    This makes any instance of either fatal.
    
    See: https://github.com/gentoo/gentoo/pull/35142

diff --git a/test/runtest.sh b/test/runtest.sh
index fd84847..ef7274c 100755
--- a/test/runtest.sh
+++ b/test/runtest.sh
@@ -68,7 +68,7 @@ done
 echo "Tests:${GIFTESTTOTC} Pass:${GIFTESTPASSC} Fail:${GIFTESTFAILC} Error:${GIFTESTERRC}"
 
 # exit code
-if [ "${GIFTESTERRC}" -gt 0 ]; then
+if [ "${GIFTESTERRC}" -gt 0 ] || [ "${GIFTESTFAILC}" -gt 0 ]; then
 	exit 1
 fi