Issue #2068471 follow-up by dawehner, Crell, jbrown: Fix fatal error in admin/reports/status

core/modules/system/lib/Drupal/system/Tests/System/StatusTest.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Tests\System\StatusTest.
+ */
+
+namespace Drupal\system\Tests\System;
+
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Tests administrative status page.
+ */
+class StatusTest extends WebTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getInfo() {
+    return array(
+      'name' => 'Status page',
+      'description' => 'Tests output on the status overview page.',
+      'group' => 'System',
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $admin_user = $this->drupalCreateUser(array(
+      'administer site configuration',
+    ));
+    $this->drupalLogin($admin_user);
+  }
+
+  /**
+   * Tests that the status page returns.
+   */
+  public function testStatusPage() {
+    // Go to Administration.
+    $this->drupalGet('admin/reports/status');
+    $this->assertResponse(200, 'The status page is reachable.');
+  }
+
+}

core/modules/system/system.routing.yml

@@ -272,7 +272,7 @@ system.theme_enable:
 system.status:
   path: '/admin/reports/status'
   defaults:
-    _controller: 'Drupal\system\Controller\SystemInfoController::status'
+    _content: 'Drupal\system\Controller\SystemInfoController::status'
     _title: 'Status report'
   requirements:
     _permission: 'administer site configuration'