diff --git a/core/modules/contact/lib/Drupal/contact/Tests/ContactUpgradePathTest.php b/core/modules/contact/lib/Drupal/contact/Tests/ContactUpgradePathTest.php
deleted file mode 100644
index b5785aa..0000000
--- a/core/modules/contact/lib/Drupal/contact/Tests/ContactUpgradePathTest.php
+++ /dev/null
@@ -1,69 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\contact\Tests\ContactUpgradePathTest.
- */
-
-namespace Drupal\contact\Tests;
-
-use Drupal\system\Tests\Upgrade\UpgradePathTestBase;
-
-/**
- * Tests upgrade of contact.
- */
-class ContactUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name' => 'Contact upgrade test',
-      'description' => 'Tests upgrade of contact to the configuration system.',
-      'group' => 'Contact',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'contact') . '/tests/drupal-7.contact.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests upgrade of contact table to configuration entities.
-   */
-  public function testContactUpgrade() {
-    $default_contact_category = db_query('SELECT cid FROM {contact} WHERE selected = 1')->fetchField();
-
-    $this->assertTrue(db_table_exists('contact'), 'Contact table exists.');
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Test that the contact form is available.
-    $this->assertFalse(db_table_exists('contact'), 'Contact table has been deleted.');
-    $this->drupalGet('contact');
-    $this->assertText(t('Your e-mail address'));
-
-    // Ensure that the Drupal 7 default contact category has been created.
-    $contact_category = entity_load('contact_category', '1');
-    $this->assertTrue(isset($contact_category->uuid), 'Converted contact category has a UUID');
-    $this->assertEqual($contact_category->label, 'Website feedback');
-    $this->assertEqual($contact_category->reply, '');
-    $this->assertEqual($contact_category->weight, 0);
-    $this->assertEqual($contact_category->recipients, array('admin@example.com'));
-
-    // Test that the custom contact category has been updated.
-    $contact_category = entity_load('contact_category', '2');
-    $this->assertTrue(isset($contact_category->uuid), 'Converted contact category has a UUID');
-    $this->assertEqual($contact_category->label, 'Upgrade test');
-    $this->assertEqual($contact_category->reply, 'Test reply');
-    $this->assertEqual($contact_category->weight, 1);
-    $this->assertEqual($contact_category->recipients, array('test1@example.com', 'test2@example.com'));
-
-    // Ensure that the default category has been maintained.
-    $this->assertEqual(\Drupal::config('contact.settings')->get('default_category'), $default_contact_category, 'Default category upgraded.');
-
-    // Check that no default config imported on upgrade.
-    $this->assertFalse(entity_load('contact_category', 'feedback'));
-  }
-}
-
diff --git a/core/modules/rdf/lib/Drupal/rdf/Tests/RdfMappingUpgradePathTest.php b/core/modules/rdf/lib/Drupal/rdf/Tests/RdfMappingUpgradePathTest.php
deleted file mode 100644
index bb8f491..0000000
--- a/core/modules/rdf/lib/Drupal/rdf/Tests/RdfMappingUpgradePathTest.php
+++ /dev/null
@@ -1,122 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\rdf\Tests\RdfMappingUpgradePathTest.
- */
-
-namespace Drupal\rdf\Tests;
-
-use Drupal\system\Tests\Upgrade\UpgradePathTestBase;
-
-/**
- * Tests the upgrade path of RDF mappings.
- */
-class RdfMappingUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'RDF mapping upgrade test',
-      'description' => 'Upgrade tests with RDF mapping data.',
-      'group' => 'RDF',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'rdf') . '/tests/drupal-7.rdf.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests to see if RDF mappings were upgraded.
-   */
-  public function testRdfMappingUpgrade() {
-    $this->assertTrue(db_table_exists('rdf_mapping'), 'RDF mapping table exists.');
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    $this->_testUnalteredMappingUpgrade();
-    $this->_testAlteredMappingUpgrade();
-    $this->_testReverseRelationUpgrade();
-
-  }
-
-  /**
-   * Helper function to test upgrade of unaltered mappings.
-   */
-  protected function _testUnalteredMappingUpgrade() {
-    $config = rdf_get_mapping('node', 'page');
-
-    // Test bundle mapping.
-    $mapping = $config->getBundleMapping();
-    $expected_mapping = array(
-      'types' => array('foaf:Document'),
-    );
-    $this->assertEqual($mapping, $expected_mapping, 'Unaltered bundle mapping upgraded correctly.');
-
-    // Test field mapping - property.
-    $mapping = $config->getFieldMapping('title');
-    $expected_mapping = array(
-      'properties' => array('dc:title'),
-    );
-    $this->assertEqual($mapping, $expected_mapping, 'Unaltered field mapping upgraded correctly.');
-
-    // Test field mapping - property with datatype and callback.
-    $mapping = $config->getFieldMapping('created');
-    $expected_mapping = array(
-      'properties' => array('dc:date', 'dc:created'),
-      'datatype' => 'xsd:dateTime',
-      'datatype_callback' => array('callable' => 'date_iso8601'),
-    );
-    $this->assertEqual($mapping, $expected_mapping, 'Unaltered field mapping with datatype and datatype callback upgraded correctly.');
-
-    // Test field mapping - rel.
-    $mapping = $config->getFieldMapping('uid');
-    $expected_mapping = array(
-      'properties' => array('sioc:has_creator'),
-      'mapping_type' => 'rel',
-    );
-    $this->assertEqual($mapping, $expected_mapping, 'Unaltered field mapping with rel mapping type upgraded correctly.');
-  }
-
-  /**
-   * Helper function to test upgrade of altered mappings.
-   */
-  protected function _testAlteredMappingUpgrade() {
-    $config = rdf_get_mapping('node', 'article');
-
-    // Test bundle mapping.
-    $mapping = $config->getBundleMapping();
-    $expected_mapping = array(
-      'types' => array('foo:Type'),
-    );
-    $this->assertEqual($mapping, $expected_mapping, 'Overriden bundle mapping upgraded correctly.');
-
-    // Test field mapping.
-    $mapping = $config->getFieldMapping('field_image');
-    $expected_mapping = array(
-      'properties' => array('foo:image'),
-    );
-    $this->assertEqual($expected_mapping, $mapping, 'Overriden field mapping is upgraded correctly.');
-
-    // Test field mapping.
-    $mapping = $config->getFieldMapping('changed');
-    $expected_mapping = array();
-    $this->assertEqual($expected_mapping, $mapping, 'Empty field mapping from overriden mapping is upgraded correctly.');
-  }
-
-  /**
-   * Helper function to test handling of deprecated reverse relation mappings.
-   */
-  protected function _testReverseRelationUpgrade() {
-    // Test field mapping - rev.
-    $config = rdf_get_mapping('node', 'rev_test');
-    $mapping = $config->getFieldMapping('field_rev');
-    $expected_mapping = array();
-    $this->assertEqual($mapping, $expected_mapping, 'Reverse relation mapping has been dropped.');
-  }
-
-}
diff --git a/core/modules/search/lib/Drupal/search/Tests/SearchUpgradePathTest.php b/core/modules/search/lib/Drupal/search/Tests/SearchUpgradePathTest.php
deleted file mode 100644
index e5678bc..0000000
--- a/core/modules/search/lib/Drupal/search/Tests/SearchUpgradePathTest.php
+++ /dev/null
@@ -1,49 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\search\Tests\SearchUpgradePathTest.
- */
-
-namespace Drupal\search\Tests;
-
-use Drupal\system\Tests\Upgrade\UpgradePathTestBase;
-
-/**
- * Tests the upgrade path of search configuration and tables.
- */
-class SearchUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Search module upgrade test',
-      'description' => 'Upgrade tests for search module configuration and tables.',
-      'group' => 'Search',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'search') . '/tests/upgrade/drupal-7.search.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests to see if search configuration and tables were upgraded.
-   */
-  public function testSearchUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-    $this->assertFalse(db_table_exists('search_node_links'), 'search_node_links table was dropped.');
-    $config = \Drupal::config('search.settings');
-     // The starting database has user module as the only active search.
-    $this->assertEqual($config->get('active_plugins'), array('user_search' => 'user_search'));
-    $exists = db_query('SELECT 1 FROM {variable} WHERE name = :name', array(':name' => 'search_active_modules'))->fetchField();
-    $this->assertFalse($exists, 'The search_active_modules variable was deleted by the update');
-    // The starting database has user module as the default.
-    $this->assertEqual($config->get('default_plugin'), 'user_search');
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ActionUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/ActionUpgradePathTest.php
deleted file mode 100644
index 33da11b..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ActionUpgradePathTest.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\ActionUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests the upgrade path of actions.
- */
-class ActionUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Action upgrade test',
-      'description' => 'Upgrade tests with action data.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.minimal.database.php.gz',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests to see if actions were upgrade.
-   */
-  public function testActionUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    $this->drupalGet('admin/people');
-    $elements = $this->xpath('//select[@name="action"]/option');
-    $this->assertTrue(!empty($elements), 'The user actions were upgraded.');
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareMinimalAnonymousUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareMinimalAnonymousUpgradePathTest.php
deleted file mode 100644
index 947625b..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareMinimalAnonymousUpgradePathTest.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\BareMinimalAnonymousUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests the upgrade path without prior creation of config directions.
- */
-class BareMinimalAnonymousUpgradePathTest extends BareMinimalUpgradePathTest {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Basic minimal profile upgrade, free access',
-      'description' => 'Basic upgrade path tests for a minimal profile install with a bare database and update_free_access set to TRUE.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  /**
-   * Overrides \Drupal\system\Tests\Upgrade\UpgradePathTestBase::setUp().
-   */
-  public function setUp() {
-    parent::setUp();
-
-    // Override $update_free_access in settings.php to allow the anonymous user
-    // to run updates.
-    $settings['settings'] = array(
-      'update_free_access' => (object) array(
-        'value' => TRUE,
-        'required' => TRUE,
-      ),
-      'install_profile' => (object) array(
-        'value' => $this->profile,
-        'required' => TRUE,
-      ),
-    );
-    $this->writeSettings($settings);
-  }
-
-  /**
-   * Overrides \Drupal\system\Tests\Upgrade\UpgradePathTestBase::prepareD8Session().
-   */
-  protected function prepareD8Session() {
-    // There is no active session, so nothing needs to be done here.
-  }
-
-  /**
-   * Overrides \Drupal\system\Tests\Upgrade\UpgradePathTestBase::assertSessionKept().
-   */
-  protected function finishUpgradeSession() {
-    // There is no active session, so nothing needs to be done here.
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareMinimalNoConfigUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareMinimalNoConfigUpgradePathTest.php
deleted file mode 100644
index e5858fc..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareMinimalNoConfigUpgradePathTest.php
+++ /dev/null
@@ -1,79 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\BareMinimalNoConfigUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests the database upgrade path without creating config directories.
- */
-class BareMinimalNoConfigUpgradePathTest extends BareMinimalUpgradePathTest {
-
-  /**
-   * The installation profile used in the upgrade test.
-   */
-  protected $profile = 'minimal';
-
-  public static function getInfo() {
-    return array(
-      'name'  => 'Basic minimal profile upgrade, no config',
-      'description'  => 'Basic upgrade path tests for a minimal profile install with a bare database and config directory not pre-created.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  /**
-   * Overrides \Drupal\system\Tests\Upgrade\UpgradePathTestBase::setUp().
-   */
-  public function setUp() {
-    parent::setUp();
-
-    // Override $conf_path and $config_directories in settings.php.
-    $settings['conf_path'] = (object) array(
-      'value' => $this->public_files_directory,
-      'required' => TRUE,
-    );
-    $settings['config_directories'] = (object) array(
-      'value' => array(),
-      'required' => TRUE,
-    );
-    $settings['settings'] = array(
-      'install_profile' => (object) array(
-        'value' => $this->profile,
-        'required' => TRUE,
-      ),
-    );
-    $this->writeSettings($settings);
-  }
-
-  /**
-   * Overrides \Drupal\system\Tests\Upgrade\UpgradePathTestBase::refreshVariables().
-   */
-  protected function refreshVariables() {
-    // Refresh the variables only if the site was already upgraded.
-    if ($this->upgradedSite) {
-      // update.php puts the new, randomized config directries in this file.
-      include $this->public_files_directory . '/settings.php';
-      $GLOBALS['config_directories'] = array();
-      foreach ($config_directories as $type => $data) {
-        // update.php runs as the child site, so writes the paths relative to
-        // that "$conf_path/files", but here, we're running as the parent site,
-        // so need to make the paths relative to our "conf_path()/files".
-        //
-        // Example:
-        // - Parent site conf_path(): 'sites/default'
-        // - Child site $conf_path: 'sites/default/files/simpletest/123456'
-        // - Child site $data['path']: 'config_xyz'
-        // - Desired result: 'simpletest/123456/files/config_xyz'
-        //
-        // @see config_get_config_directory()
-        $GLOBALS['config_directories'][$type]['path'] = substr($conf_path, strlen(conf_path() . '/files/')) . '/files/' . $data['path'];
-      }
-      parent::refreshVariables();
-    }
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareMinimalUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareMinimalUpgradePathTest.php
deleted file mode 100644
index 914b72d..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareMinimalUpgradePathTest.php
+++ /dev/null
@@ -1,103 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\BareMinimalUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Core\Session\UserSession;
-
-/**
- * Performs major version release upgrade tests on a bare database.
