diff --git a/core/includes/form.inc b/core/includes/form.inc
index 5698f86..7c75003 100644
--- a/core/includes/form.inc
+++ b/core/includes/form.inc
@@ -828,7 +828,7 @@ function batch_process($redirect = NULL, Url $url = NULL, $redirect_callback = N
       $query_options['id'] = $batch['id'];
       $batch_url->setOption('query', $query_options);
       if (($function = $batch['redirect_callback']) && function_exists($function)) {
-        $function($batch_url, ['query' => $query_options]);
+        $function($batch_url->toString(), ['query' => $query_options]);
       }
       else {
         $batch_url->setAbsolute();
diff --git a/core/modules/update/tests/modules/update_test/update_test.routing.yml b/core/modules/update/tests/modules/update_test/update_test.routing.yml
index 708d42f..5dd8d4c 100644
--- a/core/modules/update/tests/modules/update_test/update_test.routing.yml
+++ b/core/modules/update/tests/modules/update_test/update_test.routing.yml
@@ -11,5 +11,6 @@ update_test.update_test:
     _title: 'Update test'
     _controller: '\Drupal\update_test\Controller\UpdateTestController::updateTest'
     version: NULL
+    project_name: NULL
   requirements:
     _access: 'TRUE'