diff --git a/core/modules/system/src/Tests/Form/AccessibilityTest.php b/core/modules/system/src/Tests/Form/AccessibilityTest.php
index 271580e..13abd80 100644
--- a/core/modules/system/src/Tests/Form/AccessibilityTest.php
+++ b/core/modules/system/src/Tests/Form/AccessibilityTest.php
@@ -37,7 +37,7 @@ public function testFormAccessibility() {
 
     // Scan all modules for forms.
     $forms = array();
-    $scanner = new SystemListingTest(array(drupal_get_profile());
+    $scanner = new SystemListingTest(array(drupal_get_profile()));
     $modules = $scanner->scan('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.info.yml$/', 'modules');
     foreach ($modules as $module_file) {
       $module_name = basename($module_file->filename, '.info.yml');