diff --git a/tests/fork_rand.sh b/tests/fork_rand.sh
index 333516e..d1e2685 100755
--- a/tests/fork_rand.sh
+++ b/tests/fork_rand.sh
@@ -4,6 +4,7 @@ while read -r a b;
 do
 	if [ "$a" = "$b" ]; then
 		echo "FAIL: $a = $b"
+		return 2
 	else
 		echo "PASS: $a != $b"
 	fi