diff --git a/test-docker.sh b/test-docker.sh
index d320474..a870e1d 100755
--- a/test-docker.sh
+++ b/test-docker.sh
@@ -15,6 +15,10 @@ function title() {
     echo "----------------------------------------"
 }   
 
+function die() {
+    title "error: $1"
+    exit 1
+}
 
 function wait_for_container {
     container_id="$1"