- *
- * Loads an installation of Drupal 7.x and runs the upgrade process on it.
- *
- * The install contains the minimal profile modules (without any generated
- * content) so that an upgrade from of a site under this profile may be tested.
- */
-class BareMinimalUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name'  => 'Basic minimal profile upgrade path, bare database',
-      'description'  => 'Basic upgrade path tests for a minimal profile install with a bare database.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.minimal.database.php.gz',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests a successful major version release upgrade.
-   */
-  public function testBasicMinimalUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Hit the frontpage.
-    $this->drupalGet('');
-    $this->assertResponse(200);
-
-    // Verify that we are still logged in.
-    $this->finishUpgradeSession();
-    $user = new UserSession(array(
-      'uid' => 1,
-      'name' => 'admin',
-      'pass_raw' => 'drupal',
-    ));
-    $this->drupalLogin($user);
-
-    // The previous login should've triggered a password rehash, so login one
-    // more time to make sure the new hash is readable.
-    $this->drupalLogout();
-    $this->drupalLogin($user);
-
-    // Test that the site name is correctly displayed.
-    $this->assertText('drupal', 'The site name is correctly displayed.');
-
-    // Verify that the main admin sections are available.
-    $this->drupalGet('admin');
-    $this->assertText(t('Content'));
-    $this->assertText(t('Appearance'));
-    $this->assertText(t('People'));
-    $this->assertText(t('Configuration'));
-    $this->assertText(t('Reports'));
-    $this->assertText(t('Structure'));
-    $this->assertText(t('Extend'));
-
-    // Confirm that no {menu_links} entry exists for user/autocomplete.
-    $result = db_query('SELECT COUNT(*) FROM {menu_links} WHERE link_path = :user_autocomplete', array(':user_autocomplete' => 'user/autocomplete'))->fetchField();
-    $this->assertFalse($result, 'No {menu_links} entry exists for user/autocomplete');
-
-    // Verify that all required modules are enabled.
-    $enabled = $this->container->get('module_handler')->getModuleList();
-    $required = array_filter(system_rebuild_module_data(), function ($data) {
-      return !empty($data->info['required']);
-    });
-    $this->assertEqual(array_diff_key($required, $enabled), array());
-
-    // Verify that image.module was correctly installed.
-    $this->assertEqual('thumbnail', \Drupal::config('image.style.thumbnail')->get('name'));
-
-    // Make sure that the default mail configuration has been converted.
-    $this->assertEqual(array('default' => 'Drupal\Core\Mail\PhpMail'), \Drupal::config('system.mail')->get('interface'), 'Default mail configuration set.');
-  }
-
-  /**
-   * Asserts that the session was kept during update. Also, log out.
-   */
-  protected function finishUpgradeSession() {
-    $this->drupalGet('user');
-    $this->clickLink(t('Edit'));
-    $this->assertEqual($this->getUrl(), url('user/1/edit', array('absolute' => TRUE)), 'We are still logged in as admin at the end of the upgrade.');
-    $this->drupalLogout();
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareStandardUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareStandardUpgradePathTest.php
deleted file mode 100644
index 37ad031..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/BareStandardUpgradePathTest.php
+++ /dev/null
@@ -1,90 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\BareStandardUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Core\Session\UserSession;
-
-/**
- * Performs major version release upgrade tests on a bare database.
- *
- * Loads an installation of Drupal 7.x and runs the upgrade process on it.
- *
- * The install contains the standard profile (plus all optional) modules
- * without any content so that an update from any of the modules under this
- * profile installation can be wholly tested.
- */
-class BareStandardUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name'  => 'Basic standard + all profile upgrade path, bare database',
-      'description'  => 'Basic upgrade path tests for a standard profile install with all enabled modules and a bare database.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests a successful major version release upgrade.
-   */
-  public function testBasicStandardUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Hit the frontpage.
-    $this->drupalGet('');
-    $this->assertResponse(200);
-
-    // Verify that we are still logged in.
-    $this->drupalGet('user');
-    $this->clickLink(t('Edit'));
-    $this->assertEqual($this->getUrl(), url('user/1/edit', array('absolute' => TRUE)), 'We are still logged in as admin at the end of the upgrade.');
-
-    // Logout and verify that we can login back in with our initial password.
-    $this->drupalLogout();
-    $user = new UserSession(array(
-      'uid' => 1,
-      'name' => 'admin',
-      'pass_raw' => 'drupal',
-    ));
-    $this->drupalLogin($user);
-
-    // The previous login should've triggered a password rehash, so login one
-    // more time to make sure the new hash is readable.
-    $this->drupalLogout();
-    $this->drupalLogin($user);
-
-    // Test that the site name is correctly displayed.
-    $this->assertText('drupal', 'The site name is correctly displayed.');
-
-    // Verify that the main admin sections are available.
-    $this->drupalGet('admin');
-    $this->assertText(t('Content'));
-    $this->assertText(t('Appearance'));
-    $this->assertText(t('People'));
-    $this->assertText(t('Configuration'));
-    $this->assertText(t('Reports'));
-    $this->assertText(t('Structure'));
-    $this->assertText(t('Extend'));
-
-    // Confirm that no {menu_links} entry exists for user/autocomplete.
-    $result = db_query('SELECT COUNT(*) FROM {menu_links} WHERE link_path = :user_autocomplete', array(':user_autocomplete' => 'user/autocomplete'))->fetchField();
-    $this->assertFalse($result, 'No {menu_links} entry exists for user/autocomplete');
-
-    // Verify that the blog node type has been assigned to node module.
-    $blog_type = node_type_load('blog');
-    $this->assertEqual($blog_type->module, 'node', "Content type 'blog' has been reassigned from the blog module to the node module.");
-    $this->assertEqual($blog_type->base, 'node_content', "The base string used to construct callbacks corresponding to content type 'Blog' has been reassigned to 'node_content'.");
-
-  }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/BlockUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/BlockUpgradePathTest.php
deleted file mode 100644
index e1bb4b1..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/BlockUpgradePathTest.php
+++ /dev/null
@@ -1,65 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\BlockUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests upgrading a bare database.
- *
- * Loads a bare installation of Drupal 7 and runs the upgrade process on it.
- */
-class BlockUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Block upgrade test',
-      'description' => 'Upgrade tests with block data.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.minimal.database.php.gz',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests block title length after successful upgrade.
-   */
-  public function testBlockUpgradeTitleLength() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // WebTestBase::drupalPlaceBlock() uses the API directly, which doesn't
-    // output validation errors or success messages, so create the blocks from
-    // the UI.
-
-    // Add a block instance with a 255-character title.
-    // Confirm that the custom block has been created, and title matches input.
-    $settings = array(
-      'settings[label]' => $this->randomName(255),
-      'id' => strtolower($this->randomName(8)),
-      'region' => 'sidebar_first',
-    );
-    $this->drupalPostForm('admin/structure/block/add/system_powered_by_block/' . \Drupal::config('system.theme')->get('default'), $settings, t('Save block'));
-    $this->assertText($settings['settings[label]'], 'Block with title longer than 64 characters successfully created.');
-
-    // Try to add a block with a title over 255 characters.
-    $settings = array(
-      'settings[label]' => $this->randomName(256),
-      'id' => strtolower($this->randomName(8)),
-      'region' => 'sidebar_first',
-    );
-    $this->drupalPostForm('admin/structure/block/add/system_powered_by_block/' . \Drupal::config('system.theme')->get('default'), $settings, t('Save block'));
-
-    // Confirm that the custom block cannot be created with title longer than
-    // the maximum number of characters.
-    $this->assertText('Title cannot be longer than 255 characters');
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/CommentUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/CommentUpgradePathTest.php
deleted file mode 100644
index 1588d6d..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/CommentUpgradePathTest.php
+++ /dev/null
@@ -1,119 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\CommentUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\field\Field;
-
-/**
- * Tests upgrading a filled database with comment data.
- *
- * Loads a filled installation of Drupal 7 with comment data and runs the
- * upgrade process on it.
- */
-class CommentUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name'  => 'Comment upgrade test',
-      'description'  => 'Upgrade tests with comment data.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.filled.standard_all.database.php.gz',
-      // Language dataset includes nodes with comments so can be reused.
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.language.database.php',
-      // Comment dataset sets some settings to values other than the default.
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.comment.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests a successful upgrade.
-   */
-  public function testCommentUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Check that comments display on the node.
-    $this->drupalGet('node/50');
-    $this->assertText('Node title 50', 'Node 50 displayed after update.');
-    $this->assertText('First test comment', 'Comment 1 displayed after update.');
-    $this->assertText('Reply to first test comment', 'Comment 2 displayed after update.');
-
-    $expected_settings = array(
-      'article' => array (
-        'default_mode' => 1,
-        'per_page' => 50,
-        'form_location' => 1,
-        'anonymous' => 0,
-        'subject' => 1,
-        'preview' => 1,
-      ),
-      'blog' => array (
-        'default_mode' => 0,
-        'per_page' => 25,
-        'form_location' => 0,
-        'anonymous' => 1,
-        'subject' => 0,
-        'preview' => 0,
-      ),
-      'book' => array (
-        'default_mode' => 1,
-        'per_page' => 50,
-        'form_location' => 1,
-        'anonymous' => 0,
-        'subject' => 1,
-        'preview' => 1,
-      ),
-      'forum' => array (
-        'default_mode' => 1,
-        'per_page' => 50,
-        'form_location' => 1,
-        'anonymous' => 0,
-        'subject' => 1,
-        'preview' => 1,
-      ),
-      'page' => array (
-        'default_mode' => 1,
-        'per_page' => 50,
-        'form_location' => 1,
-        'anonymous' => 0,
-        'subject' => 1,
-        'preview' => 1,
-      ),
-      // Poll module exists in Drupal 7 and hence will be present during an
-      // upgrade.
-      'poll' => array (
-        'default_mode' => 1,
-        'per_page' => 50,
-        'form_location' => 1,
-        'anonymous' => 0,
-        'subject' => 1,
-        'preview' => 1,
-      ),
-    );
-    // Check one instance exists for each node type.
-    $types = node_type_get_types();
-    $types = array_keys($types);
-    sort($types);
-    $this->assertIdentical(array_keys($expected_settings), $types, 'All node types are upgraded');
-    foreach ($types as $type) {
-      $instance = Field::fieldInfo()->getInstance('node', $type, 'comment_'. $type);
-      $this->assertTrue($instance, format_string('Comment field found for the %type node type', array(
-        '%type' => $type
-      )));
-      $this->assertIdentical($instance->settings, $expected_settings[$type], format_string('Comment field settings migrated for the %type node type', array(
-        '%type' => $type,
-      )));
-    }
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/DateUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/DateUpgradePathTest.php
deleted file mode 100644
index 5e1dd58..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/DateUpgradePathTest.php
+++ /dev/null
@@ -1,100 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains Drupal\system\Tests\Upgrade\DateUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Test upgrade of date formats.
- */
-class DateUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name' => 'Date upgrade test',
-      'description' => 'Upgrade tests for date formats.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.date.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests that date formats have been upgraded.
-   */
-  public function testDateUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Verify standard date formats.
-    $expected_formats['short'] = array(
-      'name' => 'Short',
-      'pattern' => array(
-        'php' => 'm/d/Y - H:i',
-      ),
-      'locked' => '1',
-    );
-    $expected_formats['medium'] = array(
-      'name' => 'Medium',
-      'pattern' => array(
-        'php' => 'D, m/d/Y - H:i',
-      ),
-      'locked' => '1',
-    );
-    $expected_formats['long'] = array(
-      'name' => 'Long',
-      'pattern' => array(
-        'php' => 'l, j F, Y - H:i',
-      ),
-      'locked' => '1',
-    );
-
-    // Verify custom date format.
-    $expected_formats['test_custom'] = array(
-      'name' => 'Test Custom',
-      'pattern' => array(
-        'php' => 'd m Y',
-        ),
-      'locked' => '0',
-    );
-
-    $actual_formats = entity_load_multiple('date_format', array_keys($expected_formats));
-    foreach ($expected_formats as $type => $format) {
-      $format_info = $actual_formats[$type];
-      $this->assertEqual($format_info->label(), $format['name'], format_string('Config value for @type name is the same', array('@type' => $type)));
-      $this->assertEqual($format_info->get('locked'), $format['locked'], format_string('Config value for @type locked is the same', array('@type' => $type)));
-      $this->assertEqual($format_info->getPattern(), $format['pattern']['php'], format_string('Config value for @type PHP date pattern is the same', array('@type' => $type)));
-
-      // Make sure that the variable was deleted.
-      $this->assertNull(update_variable_get('date_format_' . $type), format_string('Date format variable for @type was deleted.', array('@type' => $type)));
-    }
-
-    $expected_de_formats = array(
-      array(
-        'type' => 'long',
-        'format' => 'l, j. F, Y - H:i',
-      ),
-      array(
-        'type' => 'medium',
-        'format' => 'D, d/m/Y - H:i',
-      ),
-      array(
-        'type' => 'short',
-        'format' => 'd/m/Y - H:i',
-      ),
-    );
-
-    foreach ($expected_de_formats as $locale_format) {
-      $format = \Drupal::config('locale.config.de.system.date_format.' . $locale_format['type'])->get('pattern.php');
-      $this->assertEqual($locale_format['format'], $format);
-    }
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ExistingModuleNameLengthUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/ExistingModuleNameLengthUpgradePathTest.php
deleted file mode 100644
index fc9d0e6..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ExistingModuleNameLengthUpgradePathTest.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\ExistingModuleNameLengthUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Core\Database\DatabaseExceptionWrapper;
-
-/**
- * Performs upgrade path tests for module name length related changes.
