diff --git a/test-plone-4.0.x.cfg b/test-plone-4.0.x.cfg
index 26b917e..4d9214a 100644
--- a/test-plone-4.0.x.cfg
+++ b/test-plone-4.0.x.cfg
@@ -120,6 +120,7 @@ input = inline:
     find plone/app/discussion -regex ".*\.[c|z]?pt" | xargs bin/zptlint > zptlint.log
     if [ -s zptlint.log ]; then 
       echo "Errors were found, see zptlint.log for details"
+      exit 1;
     else
       echo "No errors found"
       rm zptlint.log