diff --git a/test.sh b/test.sh
index c4f3cac..324a237 100755
--- a/test.sh
+++ b/test.sh
@@ -25,7 +25,7 @@ run_solution() {
 	fi
 }
 
-shopt -s dotglob
+shopt -s dotglob nullglob
 
 for day in day*; do
 	input=data/$day.input