diff --git a/core/modules/help/lib/Drupal/help/Tests/HelpTest.php b/core/modules/help/lib/Drupal/help/Tests/HelpTest.php
index 7c1e639..0f1c0d8 100644
--- a/core/modules/help/lib/Drupal/help/Tests/HelpTest.php
+++ b/core/modules/help/lib/Drupal/help/Tests/HelpTest.php
@@ -110,8 +110,8 @@ class HelpTest extends WebTestBase {
     $modules = array();
     $module_data = system_rebuild_module_data();
     foreach (module_config()->get() as $module => $data) {
-      if (file_exists($module_data->filename) && function_exists($module . '_help')) {
-        $modules[$module] = $data->info['name'];
+      if (file_exists($module_data[$module]->filename) && function_exists($module . '_help')) {
+        $modules[$module] = $module_data[$module]->info['name'];
       }
     }
     return $modules;