diff --git a/tests/4_container_images.sh b/tests/4_container_images.sh
index 165b5e2..94e2697 100644
--- a/tests/4_container_images.sh
+++ b/tests/4_container_images.sh
@@ -49,7 +49,7 @@ check_4_1() {
     for c in $containers; do
       user=$(docker inspect --format 'User={{.Config.User}}' "$c")
 
-      if [ "$user" = "User=" ] || [ "$user" = "User=[]" ] || [ "$user" = "User=<no value>" ]; then
+      if [ "$user" = "User=0" ] || [ "$user" = "User=root" ] || [ "$user" = "User=" ] || [ "$user" = "User=[]" ] || [ "$user" = "User=<no value>" ]; then
         # If it's the first container, fail the test
         if [ $fail -eq 0 ]; then
           warn "$check_4_1"