diff --git a/seed/challenges/01-front-end-development-certification/html5-and-css.json b/seed/challenges/01-front-end-development-certification/html5-and-css.json
index b7dbc2727a2..5e89efbdee2 100644
--- a/seed/challenges/01-front-end-development-certification/html5-and-css.json
+++ b/seed/challenges/01-front-end-development-certification/html5-and-css.json
@@ -265,7 +265,7 @@
         "assert($(\"h1\").length > 0, 'message: Make your <code>h1</code> element visible on your page by uncommenting it.');",
         "assert($(\"h2\").length > 0, 'message: Make your <code>h2</code> element visible on your page by uncommenting it.');",
         "assert($(\"p\").length > 0, 'message: Make your <code>p</code> element visible on your page by uncommenting it.');",
-        "assert(!/-->/gi.test(code), 'message: Be sure to delete all trailing comment tags&#44; i.e. <code>--&#62;</code>.');"
+        "assert(!/-->/gi.test(code.replace(/ *<!--.*\\n/g,'')), 'message: Be sure to delete all trailing comment tags&#44; i.e. <code>--&#62;</code>.');"
       ],
       "type": "waypoint",
       "titleEs": "Quita comentarios HTML",