diff --git a/core/modules/user/src/Tests/UserUsernameTest.php b/core/modules/user/src/Tests/UserUsernameTest.php
deleted file mode 100644
index 7b28df3..0000000
--- a/core/modules/user/src/Tests/UserUsernameTest.php
+++ /dev/null
@@ -1,146 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\user\Tests\UserUsernameTest.
- */
-
-namespace Drupal\user\Tests;
-
-use Drupal\Component\Utility\String;
-use Drupal\Component\Utility\Unicode;
-use Drupal\simpletest\WebTestBase;
-
-/**
- * Tests username functionality.
- *
- * @group user
- */
-class UserUsernameTest extends WebTestBase {
-
-  /**
-   * Modules to enable.
-   *
-   * @var array
-   */
-  public static $modules = array(
-    'node',
-    'block',
-    'comment',
-    'user_test_views',
-  );
-
-  /**
-   * The user with the shorter username.
-   *
-   * @var \Drupal\user\Entity\User
-   */
-  protected $userShortName;
-
-  /**
-   * The user with the longer username.
-   *
-   * @var \Drupal\user\Entity\User
-   */
-  protected $userLongName;
-
-  /**
-   * {@inheritdoc}
-   */
-  public function setUp() {
-    parent::setUp();
-
-    $this->drupalCreateContentType(array('type' => 'article'));
-    $this->container->get('comment.manager')->addDefaultField('node', 'article');
-
-    // Create user with short username.
-    $this->userShortName = $this->drupalCreateUser(
-      array(
-        'access content',
-        'access comments',
-        'post comments',
-        'skip comment approval',
-        'create article content',
-      ),
-      $this->randomString(30)
-    );
-
-    // Create user with long username.
-    $this->userLongName = $this->drupalCreateUser(
-      array(
-        'access content',
-        'access comments',
-        'post comments',
-        'skip comment approval',
-        'create article content',
-      ),
-      $this->randomString(31)
-    );
-  }
-
-  /**
-   * Tests author name display on nodes.
-   */
-  public function testTruncatedNodeAuthorName() {
-    // Test untruncated username.
-    $this->drupalLogin($this->userShortName);
-
-    $node = $this->drupalCreateNode(array('type' => 'article'));
-    $this->drupalGet('node/' . $node->id());
-    $this->assertText(String::checkPlain($this->userShortName->getUsername()), 'Untruncated username found.');
-
-    // Test truncated username.
-    $this->drupalLogin($this->userLongName);
-
-    $node = $this->drupalCreateNode(array('type' => 'article'));
-    $this->drupalGet('node/' . $node->id());
-    $this->assertNoText(String::checkPlain($this->userLongName->getUsername()), 'Untruncated username not found.');
-    $this->assertText(String::checkPlain(Unicode::truncate($this->userLongName->getUsername(), 29, FALSE, TRUE)), 'Truncated username found.');
-  }
-
-  /**
-   * Tests author name display on comments.
-   */
-  public function testTruncatedCommentAuthorName() {
-    $node = $this->drupalCreateNode(array('type' => 'article'));
-
-    $this->drupalLogin($this->userShortName);
-    $comment = array(
-      'subject[0][value]' => $this->randomMachineName(),
-      'comment_body[0][value]' => $this->randomMachineName(20),
-    );
-    $this->drupalPostForm('comment/reply/node/' . $node->id() . '/comment', $comment, t('Save'));
-    $this->assertText(String::checkPlain($this->userShortName->getUsername()), 'Untruncated username found.');
-    $this->drupalLogin($this->userLongName);
-    $comment = array(
-      'subject[0][value]' => $this->randomMachineName(),
-      'comment_body[0][value]' => $this->randomMachineName(20),
-    );
-    $this->drupalPostForm('comment/reply/node/' . $node->id() . '/comment', $comment, t('Save'));
-    $this->assertNoText(String::checkPlain($this->userLongName->getUsername()), 'Untruncated username not found.');
-    $this->assertText(String::checkPlain(Unicode::truncate($this->userLongName->getUsername(), 29, FALSE, TRUE)), 'Truncated username found.');
-  }
-
-
-  /**
-   * Tests username display in Who's New block.
-   */
-  public function testTruncatedWhosNewName() {
-    // Enable Who's New block.
-    $this->drupalPlaceBlock('views_block:who_s_new-block_1');
-
-    $this->drupalGet('<front>');
-
-    // The Who's new block requires a last access to be set.
-    // Log the users in for them to show up.
-    $this->drupalLogin($this->userShortName);
-    $this->drupalLogin($this->userLongName);
-    // Log user out to prevent a false negative
-    $this->drupalLogout();
-
-    $this->assertText(String::checkPlain($this->userShortName->getUsername()), 'Untruncated username found.');
-    $this->assertNoText(String::checkPlain($this->userLongName->getUsername()), 'Untruncated username not found.');
-    $this->assertText(String::checkPlain(Unicode::truncate($this->userLongName->getUsername(), 29, FALSE, TRUE)), 'Truncated username found.');
-  }
-
-}
\ No newline at end of file