- */
-class ExistingModuleNameLengthUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name'  => 'Module name length upgrade test (existing module)',
-      'description'  => 'Upgrade path test when there is an installed module with a too long name.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.minimal.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.module_name_length.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Checks that upgrading is not possible when there is a too long module name.
-   */
-  public function testUpgradeAborts() {
-    // Load the first update screen.
-    $this->getUpdatePhp();
-    if (!$this->assertResponse(200)) {
-      throw new \Exception('Initial GET to update.php did not return HTTP 200 status.');
-    }
-
-    $this->assertText('Module name too long');
-    $this->assertNoFieldByXPath('//input[@type="submit"]', 'Not allowed to continue with the update process.');
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/FieldUIUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/FieldUIUpgradePathTest.php
deleted file mode 100644
index 4606d3b..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/FieldUIUpgradePathTest.php
+++ /dev/null
@@ -1,76 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains Drupal\system\Tests\Upgrade\FieldUIUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Test upgrade of Field UI.
- */
-class FieldUIUpgradePathTest extends UpgradePathTestBase {
-
-  protected $normal_role_id = 4;
-  protected $normal_role_name = 'Normal role';
-  protected $admin_role_id = 5;
-  protected $admin_role_name = 'Admin role';
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Field UI upgrade test',
-      'description' => 'Upgrade tests for Field UI.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.filled.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.field_ui.database.php',
-    );
-    parent::setUp();
-  }
-
- /**
-   * Tests Field UI permissions upgrade path.
-   *
-   * Test that after upgrade users who have the 'administer comments',
-   * 'administer content types', 'administer users', and 'administer taxonomy'
-   * permission still have access to the manage field and display screens of
-   * those entities.
-   */
-  function testFieldUIPermissions() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    $permissions = array(
-      'administer comments' => array(
-         'administer comment fields',
-         'administer comment display',
-       ),
-      'administer content types' => array(
-         'administer node fields',
-         'administer node display',
-       ),
-      'administer users' => array(
-         'administer user fields',
-         'administer user display',
-       ),
-      'administer taxonomy' => array(
-         'administer taxonomy_term fields',
-         'administer taxonomy_term display',
-       ),
-    );
-
-    $role_permissions = user_role_permissions(array($this->normal_role_id, $this->admin_role_id));
-    foreach ($permissions as $old_permission => $new_permissions) {
-      $this->assertFalse(in_array($old_permission, $role_permissions[$this->normal_role_id]), format_string('%role_name does not have the old %permission permission', array('%role_name' => $this->normal_role_name, '%permission' => $old_permission)));
-      $this->assertTrue(in_array($old_permission, $role_permissions[$this->admin_role_id]), format_string('%role_name still has the old %permission permission', array('%role_name' => $this->admin_role_name, '%permission' => $old_permission)));
-      foreach ($new_permissions as $new_permission) {
-        $this->assertFalse(in_array($new_permission, $role_permissions[$this->normal_role_id]), format_string('%role_name does not have the new %permission permission', array('%role_name' => $this->normal_role_name, '%permission' => $new_permission)));
-        $this->assertTrue(in_array($new_permission, $role_permissions[$this->admin_role_id]), format_string('%role_name has the new %permission permission', array('%role_name' => $this->admin_role_name, '%permission' => $new_permission)));
-      }
-    }
-  }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/FieldUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/FieldUpgradePathTest.php
deleted file mode 100644
index 76c3b06..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/FieldUpgradePathTest.php
+++ /dev/null
@@ -1,294 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\FieldUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Core\Entity\FieldableDatabaseStorageController;
-use Drupal\field\Entity\Field;
-
-/**
- * Tests upgrade of system variables.
- */
-class FieldUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Field upgrade test',
-      'description' => 'Tests upgrade of Field API.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.field.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests upgrade of entity displays.
-   */
-  public function testEntityDisplayUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Check that the configuration entries were created.
-    $displays = array(
-      'default' => \Drupal::config('entity.display.node.article.default')->get(),
-      'teaser' => \Drupal::config('entity.display.node.article.teaser')->get(),
-    );
-    $this->assertTrue(!empty($displays['default']));
-    $this->assertTrue(!empty($displays['teaser']));
-
-    // Check that the 'body' field is configured as expected.
-    $expected = array(
-      'default' => array(
-        'label' => 'hidden',
-        'type' => 'text_default',
-        'weight' => 0,
-        'settings' => array(),
-      ),
-      'teaser' => array(
-        'label' => 'hidden',
-        'type' => 'text_summary_or_trimmed',
-        'weight' => 0,
-        'settings' => array(
-          'trim_length' => 600,
-        ),
-      ),
-    );
-    $this->assertEqual($displays['default']['content']['body'], $expected['default']);
-    $this->assertEqual($displays['teaser']['content']['body'], $expected['teaser']);
-
-    // Check that the display key in the instance data was removed.
-    $body_instance = field_info_instance('node', 'body', 'article');
-    $this->assertTrue(!isset($body_instance->display));
-
-    // Check that deleted fields were not added to the display.
-    $this->assertFalse(isset($displays['default']['content']['test_deleted_field']));
-    $this->assertFalse(isset($displays['teaser']['content']['test_deleted_field']));
-
-    // Check that the 'language' extra field is configured as expected.
-    $expected = array(
-      'default' => array(
-        'weight' => -1,
-        'visible' => 1,
-      ),
-      'teaser' => array(
-        'visible' => 0,
-      ),
-    );
-    $this->assertEqual($displays['default']['content']['language'], $expected['default']);
-    $this->assertEqual($displays['teaser']['content']['language'], $expected['teaser']);
-  }
-
-  /**
-   * Tests upgrade of entity form displays.
-   */
-  public function testEntityFormDisplayUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Check that the configuration entries were created.
-    $form_display = \Drupal::config('entity.form_display.node.article.default')->get();
-    $this->assertTrue(!empty($form_display));
-
-    // Check that the 'body' field is configured as expected.
-    $expected = array(
-      'type' => 'text_textarea_with_summary',
-      'weight' => -4,
-      'settings' => array(
-        'rows' => '20',
-        'summary_rows' => '5',
-      ),
-    );
-    $this->assertEqual($form_display['content']['body'], $expected);
-
-    // Check that the display key in the instance data was removed.
-    $body_instance = field_info_instance('node', 'body', 'article');
-    $this->assertTrue(!isset($body_instance->widget));
-
-    // Check that deleted fields were not added to the display.
-    $this->assertFalse(isset($form_display['content']['test_deleted_field']));
-
-    // Check that the 'title' extra field is configured as expected.
-    $expected = array(
-      'weight' => -5,
-      'visible' => 1,
-    );
-    $this->assertEqual($form_display['content']['title'], $expected);
-  }
-
-  /**
-   * Tests migration of field and instance definitions to config.
-   */
-  function testFieldUpgradeToConfig() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Check that the configuration for the 'body' field is correct.
-    $config = \Drupal::config('field.field.node.body')->get();
-    // We cannot predict the value of the UUID, we just check it's present.
-    $this->assertFalse(empty($config['uuid']));
-    $field_uuid = $config['uuid'];
-    unset($config['uuid']);
-    $this->assertEqual($config, array(
-      'id' => 'node.body',
-      'name' => 'body',
-      'type' => 'text_with_summary',
-      'module' => 'text',
-      'active' => '1',
-      'entity_type' => 'node',
-      'settings' => array(),
-      'locked' => 0,
-      'cardinality' => 1,
-      'translatable' => 0,
-      'indexes' => array(
-        'format' => array('format')
-      ),
-      'status' => 1,
-      'langcode' => 'und',
-    ));
-
-    // Check that the configuration for the instance on article and page nodes
-    // is correct.
-    foreach (array('article', 'page') as $node_type) {
-      $config = \Drupal::config("field.instance.node.$node_type.body")->get();
-      // We cannot predict the value of the UUID, we just check it's present.
-      $this->assertFalse(empty($config['uuid']));
-      unset($config['uuid']);
-      $this->assertEqual($config, array(
-        'id' => "node.$node_type.body",
-        'field_uuid' => $field_uuid,
-        'field_type' => 'text_with_summary',
-        'entity_type' => 'node',
-        'bundle' => $node_type,
-        'label' => 'Body',
-        'description' => '',
-        'required' => FALSE,
-        'default_value' => array(),
-        'default_value_function' => '',
-        'settings' => array(
-          'display_summary' => TRUE,
-          'text_processing' => 1,
-          // This setting has been removed in field_update_8005(). We keep it
-          // here, commented out, to prove that the upgrade path is working.
-          //'user_register_form' => FALSE,
-        ),
-        'status' => 1,
-        'langcode' => 'und',
-      ));
-    }
-
-    // Check that the field that was shared in two entity types got split into
-    // two separate config entities.
-    $config = \Drupal::config('field.field.node.test_shared_field')->get();
-    // We cannot predict the value of the UUID, we just check it's present.
-    $this->assertFalse(empty($config['uuid']));
-    $field_uuid_node = $config['uuid'];
-    unset($config['uuid']);
-    $this->assertEqual($config, array(
-      'id' => 'node.test_shared_field',
-      'name' => 'test_shared_field',
-      'type' => 'text',
-      'module' => 'text',
-      'active' => '1',
-      'entity_type' => 'node',
-      'settings' => array(
-        'max_length' => '255',
-      ),
-      'locked' => 0,
-      'cardinality' => 1,
-      'translatable' => 0,
-      'indexes' => array(
-        'format' => array('format')
-      ),
-      'status' => 1,
-      'langcode' => 'und',
-    ));
-    $config = \Drupal::config('field.field.user.test_shared_field')->get();
-    // We cannot predict the value of the UUID, we just check it's present.
-    $this->assertFalse(empty($config['uuid']));
-    $field_uuid_user = $config['uuid'];
-    unset($config['uuid']);
-    $this->assertEqual($config, array(
-      'id' => 'user.test_shared_field',
-      'name' => 'test_shared_field',
-      'type' => 'text',
-      'module' => 'text',
-      'active' => '1',
-      'entity_type' => 'user',
-      'settings' => array(
-        'max_length' => '255',
-      ),
-      'locked' => 0,
-      'cardinality' => 1,
-      'translatable' => 0,
-      'indexes' => array(
-        'format' => array('format')
-      ),
-      'status' => 1,
-      'langcode' => 'und',
-    ));
-
-    // Check that the corresponding instances point to the correct field UUIDs.
-    $config = \Drupal::config('field.instance.node.article.test_shared_field')->get();
-    $this->assertEqual($config['field_uuid'], $field_uuid_node);
-    $config = \Drupal::config('field.instance.user.user.test_shared_field')->get();
-    $this->assertEqual($config['field_uuid'], $field_uuid_user);
-
-    // Check that field values in the pre-existing node are read correctly.
-    $node = node_load(1);
-    $this->assertEqual($node->body->value, 'Some value');
-    $this->assertEqual($node->body->summary, 'Some summary');
-    $this->assertEqual($node->body->format, 'filtered_html');
-    $this->assertEqual($node->test_shared_field->value, 'Shared field: value for node 1');
-    $this->assertEqual($node->test_shared_field->format, 'filtered_html');
-    // Check that field values in the pre-existing user are read correctly.
-    $account = user_load(1);
-    $this->assertEqual($account->test_shared_field->value, 'Shared field: value for user 1');
-    $this->assertEqual($account->test_shared_field->format, 'filtered_html');
-
-    // Check that the definition of a deleted field is stored in state rather
-    // than config.
-    $this->assertFalse(\Drupal::config('field.field.test_deleted_field')->get());
-    // The array is keyed by UUID. We cannot predict the UUID of the
-    // 'test_deleted_field' field, but assume there was only one deleted field
-    // in the test database.
-    $deleted_fields = \Drupal::state()->get('field.field.deleted');
-    $uuid_key = key($deleted_fields);
-    $deleted_field = $deleted_fields[$uuid_key];
-    $this->assertEqual($deleted_field['uuid'], $uuid_key);
-    $this->assertEqual($deleted_field['id'], 'node.test_deleted_field');
-
-    // Check that the definition of a deleted instance is stored in state rather
-    // than config.
-    $this->assertFalse(\Drupal::config('field.instance.node.article.test_deleted_field')->get());
-    $deleted_instances = \Drupal::state()->get('field.instance.deleted');
-    // Assume there was only one deleted instance in the test database.
-    $uuid_key = key($deleted_instances);
-    $deleted_instance = $deleted_instances[$uuid_key];
-    $this->assertEqual($deleted_instance['uuid'], $uuid_key);
-    $this->assertEqual($deleted_instance['id'], 'node.article.test_deleted_field');
-    // The deleted field uuid and deleted instance field_uuid must match.
-    $this->assertEqual($deleted_field['uuid'], $deleted_instance['field_uuid']);
-
-    // Check that pre-existing deleted field table is renamed correctly.
-    $field_entity = new Field($deleted_field);
-    $table_name = FieldableDatabaseStorageController::_fieldTableName($field_entity);
-    $this->assertEqual("field_deleted_data_" . substr(hash('sha256', $deleted_field['uuid']), 0, 10), $table_name);
-    $this->assertTrue(db_table_exists($table_name));
-
-    // Check that creation of a new node works as expected.
