diff --git a/core/modules/toolbar/src/Element/ToolbarItem.php b/core/modules/toolbar/src/Element/ToolbarItem.php
index 79cbed2d032e757f3bbb2e079081a44e16037c4f..6aec2d27120519574504a208457e22d6ff165095 100644
--- a/core/modules/toolbar/src/Element/ToolbarItem.php
+++ b/core/modules/toolbar/src/Element/ToolbarItem.php
@@ -56,7 +56,6 @@ public static function preRenderToolbarItem($element) {
       // Provide attributes necessary for trays.
       $attributes += [
         'data-toolbar-tray' => $id . '-tray',
-        'aria-owns' => $id . '-tray',
         'role' => 'button',
         'aria-pressed' => 'false',
       ];