diff --git a/core/modules/block_place/block_place.module b/core/modules/block_place/block_place.module
index e3532bd..581d20b 100644
--- a/core/modules/block_place/block_place.module
+++ b/core/modules/block_place/block_place.module
@@ -58,7 +58,7 @@ function block_place_toolbar() {
       ],
     ],
     '#wrapper_attributes' => [
-      'class' => ['block-place-toolbar-tab'],
+      'class' => ['contextual-toolbar-tab', 'block-place-toolbar-tab'],
     ],
     '#weight' => 100,
   ];