-    $value = $this->randomName();
-    $edit = array(
-      'title' => 'Node after CMI conversion',
-      'body[0][value]' => $value,
-    );
-    $this->drupalPostForm('node/add/article', $edit, 'Save and publish');
-    $this->assertText($value);
-  }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/FilledMinimalUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/FilledMinimalUpgradePathTest.php
deleted file mode 100644
index 86d2b10..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/FilledMinimalUpgradePathTest.php
+++ /dev/null
@@ -1,83 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\FilledMinimalUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Core\Session\UserSession;
-
-/**
- * Performs major version release upgrade tests on a populated database.
- *
- * Loads an installation of Drupal 7.x and runs the upgrade process on it.
- *
- * The install contains the minimal profile modules (along with generated
- * content) so that an update from of a site under this profile may be tested.
- */
-class FilledMinimalUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name'  => 'Basic minimal profile upgrade path, populated database',
-      'description'  => 'Basic upgrade path tests for a minimal profile install with a populated database.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.filled.minimal.database.php.gz',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests a successful point release update.
-   */
-  public function testFilledMinimalUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Hit the frontpage.
-    $this->drupalGet('');
-    $this->assertResponse(200);
-
-    // Verify that we are still logged in.
-    $this->drupalGet('user');
-    $this->clickLink(t('Edit'));
-    $this->assertEqual($this->getUrl(), url('user/1/edit', array('absolute' => TRUE)), 'We are still logged in as admin at the end of the upgrade.');
-
-    // Logout and verify that we can login back in with our initial password.
-    $this->drupalLogout();
-    $user = new UserSession(array(
-      'uid' => 1,
-      'name' => 'admin',
-      'pass_raw' => 'drupal',
-    ));
-    $this->drupalLogin($user);
-
-    // The previous login should've triggered a password rehash, so login one
-    // more time to make sure the new hash is readable.
-    $this->drupalLogout();
-    $this->drupalLogin($user);
-
-    // Test that the site name is correctly displayed.
-    $this->assertText('drupal', 'The site name is correctly displayed.');
-
-    // Verify that the main admin sections are available.
-    $this->drupalGet('admin');
-    $this->assertText(t('Content'));
-    $this->assertText(t('Appearance'));
-    $this->assertText(t('People'));
-    $this->assertText(t('Configuration'));
-    $this->assertText(t('Reports'));
-    $this->assertText(t('Structure'));
-    $this->assertText(t('Extend'));
-
-    // Confirm that no {menu_links} entry exists for user/autocomplete.
-    $result = db_query('SELECT COUNT(*) FROM {menu_links} WHERE link_path = :user_autocomplete', array(':user_autocomplete' => 'user/autocomplete'))->fetchField();
-    $this->assertFalse($result, 'No {menu_links} entry exists for user/autocomplete');
-  }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/FilledStandardUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/FilledStandardUpgradePathTest.php
deleted file mode 100644
index 7457533..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/FilledStandardUpgradePathTest.php
+++ /dev/null
@@ -1,136 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\FilledStandardUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Core\Session\UserSession;
-
-/**
- * Performs major version release upgrade tests on a populated database.
- *
- * Loads an installation of Drupal 7.x and runs the upgrade process on it.
- *
- * The install contains the standard profile (plus all optional) modules
- * with generated content so that an update from any of the modules under this
- * profile installation can be wholly tested.
- */
-class FilledStandardUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name'  => 'Basic standard + all profile upgrade path, populated database',
-      'description'  => 'Basic upgrade path tests for a standard profile install with all enabled modules and a populated database.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.filled.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.user_data.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests a successful point release update.
-   */
-  public function testFilledStandardUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Hit the frontpage.
-    $this->drupalGet('');
-    $this->assertResponse(200);
-
-    // Verify that the former Navigation system menu block appears as Tools.
-    // @todo Blocks are not being upgraded.
-    //   $this->assertText(t('Tools'));
-
-    // Verify that the Account menu still appears as secondary links source.
-    $this->assertText(t('My account'));
-    $this->assertText(t('Log out'));
-
-    // Verify the the Main menu still appears as primary links source.
-    $this->assertLink(t('Home'));
-
-    // Verify that we are still logged in.
-    $this->drupalGet('user');
-    $this->clickLink(t('Edit'));
-    $this->assertEqual($this->getUrl(), url('user/1/edit', array('absolute' => TRUE)), 'We are still logged in as admin at the end of the upgrade.');
-
-    // Logout and verify that we can login back in with our initial password.
-    $this->drupalLogout();
-    $user = new UserSession(array(
-      'uid' => 1,
-      'name' => 'admin',
-      'pass_raw' => 'drupal',
-    ));
-    $this->drupalLogin($user);
-
-    // The previous login should've triggered a password rehash, so login one
-    // more time to make sure the new hash is readable.
-    $this->drupalLogout();
-    $this->drupalLogin($user);
-
-    // Test that the site name is correctly displayed.
-    $this->assertText('drupal', 'The site name is correctly displayed.');
-
-    // Verify that the main admin sections are available.
-    $this->drupalGet('admin');
-    $this->assertText(t('Content'));
-    $this->assertText(t('Appearance'));
-    $this->assertText(t('People'));
-    $this->assertText(t('Configuration'));
-    $this->assertText(t('Reports'));
-    $this->assertText(t('Structure'));
-    $this->assertText(t('Extend'));
-
-    // Confirm that no {menu_links} entry exists for user/autocomplete.
-    $result = db_query('SELECT COUNT(*) FROM {menu_links} WHERE link_path = :user_autocomplete', array(':user_autocomplete' => 'user/autocomplete'))->fetchField();
-    $this->assertFalse($result, 'No {menu_links} entry exists for user/autocomplete');
-
-    // Verify that the blog node type has been assigned to node module.
-    $node_type = entity_load('node_type', 'blog');
-    $this->assertFalse($node_type->isLocked(), "Content type 'blog' has been reassigned from the blog module to the node module.");
-    $node_type = entity_load('node_type', 'forum');
-    $this->assertTrue($node_type->isLocked(), "The base string used to construct callbacks corresponding to content type 'Forum' has been reassigned to forum module.");
-
-    // Each entity type has a 'full' view mode, ensure it was migrated.
-    $all_view_modes = entity_get_view_modes();
-    $this->assertTrue(!empty($all_view_modes), 'The view modes have been migrated.');
-    foreach ($all_view_modes as $entity_view_modes) {
-      $this->assertTrue(isset($entity_view_modes['full']));
-    }
-
-    // Ensure that taxonomy terms have a 'changed' timestamp.
-    $term = entity_load('taxonomy_term', 1);
-    $this->assertNotEqual($term->getChangedTime(), 0);
-
-    // Check that user data has been migrated correctly.
-    $query = db_query('SELECT * FROM {users_data}');
-
-    $userdata = array();
-    $i = 0;
-    foreach ($query as $row) {
-      $i++;
-      $userdata[$row->uid][$row->module][$row->name] = $row;
-    }
-    // Check that the correct amount of rows exist.
-    $this->assertEqual($i, 5);
-    // Check that the data has been converted correctly.
-    $this->assertEqual(unserialize($userdata[1]['contact']['enabled']->value), 1);
-    $this->assertEqual($userdata[1]['contact']['enabled']->serialized, 1);
-    $this->assertEqual(unserialize($userdata[2]['contact']['enabled']->value), 0);
-    $this->assertEqual(unserialize($userdata[1]['overlay']['enabled']->value), 1);
-    $this->assertEqual(unserialize($userdata[2]['overlay']['enabled']->value), 1);
-    $this->assertEqual(unserialize($userdata[1]['overlay']['message_dismissed']->value), 1);
-    $this->assertFalse(isset($userdata[2]['overlay']['message_dismissed']));
-
-    // Make sure that only the garbage is remaining in the helper table.
-    $this->assertEqual(db_query('SELECT COUNT(*) FROM {_d7_users_data}')->fetchField(), 2);
-  }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/FilterFormatUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/FilterFormatUpgradePathTest.php
deleted file mode 100644
index 9c472ff..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/FilterFormatUpgradePathTest.php
+++ /dev/null
@@ -1,93 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\FilterFormatUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests upgrading a bare database with user filter format data.
- *
- * Loads a bare installation of Drupal 7 with filter format data and runs the
- * upgrade process on it. Tests for the conversion filter formats into
- * configurables.
- */
-class FilterFormatUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Filter Formats upgrade test',
-      'description' => 'Upgrade tests with filter formats data.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $path = drupal_get_path('module', 'system');
-    $this->databaseDumpFiles = array(
-      $path . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      $path . '/tests/upgrade/drupal-7.roles.database.php',
-      $path . '/tests/upgrade/drupal-7.filter_formats.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests expected filter formats entities after a successful upgrade.
-   */
-  public function testFilterFormatUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Checks that all the formats were upgraded
-    $one = entity_load('filter_format', 'format_one');
-    $this->assertTrue(!empty($one), 'Filter Format one was successfully upgraded');
-    $two = entity_load('filter_format', 'format_two');
-    $this->assertTrue(!empty($two), 'Filter Format two was successfully upgraded');
-
-    // Filter format 'Three' is disabled.
-    $three_entity = entity_load('filter_format', 'format_three');
-    $this->assertFalse($three_entity->status(), 'Filter Format three was successfully upgraded and it is disabled');
-
-    // Check the access to the text formats.
-
-    // Check that the anonymous user role ID has been converted from "1" to
-    // "anonymous" and text formats permissions were updated.
-    $this->drupalGet('admin/people/permissions');
-    $this->assertFieldChecked('edit-anonymous-use-text-format-format-one', 'Use text format format_one permission for "anonymous" is set correctly.');
-    $this->assertNoFieldChecked('edit-anonymous-use-text-format-format-two', 'Use text format format_two permission for "anonymous" is set correctly.');
-
-    // Check that the anonymous user role ID has been converted from "2" to
-    // "authenticated" and text formats permissions were updated.
-    $this->assertNoFieldChecked('edit-authenticated-use-text-format-format-one', 'Use text format format_one permission for "authenticated" is set correctly.');
-    $this->assertFieldChecked('edit-authenticated-use-text-format-format-two', 'Use text format format_two permission for "authenticated" is set correctly.');
-
-    // Check that the permission for "gärtner" still exists and text formats
-    // permissions were updated.
-    $this->assertFieldChecked('edit-4-use-text-format-format-one', 'Use text format format_one permission for role is set correctly.');
-    $this->assertNoFieldChecked('edit-4-use-text-format-format-two', 'Use text format format_two permission for role is set correctly.');
-
-    // Check that role 5 cannot access to the defined text formats
-    $this->assertNoFieldChecked('edit-5-use-text-format-format-one', 'Use text format format_one permission for role is set correctly.');
-    $this->assertNoFieldChecked('edit-5-use-text-format-format-two', 'Use text format format_two permission for role is set correctly.');
-
-    // Check that the format has the missing filter.
-    $two = entity_load('filter_format', 'format_two');
-    $this->assertTrue($two->filters()->has('missing_filter'));
-
-    // Try to use a filter format with a missing filter, this should not throw
-    // an exception.
-    $empty_markup = check_markup($this->randomName(), 'format_two');
-    $this->assertIdentical($empty_markup, '', 'The filtered text is empty while a filter is missing.');
-
-    // Editing and saving the format should drop the missing filter.
-    $this->drupalGet('admin/config/content/formats/manage/format_two');
-    $this->assertRaw(t('The %filter filter is missing, and will be removed once this format is saved.', array('%filter' => 'missing_filter')));
-    $this->drupalPostForm(NULL, array(), t('Save configuration'));
-    filter_formats_reset();
-    $two = entity_load('filter_format', 'format_two');
-    $this->assertFalse($two->filters()->has('missing_filter'));
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ForumUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/ForumUpgradePathTest.php
deleted file mode 100644
index 5edc67c..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ForumUpgradePathTest.php
+++ /dev/null
@@ -1,56 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\ForumUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests upgrading a filled database with forum data.
- *
- * Loads a filled installation of Drupal 7 with forums and containers and runs
- * the upgrade process on it.
- */
-class ForumUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name'  => 'Forum upgrade test',
-      'description'  => 'Upgrade tests with forum data.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $path = drupal_get_path('module', 'system') . '/tests/upgrade';
-    $this->databaseDumpFiles = array(
-      $path . '/drupal-7.bare.standard_all.database.php.gz',
-      $path . '/drupal-7.forum.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests expected forum and container conversions after a successful upgrade.
-   */
-  public function testForumUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Make sure the field is created.
-    $vocabulary = $this->container->get('config.factory')->get('forum.settings')->get('vocabulary');
-    $field = field_info_instance('taxonomy_term', 'forum_container', $vocabulary);
-    $this->assertTrue((bool) $field, 'Field was found');
-
-    // Check that the values of forum_container are correct.
-    $containers = entity_load_multiple_by_properties('taxonomy_term', array('name' => 'Container'));
-    $container = reset($containers);
-    $this->assertTrue((bool) $container->forum_container->value);
-
-    $forums = entity_load_multiple_by_properties('taxonomy_term', array('name' => 'Forum'));
-    $forum = reset($forums);
-    $this->assertFalse((bool) $forum->forum_container->value);
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ImageUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/ImageUpgradePathTest.php
deleted file mode 100644
index 7d742a7..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ImageUpgradePathTest.php
+++ /dev/null
@@ -1,185 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\ImageUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Component\Utility\String;
-
-/**
- * Test upgrade of overridden and custom image styles.
