diff --git a/demo_source.sh b/demo_source.sh
index 503a48f..f949a26 100755
--- a/demo_source.sh
+++ b/demo_source.sh
@@ -6,7 +6,9 @@
 
 function upgrade {
   echo UPGRADE
-  sudo -E "$MIAOU_BASH_DIR"/bin/miaou-bash none
+  if sudo -E "$MIAOU_BASH_DIR"/bin/miaou-bash none 3>&1; then
+    echo FAILURE $?
+  fi
 }
 
 function assert_supported_distro {