diff --git a/core/modules/system/lib/Drupal/system/Tests/System/DateFormatsLanguageTest.php b/core/modules/system/lib/Drupal/system/Tests/System/DateFormatsLanguageTest.php
deleted file mode 100644
index 2b63cc9..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/System/DateFormatsLanguageTest.php
+++ /dev/null
@@ -1,114 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\System\DateFormatsLanguageTest.
- */
-
-namespace Drupal\system\Tests\System;
-
-use Drupal\Core\Language\Language;
-use Drupal\simpletest\WebTestBase;
-
-/**
- * Functional tests for localizing date formats.
- */
-class DateFormatsLanguageTest extends WebTestBase {
-
-  /**
-   * Modules to enable.
-   *
-   * @var array
-   */
-  public static $modules = array('node', 'locale');
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Localize date formats',
-      'description' => 'Tests for the localization of date formats.',
-      'group' => 'System',
-    );
-  }
-
-  function setUp() {
-    parent::setUp();
-
-    // Create Article node type.
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
-
-    // Create and login user.
-    $admin_user = $this->drupalCreateUser(array('administer site configuration', 'administer languages', 'access administration pages', 'create article content'));
-    $this->drupalLogin($admin_user);
-  }
-
-  /**
-   * Functional tests for localizing date formats.
-   */
-  function testLocalizeDateFormats() {
-    // Add language.
-    $edit = array(
-      'predefined_langcode' => 'fr',
-    );
-    $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
-
-    // Set language negotiation.
-    $language_type = Language::TYPE_INTERFACE;
-    $edit = array(
-      "{$language_type}[enabled][language-url]" => TRUE,
-    );
-    $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
-
-    // Add new date format for French.
-    $edit = array(
-      'id' => 'example_style_fr',
-      'label' => 'Example Style',
-      'date_format_pattern' => 'd.m.Y - H:i',
-      'locales[]' => array('fr'),
-    );
-    $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
-
-    // Add new date format for English.
-    $edit = array(
-      'id' => 'example_style_en',
-      'label' => 'Example Style',
-      'date_format_pattern' => 'j M Y - g:ia',
-      'locales[]' => array('en'),
-    );
-    $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
-
-    // Configure date formats.
-    $this->drupalGet('admin/config/regional/date-time/locale');
-    $this->assertText('French', 'Configured languages appear.');
-    $edit = array(
-      'date_format_long' => 'example_style_fr',
-      'date_format_medium' => 'example_style_fr',
-      'date_format_short' => 'example_style_fr',
-    );
-    $this->drupalPostForm('admin/config/regional/date-time/locale/fr/edit', $edit, t('Save configuration'));
-    $this->assertText(t('Configuration saved.'), 'French date formats updated.');
-
-    $edit = array(
-      'date_format_long' => 'example_style_en',
-      'date_format_medium' => 'example_style_en',
-      'date_format_short' => 'example_style_en',
-    );
-    $this->drupalPostForm('admin/config/regional/date-time/locale/en/edit', $edit, t('Save configuration'));
-    $this->assertText(t('Configuration saved.'), 'English date formats updated.');
-
-    // Create node content.
-    $node = $this->drupalCreateNode(array('type' => 'article'));
-
-    // Configure format for the node posted date changes with the language.
-    $this->drupalGet('node/' . $node->id());
-    $english_date = format_date($node->getCreatedTime(), 'custom', 'j M Y');
-    $this->assertText($english_date, 'English date format appears');
-    $this->drupalGet('fr/node/' . $node->id());
-    $french_date = format_date($node->getCreatedTime(), 'custom', 'd.m.Y');
-    $this->assertText($french_date, 'French date format appears');
-
-    // Make sure we can reset dates back to default.
-    $this->drupalPostForm('admin/config/regional/date-time/locale/en/reset', array(), t('Reset'));
-    $this->drupalGet('node/' . $node->id());
-    $this->assertNoText($english_date, 'English date format does not appear');
-  }
-}