- */
-class ImageUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name' => 'Image upgrade test',
-      'description' => 'Upgrade tests for overridden and custom image styles.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.image.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests that custom and overridden image styles have been upgraded.
-   */
-  public function testImageStyleUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // A custom user image style.
-    $expected_styles['test-custom'] = array(
-      'name' => 'test-custom',
-      'label' => 'Test custom',
-      'status' => '1',
-      'langcode' => 'en',
-      'effects' => array(
-        'image_rotate' => array(
-          'id' => 'image_rotate',
-          'data' => array(
-            'degrees' => '90',
-            'bgcolor' => '#FFFFFF',
-            'random' => '1',
-          ),
-          'weight' => '1',
-        ),
-        'image_desaturate' => array(
-          'id' => 'image_desaturate',
-          'data' => array(),
-          'weight' => '2',
-        ),
-      ),
-    );
-    // An image style shipped with Drupal 7 but overwritten by the user.
-    $expected_styles['thumbnail'] = array(
-      'name' => 'thumbnail',
-      'label' => 'Thumbnail (100x100)',
-      'status' => '1',
-      'langcode' => 'en',
-      'effects' => array (
-        'image_scale' => array(
-          'id' => 'image_scale',
-          'data' => array (
-            'width' => '177',
-            'height' => '177',
-            'upscale' => '0',
-          ),
-          'weight' => '0',
-        ),
-      ),
-    );
-    // A non-overwritten image style. Has to be imported in Drupal 8 as well.
-    $expected_styles['large'] = array(
-      'name' => 'large',
-      'label' => 'Large (480x480)',
-      'status' => '1',
-      'langcode' => 'en',
-      'effects' => array (
-        'image_scale' => array(
-          'id' => 'image_scale',
-          'data' => array (
-            'width' => '480',
-            'height' => '480',
-            'upscale' => '0',
-          ),
-          'weight' => '0',
-        ),
-      ),
-    );
-    $config_factory = $this->container->get('config.factory');
-    foreach ($expected_styles as $name => $style) {
-      $configured_style = $config_factory->get('image.style.' . $name)->get();
-
-      // Maybe the image style hasn't been imported?
-      $imported = !empty($configured_style);
-      $this->assertTrue($imported, String::format('%name has been imported', array('%name' => $style['label'])));
-      if (!$imported) {
-        continue;
-      }
-
-      // Replace placeholder with image effect name keys with UUID's generated
-      // during by the image style upgrade functions.
-      foreach ($configured_style['effects'] as $uuid => $effect) {
-        // Copy placeholder data.
-        $style['effects'][$uuid] = $style['effects'][$effect['id']];
-        // Set the missing uuid key as this is unknown because it is a UUID.
-        $style['effects'][$uuid]['uuid'] = $uuid;
-        // Remove the placeholder data.
-        unset($style['effects'][$effect['id']]);
-      }
-      // Make sure UUID assigned to new style.
-      $this->assertTrue($configured_style['uuid'], 'UUID assigned to converted style.');
-      // Copy generated UUID to compared style.
-      $style['uuid'] = $configured_style['uuid'];
-      $this->assertEqual($this->sortByKey($style), $this->sortByKey($configured_style));
-    }
-  }
-
-  /**
-   * Sorts all keys in configuration data.
-   *
-   * Since we can not be sure of the order of the UUID's generated by
-   * _image_update_get_style_with_effects() we need to sort the data in order
-   * to compare it with data saved in the config system.
-   *
-   * @param array $data
-   *   An associative array to sort recursively by key name.
-   *
-   * @return array
-   *   A sorted array.
-   */
-  public function sortByKey(array $data) {
-    ksort($data);
-    foreach ($data as &$value) {
-      if (is_array($value)) {
-        $value = $this->sortByKey($value);
-      }
-    }
-    return $data;
-  }
-
-  /**
-   * Tests if the field and instance setting 'default_image' has been
-   * successfully converted from an integer to an associative array.
-   */
-  public function testImageFieldDefaultImageUpgrade() {
-    // Perform upgrade.
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // While this test is testing the upgrade path against a Drupal 7 'standard'
-    // profile installation we assume that node bundle 'article', having the
-    // 'field_image' image field, is installed too.
-    $cases = array('field.field.node.field_image', 'field.instance.node.article.field_image');
-    foreach ($cases as $case) {
-      $default_image = \Drupal::config($case)->get('settings.default_image');
-
-      // Check is was converted to an array.
-      $this->assertTrue(is_array($default_image));
-
-      // Check if 'default_image' contains a key named 'fid'. It might be an
-      // integer or NULL.
-      $this->assertTrue(array_key_exists('fid', $default_image));
-
-      // Check if 'alt' key exists and is a string.
-      $this->assertTrue(isset($default_image['alt']) && is_string($default_image['alt']));
-
-      // Check if 'title' key exists and is a string.
-      $this->assertTrue(isset($default_image['title']) && is_string($default_image['title']));
-
-      // Check if 'width' key exists. It might be an integer or NULL.
-      $this->assertTrue(array_key_exists('width', $default_image));
-
-      // Check if 'height' key exists. It might be an integer or NULL.
-      $this->assertTrue(array_key_exists('height', $default_image));
-    }
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/LanguageUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/LanguageUpgradePathTest.php
deleted file mode 100644
index df27013..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/LanguageUpgradePathTest.php
+++ /dev/null
@@ -1,196 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\LanguageUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Core\Database\DatabaseException;
-
-use Drupal\Core\Language\Language;
-
-/**
- * Tests upgrading a filled database with language data.
- *
- * Loads a filled installation of Drupal 7 with language data and runs the
- * upgrade process on it.
- */
-class LanguageUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name'  => 'Language upgrade test',
-      'description'  => 'Upgrade tests with language data.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.filled.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.language.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests a successful upgrade.
-   */
-  public function testLanguageUpgrade() {
-    db_update('users')->fields(array('language' => 'ca'))->condition('uid', '1')->execute();
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Check that the configuration for the 'Catalan' language is correct.
-    $config = $this->container->get('config.factory')->get('language.entity.ca')->get();
-    // We cannot predict the value of the UUID, we just check it's present.
-    $this->assertFalse(empty($config['uuid']));
-    unset($config['uuid']);
-    $this->assertEqual($config, array(
-      'id' => 'ca',
-      'label' => 'Catalan',
-      'direction' => 0,
-      'weight' => 0,
-      'locked' => 0,
-      'langcode' => 'en',
-    ));
-
-    // Ensure Catalan was properly upgraded to be the new default language.
-    $this->assertTrue(language_default()->id == 'ca', 'Catalan is the default language');
-    $languages = language_list(Language::STATE_ALL);
-    foreach ($languages as $language) {
-      $this->assertTrue($language->default == ($language->id == 'ca'), format_string('@language default property properly set', array('@language' => $language->name)));
-    }
-
-    // Check that both comments display on the node.
-    $this->drupalGet('node/50');
-    $this->assertText('Node title 50', 'Node 50 displayed after update.');
-    $this->assertText('First test comment', 'Comment 1 displayed after update.');
-    $this->assertText('Reply to first test comment', 'Comment 2 displayed after update.');
-
-    // Directly check the comment language property on the first comment.
-    $comment = db_query('SELECT * FROM {comment} WHERE cid = :cid', array(':cid' => 1))->fetchObject();
-    $this->assertTrue($comment->langcode == 'und', 'Comment 1 language code found.');
-
-    // Ensure that the language switcher has been correctly upgraded. We need to
-    // assert the expected HTML id because the block might appear even if the
-    // language negotiation settings are not properly upgraded.
-    // @todo Blocks are not being upgraded.
-    //   $this->assertTrue($this->xpath('//div[@id="block-language-language-interface"]'), 'The language switcher block is being correctly showed.');
-
-    // Test that the 'language' property was properly renamed to 'langcode'.
-    $language_none_nid = 50;
-    $spanish_nid = 51;
-    // Check directly for the node langcode.
-    $this->assertEqual(node_load($language_none_nid)->language()->id, Language::LANGCODE_NOT_SPECIFIED, "'language' property was renamed to 'langcode' for Language::LANGCODE_NOT_SPECIFIED node.");
-    $this->assertEqual(node_load($spanish_nid)->language()->id, 'ca', "'language' property was renamed to 'langcode' for Catalan node.");
-
-    // Check for node content type settings upgrade.
-    $this->drupalGet('node/add/article');
-    $this->assertField('langcode', 'There is a language selector.');
-    $this->drupalGet('node/add/page');
-    $this->assertNoField('langcode', 'There is no language selector.');
-
-    // Check that the user language value was retained in both langcode and
-    // preferred_langcode.
-    $user = db_query('SELECT * FROM {users} WHERE uid = :uid', array(':uid' => 1))->fetchObject();
-    $this->assertEqual($user->langcode, 'ca');
-    $this->assertEqual($user->preferred_langcode, 'ca');
-
-    // A langcode property was added to vocabularies and terms. Check that
-    // existing vocabularies and terms got assigned the site default language.
-    $vocabulary = entity_load('taxonomy_vocabulary', 'tags');
-    $this->assertEqual($vocabulary->langcode, 'ca');
-    $term = db_query('SELECT * FROM {taxonomy_term_data} WHERE tid = :tid', array(':tid' => 1))->fetchObject();
-    $this->assertEqual($term->langcode, 'ca');
-
-    // A langcode property was added to files. Check that existing files got
-    // assigned Language::LANGCODE_NOT_SPECIFIED.
-    $file = db_query('SELECT * FROM {file_managed} WHERE fid = :fid', array(':fid' => 1))->fetchObject();
-    $this->assertEqual($file->langcode, Language::LANGCODE_NOT_SPECIFIED);
-
-    // Check if language negotiation weights were renamed properly. This is a
-    // reproduction of the previous weights from the dump.
-    $expected_weights = array(
-      'language-url' => '-8',
-      'language-session' => '-6',
-      'language-user' => '-4',
-      'language-browser' => '-2',
-      'language-selected' => '10',
-    );
-    // Check that locale_language_providers_weight_language is correctly
-    // renamed.
-    $current_weights = update_variable_get('language_negotiation_methods_weight_language_interface', array());
-    $this->assertTrue(serialize($expected_weights) == serialize($current_weights), 'Language negotiation method weights upgraded.');
-    $this->assertTrue(isset($current_weights['language-selected']), 'Language-selected is present.');
-    $this->assertFalse(isset($current_weights['language-default']), 'Language-default is not present.');
-
-    // @todo We only need language.inc here because LANGUAGE_NEGOTIATION_SELECTED
-    //   is defined there. Remove this line once that has been converted to a class
-    //   constant.
-    require_once DRUPAL_ROOT . '/core/includes/language.inc';
-
-    // Check that negotiation callback was added to language_negotiation_language_interface.
-    $language_negotiation_language_interface = update_variable_get('language_negotiation_language_interface', NULL);
-    $this->assertTrue(isset($language_negotiation_language_interface[LANGUAGE_NEGOTIATION_SELECTED]['callbacks']['negotiation']), 'Negotiation callback was added to language_negotiation_language_interface.');
-
-    // Look up migrated plural string.
-    $source_string = db_query('SELECT * FROM {locales_source} WHERE lid = 22')->fetchObject();
-    $this->assertEqual($source_string->source, implode(LOCALE_PLURAL_DELIMITER, array('1 byte', '@count bytes')));
-
-    $translation_string = db_query("SELECT * FROM {locales_target} WHERE lid = 22 AND language = 'hr'")->fetchObject();
-    $this->assertEqual($translation_string->translation, implode(LOCALE_PLURAL_DELIMITER, array('@count bajt', '@count bajta', '@count bajtova')));
-    $this->assertTrue(!isset($translation_string->plural), 'Chained plural indicator removed.');
-    $this->assertTrue(!isset($translation_string->plid), 'Chained plural indicator removed.');
-
-    $source_string = db_query('SELECT * FROM {locales_source} WHERE lid IN (23, 24)')->fetchObject();
-    $this->assertTrue(empty($source_string), 'Individual plural variant source removed');
-    $translation_string = db_query("SELECT * FROM {locales_target} WHERE lid IN (23, 24)")->fetchObject();
-    $this->assertTrue(empty($translation_string), 'Individual plural variant translation removed');
-
-    $translation_string = db_query("SELECT * FROM {locales_target} WHERE lid = 22 AND language = 'ca'")->fetchObject();
-    $this->assertEqual($translation_string->translation, implode(LOCALE_PLURAL_DELIMITER, array('1 byte', '@count bytes')));
-
-    // Ensure that re-indexing search for a specific language does not fail. It
-    // does not matter if the sid exists on not. This tests whether or not
-    // search_update_8001() has added the langcode fields.
-    try {
-      search_reindex(1, 'node', FALSE, 'ca');
-      $this->pass("Calling search_reindex succeeds after upgrade.");
-    }
-    catch (DatabaseException $e) {
-      $this->fail("Calling search_reindex fails after upgrade.");
-    }
-  }
-
-  /**
-   * Tests language domain upgrade path.
-   */
-  public function testLanguageUrlUpgrade() {
-    $language_domain = 'ca.example.com';
-    db_update('languages')->fields(array('domain' => 'http://' . $language_domain . ':8888'))->condition('language', 'ca')->execute();
-    $this->variable_set('locale_language_negotiation_url_part', 1);
-
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    language_negotiation_include();
-    $domains = language_negotiation_url_domains();
-    $this->assertTrue($domains['ca'] == $language_domain, 'Language domain for Catalan properly upgraded.');
-  }
-
-  /**
-   * Tests upgrading translations without plurals.
