diff -u b/core/themes/seven/css/components/messages.css b/core/themes/seven/css/components/messages.css
--- b/core/themes/seven/css/components/messages.css
+++ b/core/themes/seven/css/components/messages.css
@@ -17,5 +17,5 @@
 .messages h5, .messages .heading-e,
 .messages h6, .messages .heading-f {
-  margin-top:0;
+  margin-top: 0;
 }