diff --git a/core/modules/toolbar/src/Element/ToolbarItem.php b/core/modules/toolbar/src/Element/ToolbarItem.php
index 7f0216529ca5..2568b824b9b6 100644
--- a/core/modules/toolbar/src/Element/ToolbarItem.php
+++ b/core/modules/toolbar/src/Element/ToolbarItem.php
@@ -25,7 +25,7 @@ class ToolbarItem extends RenderElement {
       ],
       'tab' => [
         '#type' => 'link',
-        '#title' => NULL,
+        '#title' => '',
         '#url' => Url::fromRoute('<front>'),
       ],
     ];
diff --git a/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module b/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module
index cbc014054d3c..e399e267ff77 100644
--- a/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module
+++ b/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module
@@ -45,6 +45,9 @@ function toolbar_test_toolbar() {
     ],
     '#weight' => 50,
   ];
+  $items['empty'] = [
+    '#type' => 'toolbar_item',
+  ];
 
   return $items;
 }