-   */
-  public function testLanguageNoPluralsUpgrade() {
-    // Remove all plural translations from the database.
-    db_delete('locales_target')->condition('plural', 0, '<>')->execute();
-
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Check if locale_update_8005() is succesfully completed by checking
-    // whether index 'plural' has been removed.
-    $this->assertFalse(db_index_exists('locales_target', 'plural'), 'Translations without plurals upgraded.');
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/MailUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/MailUpgradePathTest.php
deleted file mode 100644
index 417f41e..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/MailUpgradePathTest.php
+++ /dev/null
@@ -1,55 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\MailUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests upgrade of mail backend system variables.
- */
-class MailUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Mail upgrade test',
-      'description' => 'Tests upgrade of Mail backend configuration.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.system.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests that mail backends are upgraded to their Drupal 8 equivalents.
-   */
-  public function testMailSystemUpgrade() {
-    $this->performUpgrade(TRUE);
-
-    // Get the new mailer definitions.
-    $mail_system = \Drupal::config('system.mail')->get('interface');
-
-    // Check that the default mailer has been changed to a PSR-0 definition.
-    $this->assertEqual($mail_system['default'], 'Drupal\Core\Mail\PhpMail', 'Default mailer upgraded to Drupal 8 syntax.');
-
-    // Check that a custom mailer has been preserved through the upgrade.
-    $this->assertEqual($mail_system['maillog'], 'MaillogMailSystem', 'Custom mail backend preserved during upgrade.');
-  }
-
-  /**
-   * Overrides UpgradePathTestBase::checkCompletionPage().
-   */
-  protected function checkCompletionPage() {
-    // Ensure the user is informed about mail backends that need updating.
-    $this->assertText('The following mail backends need to be re-configured: MaillogMailSystem.', 'User notified about outdated mail backends.');
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ModuleNameLengthUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/ModuleNameLengthUpgradePathTest.php
deleted file mode 100644
index 9525d6f..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ModuleNameLengthUpgradePathTest.php
+++ /dev/null
@@ -1,57 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\ModuleNameLengthUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Core\Database\DatabaseExceptionWrapper;
-
-/**
- * Performs upgrade path tests for module name length related changes.
- */
-class ModuleNameLengthUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name'  => 'Module name length upgrade test',
-      'description'  => 'Upgrade path tests for module name length related changes.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.minimal.database.php.gz',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Performs upgrade path tests for module name length related changes.
-   */
-  public function testModuleNameLengths() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Make sure that the module colums where shortened.
-    try {
-      db_insert('file_usage')
-        ->fields(array(
-          'fid' => 2,
-          'module' => str_repeat('b', 51),
-          'type' => $this->randomName(),
-          'id' => $this->randomName(),
-          'count' => 1,
-        ))
-        ->execute();
-      $this->fail('Length of {file_usage}.module successfully updated.');
-    }
-    catch (DatabaseExceptionWrapper $e) {
-      $this->pass('Length of {file_usage}.module successfully updated.');
-    }
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ModulesDisabledUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/ModulesDisabledUpgradePathTest.php
deleted file mode 100644
index 0db46df..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ModulesDisabledUpgradePathTest.php
+++ /dev/null
@@ -1,54 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\ModulesDisabledUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests upgrading with all non-required modules installed but disabled.
- *
- * Loads a filled installation of Drupal 7 with disabled modules and runs the
- * upgrade process on it.
- */
-class ModulesDisabledUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name'  => 'Modules disabled upgrade test',
-      'description'  => 'Upgrade path test for disabled modules.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.filled.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.all-disabled.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests an upgrade with all non-required modules installed but disabled.
-   */
-  public function testDisabledUpgrade() {
-    $modules = db_query('SELECT name, info FROM {system} WHERE type = :module AND status = 0 AND schema_version <> :schema_uninstalled', array(
-      ':module' => 'module',
-      ':schema_uninstalled' => SCHEMA_UNINSTALLED,
-    ))->fetchAllKeyed(0, 1);
-    array_walk($modules, function (&$value, $key) {
-      $info = unserialize($value);
-      $value = $info['name'];
-    });
-    // Load the first update screen.
-    $this->getUpdatePhp();
-    if (!$this->assertResponse(200)) {
-      throw new \Exception('Initial GET to update.php did not return HTTP 200 status.');
-    }
-    $this->assertNoFieldByXPath('//input[@type="submit"]', NULL, 'No continue button found on update.php.');
-    $this->assertText('Drupal 8 no longer supports disabled modules. Please either enable or uninstall them before upgrading.');
-    $this->assertText(implode(', ', $modules));
-  }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ShortcutUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/ShortcutUpgradePathTest.php
deleted file mode 100644
index 87f7f84..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/ShortcutUpgradePathTest.php
+++ /dev/null
@@ -1,55 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\system\Tests\Upgrade\ShortcutUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\system\Tests\Upgrade\UpgradePathTestBase;
-
-/**
- * Tests upgrade of shortcut.
- */
-class ShortcutUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Shortcut upgrade test',
-      'description' => 'Tests upgrade of shortcut to the configuration system.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.shortcut.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests upgrade of {shortcut_set} table to configuration entities.
-   */
-  public function testContactUpgrade() {
-    $this->assertTrue(db_table_exists('shortcut_set'), 'Table {shortcut_set} exists.');
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-    $this->assertFalse(db_table_exists('shortcut_set'), 'Table {shortcut_set} has been deleted.');
-
-    // Ensure that the Drupal 7 default set has been created.
-    $set = entity_load('shortcut_set', 'default');
-    $this->assertTrue($set->uuid(), 'Converted set has a UUID');
-    $this->assertEqual($set->label(), 'Default');
-
-    // Test that the custom set has been updated.
-    $set = entity_load('shortcut_set', 'shortcut-set-2');
-    $this->assertTrue($set->uuid(), 'Converted set has a UUID');
-    $this->assertEqual($set->label(), 'Custom shortcut set');
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/StateSystemUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/StateSystemUpgradePathTest.php
deleted file mode 100644
index b9a97a5..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/StateSystemUpgradePathTest.php
+++ /dev/null
@@ -1,89 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\StateSystemUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests upgrade of system variables.
- */
-class StateSystemUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name' => 'State system upgrade test',
-      'description' => 'Tests upgrade of system variables to the state system.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.state.system.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests upgrade of system variables to state system.
-   */
-  public function testSystemVariableUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    $expected_state = array();
-
-    $expected_state['node.node_access_needs_rebuild'] = array(
-      'value' => TRUE,
-      'variable_name' => 'node_access_needs_rebuild',
-    );
-    $expected_state['node.cron_last'] = array(
-      'value' => 1304208001,
-      'variable_name' => 'node_cron_last',
-    );
-    $expected_state['statistics.day_timestamp'] = array(
-      'value' => 1352070595,
-      'variable_name' => 'statistics_day_timestamp',
-    );
-    $expected_state['statistics.node_counter_scale'] = array(
-      'value' => 1.0 / 2000,
-      'variable_name' => 'node_cron_views_scale',
-    );
-    $expected_state['system.cron_last'] = array(
-      'value' => 1304208002,
-      'variable_name' => 'cron_last',
-    );
-    $expected_state['system.cron_key'] = array(
-      'value' => 'kdm95qppDDlyZrcUOx453YwQqDA4DNmxi4VQcxzFU9M',
-      'variable_name' => 'cron_key',
-    );
-    $expected_state['system.private_key'] = array(
-      'value' => 'G38mKqASKus8VGMkMzVuXImYbzspCQ1iRT2iEZpMYmQ',
-      'variable_name' => 'drupal_private_key',
-    );
-    $expected_state['tracker.index_nid'] = array(
-      'value' => 0,
-      'variable_name' => 'tracker_index_nid',
-    );
-    $expected_state['update.last_check'] = array(
-      'value' => 1304208000,
-      'variable_name' => 'update_last_check',
-    );
-    $expected_state['update.last_email_notification'] = array(
-      'value' => 1304208000,
-      'variable_name' => 'update_last_email_notification',
-    );
-    $expected_state['comment.node_comment_statistics_scale'] = array(
-      'value' => 1.0 / 1000,
-      'variable_name' => 'node_cron_comments_scale',
-    );
-
-    foreach ($expected_state as $name => $data) {
-      $this->assertIdentical(\Drupal::state()->get($name), $data['value']);
-      $deleted = !db_query('SELECT value FROM {variable} WHERE name = :name', array(':name' => $data['variable_name']))->fetchField();
-      $this->assertTrue($deleted, format_string('Variable !name has been deleted.', array('!name' => $data['variable_name'])));
-    }
-  }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/SystemUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/SystemUpgradePathTest.php
deleted file mode 100644
index 6b0ad23..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/SystemUpgradePathTest.php
+++ /dev/null
@@ -1,195 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\SystemUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests upgrade of system variables.
- */
-class SystemUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name' => 'System config upgrade test',
-      'description' => 'Tests upgrade of system variables to the configuration system.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.system.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests upgrade of variables to config.
-   */
-  public function testVariableUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Verify that variables were properly upgraded.
-    $expected_config['system.cron'] = array(
-      'threshold.autorun' => '86400',
-      'threshold.requirements_warning' => '86400',
-      'threshold.requirements_error' => '172800',
-    );
-
-    $expected_config['system.logging'] = array(
-      'error_level' => 'some',
-    );
-
-    $expected_config['system.maintenance'] = array(
-      'message' => 'Testing config upgrade',
-    );
-
-    $expected_config['system.performance'] = array(
-      'cache.page.use_internal' => '1',
-      'cache.page.max_age' => '1800',
-      'response.gzip' => '1',
-      'js.preprocess' => '1',
-      'css.preprocess' => '1',
-      'fast_404' => array(
-        'enabled' => '1',
-        'paths' => '/\.(?:txt|png|gif|jpe?g|css|js|ico|swf|flv|cgi|bat|pl|dll|exe|aspi|pdf)$/i',
-        'exclude_paths' => '/\/(?:styles|imagecache)\//',
-        'html' => '<!DOCTYPE html><html><head><title>Page Not Found</title></head><body><h1>Page Not Found</h1><p>The requested URL "@path" was not found on this server.</p></body></html>',
-      ),
-    );
-
-    $expected_config['system.rss'] = array(
-      'channel.description' => 'Testing config upgrade',
-      'items.limit' => '20',
-      'items.view_mode' => 'teaser',
-    );
-
-    $expected_config['system.site'] = array(
-      'name' => 'Testing config upgrade',
-      // The upgrade from site_mail to system.site:mail is not testable as
-      // simpletest overrides this configuration with simpletest@example.com.
-      // 'mail' => 'config@example.com',
-      'slogan' => 'CMI makes Drupal 8 drush cex -y',
-      'page.403' => '403',
-      'page.404' => '404',
-      'page.front' => 'node',
-    );
-
-    $expected_config['user.settings'] = array(
-      'cancel_method' => 'user_cancel_reassign',
-    );
-
-    $expected_config['system.filter'] = array(
-      'protocols.0' => 'http',
-      'protocols.1' => 'https',
-      'protocols.2' => 'ftp',
-      'protocols.3' => 'mailto',
-    );
-
-    $expected_config['taxonomy.settings'] = array(
-      'override_selector' => '1',
-      'terms_per_page_admin' => '32',
-      'maintain_index_table' => '0',
-    );
-
-    $expected_config['filter.settings'] = array(
-      'fallback_format' => 'plain_text'
-    );
-
-    $expected_config['action.settings'] = array(
-      'recursion_limit' => 42,
-    );
-
-    // Color module for theme bartik, optional screenshot.
-    $expected_config['color.bartik'] = array(
-      'palette' => array(
-        'top' => '#8eccf2',
-        'bottom' => '#48a9e4',
-        'bg' => '#ffffff',
-        'sidebar' => '#f6f6f2',
-        'sidebarborders' => '#f9f9f9',
-        'footer' => '#db2a2a',
-        'titleslogan' => '#fffeff',
-        'text' => '#fb8484',
-        'link' => '#3587b7',
-      ),
-      'logo' => 'public://color/bartik-09696463/logo.png',
-      'stylesheets' => 'public://color/bartik-09696463/colors.css',
-      'files' => array(
-        'public://color/bartik-09696463/logo.png', 'public://color/bartik-09696463/colors.css'
-      ),
-    );
-    // Second try with faked seven upgrade, optional screenshot.
-    $expected_config['color.seven'] = array(
-      'palette' => array(
-        'top' => '#8eccf2',
-        'bottom' => '#48a9e4',
-        'bg' => '#ffffff',
-        'sidebar' => '#f6f6f2',
-        'sidebarborders' => '#f9f9f9',
-        'footer' => '#db2a2a',
-        'titleslogan' => '#fffeff',
-        'text' => '#fb8484',
-        'link' => '#3587b7',
-      ),
-      'logo' => 'public://color/seven-09696463/logo.png',
-      'stylesheets' => 'public://color/seven-09696463/colors.css',
-      'files' => array(
-        'public://color/seven-09696463/logo.png', 'public://color/seven-09696463/colors.css'
-      ),
-      'screenshot' => 'public://color/seven-09696463/dummy-screenshot.png',
-    );
-
-    $expected_config['book.settings'] = array(
-      'allowed_types' => array(
-        'book',
-        // Content type does not have to exist.
