reverted:
--- b/core/modules/system/lib/Drupal/system/Tests/Form/ModuleListFormWebTest.php
+++ /dev/null
@@ -1,44 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Form\ModulesListFormWebTest.
- */
-
-namespace Drupal\system\Tests\Form;
-
-use Drupal\simpletest\WebTestBase;
-
-/**
- * Tests \Drupal\system\Form\ModulesListForm.
- */
-class ModuleListFormWebTest extends WebTestBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public static $modules = array('system_test');
-
-  /**
-   * {@inheritdoc}
-   */
-  public static function getInfo() {
-    return array(
-      'description' => '',
-      'name' => '\Drupal\system\Form\ModulesListForm web test',
-      'group' => 'Module',
-    );
-  }
-
-  /**
-   * Tests the module list form.
-   */
-  public function testModuleListForm() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer modules')));
-    $this->drupalGet('admin/modules');
-    $this->assertResponse('200');
-
-    // Check that system_test's configure link was rendered correctly.
-    $this->assertLinkByHref('configure/bar');
-  }
-}