diff --git a/test.sh b/test.sh
index afd0c18..33af165 100755
--- a/test.sh
+++ b/test.sh
@@ -27,7 +27,7 @@ run_solution() {
 	fi
 }
 
-shopt -s dotglob
+shopt -s dotglob nullglob
 
 for n in $(seq 1 25); do
 	input=$YEAR/data/day$n.input