diff --git a/core/modules/system/src/Controller/BatchController.php b/core/modules/system/src/Controller/BatchController.php
index 1c2f379..9a0e8f0 100644
--- a/core/modules/system/src/Controller/BatchController.php
+++ b/core/modules/system/src/Controller/BatchController.php
@@ -83,7 +83,7 @@ public function batchPage(Request $request) {
    */
   public function batchPageTitle() {
     $current_set = _batch_current_set();
-    return $current_set['title'];
+    return !empty($current_set['title']) ? $current_set['title'] : '';
   }
 
 }
diff --git a/core/modules/system/tests/modules/batch_test/src/Controller/BatchTestController.php b/core/modules/system/tests/modules/batch_test/src/Controller/BatchTestController.php
index 6e1d540..19ea6e9 100644
--- a/core/modules/system/tests/modules/batch_test/src/Controller/BatchTestController.php
+++ b/core/modules/system/tests/modules/batch_test/src/Controller/BatchTestController.php
@@ -121,12 +121,12 @@ public function testThemeBatch() {
    */
   public function testTitleBatch() {
     batch_test_stack(NULL, TRUE);
-    $batch = array(
+    $batch = [
       'title' => 'Batch Test',
-      'operations' => array(
-        array('_batch_test_title_callback', array()),
-      ),
-    );
+      'operations' => [
+        ['_batch_test_title_callback', []],
+      ],
+    ];
     batch_set($batch);
     return batch_process('batch-test/redirect');
   }