-        'test',
-      ),
-      'block' => array(
-        'navigation' => array(
-          'mode' => 'all pages'
-        )
-      ),
-      'child_type' => 'book',
-    );
-
-    $expected_config['aggregator.settings'] = array(
-      'fetcher' => 'test_fetcher',
-      'parser' => 'test_parser',
-      'processors' => array('test_processor'),
-      'items.allowed_html' => '<a>',
-      'items.teaser_length' => 6000,
-      'items.expire' => 10,
-      'source.list_max' => 5,
-    );
-
-    foreach ($expected_config as $file => $values) {
-      $config = \Drupal::config($file);
-      $this->verbose(print_r($config->get(), TRUE));
-      foreach ($values as $name => $value) {
-        $stored = $config->get($name);
-        // Make sure we have a string representation to show.
-        $stored_txt = !is_string($stored) ? json_encode($stored) : $stored;
-        $value_txt = !is_string($value) ? json_encode($value) : $value;
-        $this->assertEqual($value, $stored, format_string('Expected value for %name found: %stored (previously: %value).', array('%name' => $name, '%stored' => $stored_txt, '%value' => $value_txt)));
-      }
-    }
-  }
-
-  /**
-   * Check whether views got enabled.
-   */
-  public function testFrontpageUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    $this->assertTrue($this->container->get('module_handler')->moduleExists('views'), 'Views is enabled after the upgrade.');
-    $view = $this->container->get('entity.manager')->getStorageController('view')->load('frontpage');
-    $this->assertTrue($view->status(), 'The frontpage view is enabled after the upgrade.');
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/UpgradePathTestBase.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/UpgradePathTestBase.php
deleted file mode 100644
index d72ed54..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/UpgradePathTestBase.php
+++ /dev/null
@@ -1,387 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\UpgradePathTestBase.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Component\Utility\Crypt;
-use Drupal\Core\Database\Database;
-use Drupal\Core\DependencyInjection\ContainerBuilder;
-use Drupal\Core\DrupalKernel;
-use Drupal\Core\Session\UserSession;
-use Drupal\simpletest\WebTestBase;
-use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
-use Symfony\Component\HttpFoundation\Request;
-
-/**
- * Perform end-to-end tests of the upgrade path.
- */
-abstract class UpgradePathTestBase extends WebTestBase {
-
-  /**
-   * @var array
-   */
-  protected $configDirectories;
-
-  /**
-   * The file path(s) to the dumped database(s) to load into the child site.
-   *
-   * @var array
-   */
-  var $databaseDumpFiles = array();
-
-  /**
-   * Flag that indicates whether the child site has been upgraded.
-   */
-  var $upgradedSite = FALSE;
-
-  /**
-   * Array of errors triggered during the upgrade process.
-   */
-  var $upgradeErrors = array();
-
-  /**
-   * Flag to indicate whether there are pending updates or not.
-   */
-  var $pendingUpdates = TRUE;
-
-  /**
-   * Prepares the appropriate session for the release of Drupal being upgraded.
-   */
-  protected function prepareD8Session() {
-    // We need an IP when storing sessions
-    // so add a dummy request in the container.
-    $request = Request::create('http://example.com/');
-    $request->server->set('REMOTE_ADDR', '3.3.3.3');
-    $this->container->set('request', $request);
-
-    // Generate and set a D7-compatible session cookie.
-    $this->curlInitialize();
-    $sid = Crypt::hashBase64(uniqid(mt_rand(), TRUE) . Crypt::randomBytes(55));
-    $this->curlCookies[] = rawurlencode(session_name()) . '=' . rawurlencode($sid);
-
-    // Force our way into the session of the child site.
-    drupal_save_session(TRUE);
-    _drupal_session_write($sid, '');
-    drupal_save_session(FALSE);
-  }
-
-  /**
-   * Checks that zlib is enabled in order to run the upgrade tests.
-   */
-  protected function checkRequirements() {
-    if (!function_exists('gzopen')) {
-      return array(
-        'Missing zlib requirement for upgrade tests.',
-      );
-    }
-    return parent::checkRequirements();
-  }
-
-  /**
-   * Overrides Drupal\simpletest\WebTestBase::setUp() for upgrade testing.
-   *
-   * @see \Drupal\simpletest\WebTestBase::prepareDatabasePrefix()
-   * @see \Drupal\simpletest\WebTestBase::changeDatabasePrefix()
-   * @see \Drupal\simpletest\WebTestBase::prepareEnvironment()
-   */
-  protected function setUp() {
-    global $user, $conf;
-
-    // Load the Update API.
-    require_once DRUPAL_ROOT . '/core/includes/update.inc';
-
-    // Load Session API.
-    require_once DRUPAL_ROOT . '/core/includes/session.inc';
-    drupal_session_initialize();
-
-    // Reset flags.
-    $this->upgradedSite = FALSE;
-    $this->upgradeErrors = array();
-
-    // Create the database prefix for this test.
-    $this->prepareDatabasePrefix();
-
-    // Prepare the environment for running tests.
-    $this->prepareEnvironment();
-    if (!$this->setupEnvironment) {
-      return FALSE;
-    }
-
-    // Reset all statics and variables to perform tests in a clean environment.
-    $conf = array();
-    drupal_static_reset();
-
-
-    // Build a minimal, partially mocked environment for unit tests.
-    $this->rebuildContainer();
-    // Make sure it survives kernel rebuilds.
-    $conf['container_service_providers']['TestServiceProvider'] = 'Drupal\simpletest\TestServiceProvider';
-
-    // Change the database prefix.
-    // All static variables need to be reset before the database prefix is
-    // changed, since Drupal\Core\Utility\CacheArray implementations attempt to
-    // write back to persistent caches when they are destructed.
-    $this->changeDatabasePrefix();
-    if (!$this->setupDatabasePrefix) {
-      return FALSE;
-    }
-
-    // Load the database from the portable PHP dump.
-    // The files may be gzipped.
-    foreach ($this->databaseDumpFiles as $file) {
-      if (substr($file, -3) == '.gz') {
-        $file = "compress.zlib://$file";
-      }
-      require $file;
-    }
-
-    // Set path variables.
-    $this->variable_set('file_public_path', $this->public_files_directory);
-    $this->variable_set('file_private_path', $this->private_files_directory);
-    $this->variable_set('file_temporary_path', $this->temp_files_directory);
-
-    $this->pass('Finished loading the dump.');
-
-    // Override $update_free_access in settings.php to allow the anonymous user
-    // to run updates.
-    $install_profile = unserialize(db_query('SELECT value FROM {variable} WHERE name = :name', array(':name' => 'install_profile'))->fetchField());
-    $settings = array(
-      'settings' => array(
-        'install_profile' => (object) array(
-          'value' => $install_profile,
-          'required' => TRUE,
-        ),
-      ),
-    );
-    $this->writeSettings($settings);
-    $this->settingsSet('install_profile', $install_profile);
-    $this->profile = $install_profile;
-
-    // Ensure that the session is not written to the new environment and replace
-    // the global $user session with uid 1 from the new test site.
-    drupal_save_session(FALSE);
-    // Load values for uid 1.
-    $values = db_query('SELECT * FROM {users} WHERE uid = :uid', array(':uid' => 1))->fetchAssoc();
-    // Load rolest.
-    $values['roles'] = array_merge(array(DRUPAL_AUTHENTICATED_RID), db_query('SELECT rid FROM {users_roles} WHERE uid = :uid', array(':uid' => 1))->fetchCol());
-    // Create a new user session object.
-    $user = new UserSession($values);
-
-    // Generate and set a D8-compatible session cookie.
-    $this->prepareD8Session();
-
-    // Restore necessary variables.
-    $this->variable_set('site_mail', 'simpletest@example.com');
-
-    drupal_set_time_limit($this->timeLimit);
-    $this->setup = TRUE;
-  }
-
-  /**
-   * Overrides \Drupal\simpletest\TestBase::prepareConfigDirectories().
-   */
-  protected function prepareConfigDirectories() {
-    // The configuration directories are prepared as part of the first access to
-    // update.php.
-  }
-
-  /**
-   * Specialized variable_set() that works even if the child site is not upgraded.
-   *
-   * @param $name
-   *   The name of the variable to set.
-   * @param $value
-   *   The value to set. This can be any PHP data type; these functions take care
-   *   of serialization as necessary.
-   *
-   * @todo Update for D8 configuration system.
-   */
-  protected function variable_set($name, $value) {
-    db_delete('variable')
-      ->condition('name', $name)
-      ->execute();
-    db_insert('variable')
-      ->fields(array(
-        'name' => $name,
-        'value' => serialize($value),
-      ))
-      ->execute();
-
-    try {
-      cache()->delete('variables');
-      cache('bootstrap')->delete('variables');
-    }
-    // Since cache_bootstrap won't exist in a Drupal 6 site, ignore the
-    // exception if the above fails.
-    catch (\Exception $e) {}
-  }
-
-  /**
-   * Specialized refreshVariables().
-   */
-  protected function refreshVariables() {
-    // Refresh the variables only if the site was already upgraded.
-    if ($this->upgradedSite) {
-      global $conf;
-      cache('bootstrap')->delete('variables');
-      $conf = variable_initialize();
-      $container = drupal_container();
-      if ($container->has('config.factory')) {
-        $container->get('config.factory')->reset();
-      }
-    }
-  }
-
-  /**
-   * Perform the upgrade.
-   *
-   * @param $register_errors
-   *   Register the errors during the upgrade process as failures.
-   * @return
-   *   TRUE if the upgrade succeeded, FALSE otherwise.
-   */
-  protected function performUpgrade($register_errors = TRUE) {
-
-    // Load the first update screen.
-    $this->getUpdatePhp();
-    if (!$this->assertResponse(200)) {
-      throw new \Exception('Initial GET to update.php did not return HTTP 200 status.');
-    }
-
-    // Ensure that the first update screen appeared correctly.
-    if (!$this->assertFieldByXPath('//input[@type="submit"]')) {
-      throw new \Exception('An error was encountered during the first access to update.php.');
-    }
-
-    // Initialize config directories and rebuild the service container after
-    // creating them in the first step.
-    parent::prepareConfigDirectories();
-    $this->rebuildContainer();
-
-    // Continue.
-    $this->drupalPostForm(NULL, array(), t('Continue'));
-    if (!$this->assertResponse(200)) {
-      throw new \Exception('POST to continue update.php did not return HTTP 200 status.');
-    }
-
-    // The test should pass if there are no pending updates.
-    $content = $this->drupalGetContent();
-    if (strpos($content, t('No pending updates.')) !== FALSE) {
-      $this->pass('No pending updates and therefore no upgrade process to test.');
-      $this->pendingUpdates = FALSE;
-      return TRUE;
-    }
-
-    // Go!
-    $this->drupalPostForm(NULL, array(), t('Apply pending updates'));
-    if (!$this->assertResponse(200)) {
-      throw new \Exception('POST to update.php to apply pending updates did not return HTTP 200 status.');
-    }
-
-    if (!$this->assertNoText(t('An unrecoverable error has occurred.'))) {
-      // Error occured during update process.
-      throw new \Exception('POST to update.php to apply pending updates detected an unrecoverable error.');
-    }
-
-    // Check for errors during the update process.
-    foreach ($this->xpath('//li[@class=:class]', array(':class' => 'failure')) as $element) {
-      $message = strip_tags($element->asXML());
-      $this->upgradeErrors[] = $message;
-      if ($register_errors) {
-        $this->fail($message);
-      }
-    }
-    if (!empty($this->upgradeErrors)) {
-      // Upgrade failed, the installation might be in an inconsistent state,
-      // don't process.
-      throw new \Exception('Errors during update process.');
-    }
-
-    // Allow tests to check the completion page.
-    $this->checkCompletionPage();
-
-    // Check if there still are pending updates.
-    $this->getUpdatePhp();
-    $this->drupalPostForm(NULL, array(), t('Continue'));
-    if (!$this->assertText(t('No pending updates.'), 'No pending updates at the end of the update process.')) {
-      throw new \Exception('update.php still shows pending updates after execution.');
-    }
-
-    // Upgrade succeed, rebuild the environment so that we can call the API
-    // of the child site directly from this request.
-    $this->upgradedSite = TRUE;
-
-    // Force a variable refresh as we only just enabled it.
-    $this->refreshVariables();
-
-    // Reload module list for modules that are enabled in the test database
-    // but not on the test client.
-    \Drupal::moduleHandler()->resetImplementations();
-    \Drupal::moduleHandler()->reload();
-
-    // Rebuild the container and all caches.
-    $this->rebuildContainer();
-    $this->resetAll();
-
-    return TRUE;
-  }
-
-  /**
-   * Overrides some core services for the upgrade tests.
-   */
-  public function containerBuild(ContainerBuilder $container) {
-    // Keep the container object around for tests.
-    $this->container = $container;
-
-    $container
-      ->register('config.storage', 'Drupal\Core\Config\FileStorage')
-      ->addArgument($this->configDirectories[CONFIG_ACTIVE_DIRECTORY]);
-
-    if ($this->container->hasDefinition('path_processor_alias')) {
-      // Prevent the alias-based path processor, which requires a url_alias db
-      // table, from being registered to the path processor manager. We do this
-      // by removing the tags that the compiler pass looks for. This means the
-      // url generator can safely be used within upgrade path tests.
-      $definition = $this->container->getDefinition('path_processor_alias');
-      $definition->clearTag('path_processor_inbound')->clearTag('path_processor_outbound');
-    }
-  }
-
-  /**
-   * Gets update.php without calling url().
