diff --git a/tests/cibuild.sh b/tests/cibuild.sh
index 854295b..01b5e05 100755
--- a/tests/cibuild.sh
+++ b/tests/cibuild.sh
@@ -6,4 +6,4 @@ bundle exec jekyll build
 
 #These tests check if your image references,
 #alt tags, internal links...
-#bundle exec htmlproof ./_site --only-4xx  --check-html --href-ignore "#"
+bundle exec htmlproof ./_site --only-4xx  --check-html --href-ignore "#"