--- a/devtools/client/themes/rules.css
+++ b/devtools/client/themes/rules.css
@@ -167,17 +167,18 @@
 
 .ruleview-propertyvaluecontainer a {
   cursor: pointer;
 }
 
 .ruleview-computedlist,
 .ruleview-overridden-items[hidden],
 .ruleview-overridden-rule-filter[hidden],
-.ruleview-warning[hidden] {
+.ruleview-warning[hidden],
+.ruleview-overridden .ruleview-grid {
   display: none;
 }
 
 .ruleview-computedlist[user-open],
 .ruleview-computedlist[filter-open],
 .ruleview-overridden-items {
   display: block;
 }