diff --git a/core/modules/block/block.admin.css b/core/modules/block/block.admin.css
index c6b9089..f2a6d07 100644
--- a/core/modules/block/block.admin.css
+++ b/core/modules/block/block.admin.css
@@ -1,12 +1,12 @@
 
-#blocks tr.region-title td {
+.block-admin-display-form .region-title td {
   font-weight: bold;
 }
-#blocks tr.region-message {
+.block-admin-display-form .region-message {
   font-weight: normal;
   color: #999;
 }
-#blocks tr.region-populated {
+.block-admin-display-form .region-populated {
   display: none;
 }
 .block-region {