diff --git a/core/modules/system/system.theme.css b/core/modules/system/system.theme.css
index a3c770a..faa3cd1 100644
--- a/core/modules/system/system.theme.css
+++ b/core/modules/system/system.theme.css
@@ -445,8 +445,8 @@ ul.tabs {
   padding: 0;
   margin: 0;
 }
-.messages li + li {
-  margin-top: .769em;
+.messages > ul > li + li {
+  margin-top: 0.769em;
 }
 
 /* @TODO Separate tables and messages styling */