-   *
-   * Required since WebTestBase::drupalGet() calls t(), which calls into
-   * system_list(), from the parent site/test runner, before update.php is even
-   * executed.
-   *
-   * @see WebTestBase::drupalGet()
-   */
-  protected function getUpdatePhp() {
-    $this->rebuildContainer();
-    $path = $GLOBALS['base_url'] . '/core/update.php';
-    $out = $this->curlExec(array(CURLOPT_HTTPGET => TRUE, CURLOPT_URL => $path, CURLOPT_NOBODY => FALSE));
-    // Ensure that any changes to variables in the other thread are picked up.
-    $this->refreshVariables();
-
-    // Replace original page output with new output from redirected page(s).
-    if ($new = $this->checkForMetaRefresh()) {
-      $out = $new;
-    }
-    $this->verbose('GET request to: ' . $path .
-      '<hr />Ending URL: ' . $this->getUrl() .
-      '<hr />' . $out);
-    return $out;
-  }
-
-  /**
-   * Checks the update.php completion page.
-   *
-   * Invoked by UpgradePathTestBase::performUpgrade() to allow upgrade tests to
-   * check messages and other output on the final confirmation page.
-   */
-  protected function checkCompletionPage() { }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/UserPermissionUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/UserPermissionUpgradePathTest.php
deleted file mode 100644
index ecb8b3a..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/UserPermissionUpgradePathTest.php
+++ /dev/null
@@ -1,64 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\UserPermissionUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Core\Session\UserSession;
-
-/**
- * Tests upgrading a bare database with user role data.
- *
- * Loads a bare installation of Drupal 7 with role data and runs the
- * upgrade process on it. Tests for the upgrade of user permissions.
- */
-class UserPermissionUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name'  => 'User permission upgrade test',
-      'description'  => 'Upgrade tests for user permissions.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.user_permission.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests user-related permissions after a successful upgrade.
-   */
-  public function testUserPermissionUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    $this->drupalGet('');
-    $this->assertResponse(200);
-
-    // Verify that we are still logged in.
-    $this->drupalGet('user');
-    $this->clickLink(t('Edit'));
-    $this->assertEqual($this->getUrl(), url('user/1/edit', array('absolute' => TRUE)), 'We are still logged in as admin at the end of the upgrade.');
-
-    // Login as another 'administrator' role user whose uid != 1
-    $this->drupalLogout();
-    $user = new UserSession(array(
-      'uid' => 2,
-      'name' => 'user1',
-      'pass_raw' => 'user1',
-    ));
-    $this->drupalLogin($user);
-
-    // Check that user with permission 'administer users' also gets
-    // 'administer account settings' access.
-    $this->drupalGet('admin/config/people/accounts');
-    $this->assertResponse(200, '"Administer account settings" page was found.');
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/UserPictureUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/UserPictureUpgradePathTest.php
deleted file mode 100644
index 85822dc..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/UserPictureUpgradePathTest.php
+++ /dev/null
@@ -1,80 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\UserPictureUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-use Drupal\Core\Language\Language;
-
-/**
- * Tests upgrading a filled database with user picture data.
- *
- * Loads a filled installation of Drupal 7 with user picture data and runs the
- * upgrade process on it.
- */
-class UserPictureUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name'  => 'User picture upgrade test',
-      'description'  => 'Upgrade tests with user picture data.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $path = drupal_get_path('module', 'system') . '/tests/upgrade';
-    $this->databaseDumpFiles = array(
-      $path . '/drupal-7.bare.standard_all.database.php.gz',
-      $path . '/drupal-7.user_picture.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests expected user picture conversions after a successful upgrade.
-   */
-  public function testUserPictureUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Retrieve the field instance and check for migrated settings.
-    $instance = field_info_instance('user', 'user_picture', 'user');
-    // We explicitly avoid using the getFieldSetting() method here, since it
-    // merges field and instance settings.
-    $file = entity_load('file', $instance->settings['default_image']['fid']);
-    $this->assertTrue($file, 'Default user picture has been migrated.');
-    $this->assertEqual($file->getFileUri(), 'public://user_pictures_dir/druplicon.png', 'File id matches the uri expected.');
-    $this->assertEqual($file->getFilename(), 'druplicon.png');
-    $this->assertEqual($file->langcode->value, Language::LANGCODE_NOT_SPECIFIED);
-    $this->assertEqual($file->getMimeType(), 'image/png');
-    $this->assertFalse(empty($file->uuid->value));
-
-    // Check file usage for the default image.
-    $usage = file_usage()->listUsage($file);
-    $field = field_info_field('user', 'user_picture');
-    $this->assertTrue(isset($usage['image']['default_image'][$field->uuid()]));
-
-    $this->assertEqual($instance->getFieldSetting('max_resolution'), '800x800', 'User picture maximum resolution has been migrated.');
-    $this->assertEqual($instance->getFieldSetting('max_filesize'), '700 KB', 'User picture maximum filesize has been migrated.');
-    $this->assertEqual($instance->getFieldDescription(), 'These are user picture guidelines.', 'User picture guidelines are now the user picture field description.');
-    $this->assertEqual($instance->getFieldSetting('file_directory'), 'user_pictures_dir', 'User picture directory path has been migrated.');
-
-    $display_options = entity_get_display('user', 'user', 'default')->getComponent('user_picture');
-    $this->assertEqual($display_options['settings']['image_style'], 'thumbnail', 'User picture image style setting has been migrated.');
-
-    // Verify compact view mode default settings.
-    $this->drupalGet('admin/config/people/accounts/display/compact');
-    $this->assertFieldByName('fields[member_for][type]', 'hidden');
-
-    // Check the user picture and file usage record.
-    $user = user_load(1);
-    $file = $user->user_picture->entity;
-    $this->assertEqual('public://user_pictures_dir/faked_image.png', $file->getFileUri());
-    $usage = file_usage()->listUsage($file);
-    $this->assertEqual(1, $usage['file']['user'][1]);
-  }
-
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/UserRoleUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/UserRoleUpgradePathTest.php
deleted file mode 100644
index a58da9d..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/UserRoleUpgradePathTest.php
+++ /dev/null
@@ -1,93 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\UserRoleUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Tests upgrading a bare database with user role data.
- *
- * Loads a bare installation of Drupal 7 with role data and runs the
- * upgrade process on it. Tests for the conversion of serial role IDs to role
- * machine names.
- */
-class UserRoleUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name'  => 'Role upgrade test',
-      'description'  => 'Upgrade tests with role data.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.roles.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests expected role ID conversions after a successful upgrade.
-   */
-  public function testRoleUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Check that "gärtner" has been converted to "4" and that the role
-    // edit page for it exists.
-    $this->drupalGet('admin/people/roles/manage/4');
-    $this->assertResponse(200, 'Role edit page for "gärtner" was found.');
-    $this->assertField('label', 'Role edit page for "gärtner" was found.');
-    $this->assertRaw('gärtner', 'Role edit page for "gärtner" was found.');
-
-    // Check that the anonymous user role ID has been converted from "1" to
-    // "anonymous".
-    $this->drupalGet('admin/people/permissions/' . DRUPAL_ANONYMOUS_RID);
-    $this->assertResponse(200, 'Permission edit page for "anonymous" was found.');
-
-    // Check that the authenticated user role ID has been converted from "2" to
-    // "authenticated".
-    $this->drupalGet('admin/people/permissions/' . DRUPAL_AUTHENTICATED_RID);
-    $this->assertResponse(200, 'Permission edit page for "authenticated" was found.');
-
-    // Check that the permission for "gärtner" still exists.
-    $this->drupalGet('admin/people/permissions/4');
-    $this->assertFieldChecked('edit-4-edit-own-comments', 'Edit own comments permission for "gärtner" is set correctly.');
-
-    // Check that the role visibility setting for the who's online block still
-    // exists.
-    $this->drupalGet('admin/structure/block/add/user_online_block/bartik');
-
-    // @todo Blocks are not being upgraded.
-    //   $this->assertFieldChecked('edit-visibility-role-roles-5', "Who's online block visibility setting is correctly set for the long role name.");
-
-    // Check that the role name is still displayed as expected.
-    $this->assertText('gärtner', 'Role name is displayed on block visibility settings.');
-    $this->assertText('very long role name that has exactly sixty-four characters in it', 'Role name is displayed on block visibility settings.');
-    $this->assertText('very_long role name that has exactly sixty-four characters in it', 'Role name is displayed on block visibility settings.');
-
-    // The administrative user role must still be assigned to the
-    // "administrator" role (rid 3).
-    $this->drupalGet('admin/config/people/accounts');
-    $this->assertFieldByName('user_admin_role', 3);
-  }
-
-  /**
-   * Tests that roles were converted to config.
-   */
-  public function testRoleUpgradeToConfig() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Check that the 'anonymous' role has been converted to config.
-    $anonymous = entity_load('user_role', DRUPAL_ANONYMOUS_RID);
-    $this->assertNotEqual(FALSE, $anonymous, "The 'anonymous' role has been converted to config.");
-
-    // Check that the 'authenticated' role has been converted to config.
-    $authenticated = entity_load('user_role', DRUPAL_AUTHENTICATED_RID);
-    $this->assertNotEqual(FALSE, $authenticated, "The 'authenticated' role has been converted to config.");
-  }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Upgrade/UuidUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/UuidUpgradePathTest.php
deleted file mode 100644
index 3299d22..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Upgrade/UuidUpgradePathTest.php
+++ /dev/null
@@ -1,62 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Upgrade\UuidUpgradePathTest.
- */
-
-namespace Drupal\system\Tests\Upgrade;
-
-/**
- * Performs major version release upgrade tests on a populated database.
- *
- * Loads an installation of Drupal 7.x and runs the upgrade process on it.
- *
- * The install contains the minimal profile modules (along with generated
- * content) so that an update from of a site under this profile may be tested.
- */
-class UuidUpgradePathTest extends UpgradePathTestBase {
-  public static function getInfo() {
-    return array(
-      'name'  => 'UUID upgrade test',
-      'description'  => 'Upgrade tests for a node and user data.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    // Path to the database dump files.
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.filled.standard_all.database.php.gz',
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.language.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests a successful point release update.
-   */
-  public function testUuidUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Confirm that all {node} entries has uuid.
-    $result = db_query('SELECT COUNT(*) FROM {comment} WHERE uuid IS NULL')->fetchField();
-    $this->assertFalse($result, 'All comments has uuid assigned');
-
-    // Confirm that all {node} entries has uuid.
-    $result = db_query('SELECT COUNT(*) FROM {file_managed} WHERE uuid IS NULL')->fetchField();
-    $this->assertFalse($result, 'All files has uuid assigned');
-
-    // Confirm that all {node} entries has uuid.
-    $result = db_query('SELECT COUNT(*) FROM {node} WHERE uuid IS NULL')->fetchField();
-    $this->assertFalse($result, 'All nodes has uuid assigned');
-
-    // Confirm that all {node} entries has uuid.
-    $result = db_query('SELECT COUNT(*) FROM {taxonomy_term_data} WHERE uuid IS NULL')->fetchField();
-    $this->assertFalse($result, 'All taxonomy terms has uuid assigned');
-
-    // Confirm that all {user} entries has uuid.
-    $result = db_query('SELECT COUNT(*) FROM {users} WHERE uuid IS NULL')->fetchField();
-    $this->assertFalse($result, 'All users has uuid assigned');
-  }
-}
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/TaxonomyUpgradePathTest.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/TaxonomyUpgradePathTest.php
deleted file mode 100644
index b288636..0000000
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/TaxonomyUpgradePathTest.php
+++ /dev/null
@@ -1,52 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\taxonomy\Tests\TaxonomyUpgradePathTest.
- */
-
-namespace Drupal\taxonomy\Tests;
-
-use Drupal\system\Tests\Upgrade\UpgradePathTestBase;
-
-/**
- * Tests upgrade of taxonomy variables.
- */
-class TaxonomyUpgradePathTest extends UpgradePathTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Taxonomy upgrade test',
-      'description' => 'Tests upgrade of Taxonomy module.',
-      'group' => 'Upgrade path',
-    );
-  }
-
-  public function setUp() {
-    $this->databaseDumpFiles = array(
-      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.standard_all.database.php.gz',
-      drupal_get_path('module', 'taxonomy') . '/tests/upgrade/drupal-7.taxonomy.database.php',
-    );
-    parent::setUp();
-  }
-
-  /**
-   * Tests upgrade of taxonomy_term_reference field default values.
-   */
-  public function testEntityDisplayUpgrade() {
-    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
-
-    // Check that the configuration entries were created.
-    $config_entity = \Drupal::config('field.instance.node.article.field_tags')->get();
-    $this->assertTrue(!empty($config_entity), 'Config entity has been created');
-    $this->assertTrue(!empty($config_entity['default_value'][0]['target_uuid']), 'Default value contains target_uuid property');
-
-    // Load taxonomy term to check UUID conversion.
-    $taxonomy_term = entity_load('taxonomy_term', 2);
-
-    // Check that default_value has been converted to Drupal 8 structure.
-    $this->assertEqual($taxonomy_term->uuid(), $config_entity['default_value'][0]['target_uuid'], 'Default value contains the right target_uuid');
-    $this->assertEqual('', $config_entity['default_value'][0]['revision_id'], 'Default value contains the right revision_id');
-  }
-
-}
