diff --git themes/seven/vertical-tabs.css themes/seven/vertical-tabs.css
index 0d84d7c..5e99319 100644
--- themes/seven/vertical-tabs.css
+++ themes/seven/vertical-tabs.css
@@ -28,6 +28,9 @@ div.vertical-tabs ul li.vertical-tab-button {
   list-style-image: none;
   margin: 0;
 }
+div.vertical-tabs ul li.vertical-tab-button:focus {
+  outline: 0;
+}
 div.vertical-tabs ul li.vertical-tab-button a {
   border-top: 1px solid #ccc;
   display: block;