diff --git a/core/modules/overlay/css/overlay-tabs.css b/core/modules/overlay/css/overlay-tabs.css
index aa063dc..1282c0f 100644
--- a/core/modules/overlay/css/overlay-tabs.css
+++ b/core/modules/overlay/css/overlay-tabs.css
@@ -77,13 +77,7 @@
 }
 #overlay-tabs ul.primary .active a {
   background-color: #ffffff;
-  border-right: 1px solid #b3b3b3;
   border-top-right-radius: 5px;
-  /* Use two short box shadows, one shifted right and one shifted left so that
-     we don't have the shadow bleed under the bottom of the tab. */
-  -webkit-box-shadow: 2px -1px 2px -1px rgba(0, 0, 0, 0.2), -2px -1px 2px -1px rgba(0, 0, 0, 0.2);
-  -moz-box-shadow: 2px -1px 2px -1px rgba(0, 0, 0, 0.2), -2px -1px 2px -1px rgba(0, 0, 0, 0.2);
-  box-shadow: 2px -1px 2px -1px rgba(0, 0, 0, 0.2), -2px -1px 2px -1px rgba(0, 0, 0, 0.2);
   color: #004f80;
 }