reverted:
--- b/core/modules/config_translation/src/Plugin/migrate/source/d6/ProfileFieldTranslation.php
+++ a/core/modules/config_translation/src/Plugin/migrate/source/d6/ProfileFieldTranslation.php
@@ -14,7 +14,7 @@
  */
 class ProfileFieldTranslation extends DrupalSqlBase {
 
+  /**
-   /**
    * {@inheritdoc}
    */
   public function query() {
reverted:
--- b/core/modules/content_translation/migrations/d6_taxonomy_term_translation.yml
+++ a/core/modules/content_translation/migrations/d6_taxonomy_term_translation.yml
@@ -5,7 +5,7 @@
   - Content
 source:
   plugin: d6_taxonomy_term
+  translations: true
-  translations: i18n
 process:
   # If you are using this file to build a custom migration consider removing
   # the tid field to allow incremental migrations.
diff -u b/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php b/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php
--- b/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php
@@ -105,7 +105,7 @@
     if ($this->pluginDefinition['requirements_met'] === TRUE) {
 
       // For i18n translations migrate_drupal_i18n must be enabled.
-      if (strpos($this->getSourceModule(), 'i18n') !== false) {
+      if (strpos($this->getSourceModule(), 'i18n') !== FALSE) {
         if (!\Drupal::service('module_handler')
           ->moduleExists('migrate_drupal_i18n')) {
           throw new RequirementsException("The module migrate_drupal_i18n is not enabled on the new site.");
diff -u b/core/modules/migrate_drupal_i18n/migrate_drupal_i18n.info.yml b/core/modules/migrate_drupal_i18n/migrate_drupal_i18n.info.yml
--- b/core/modules/migrate_drupal_i18n/migrate_drupal_i18n.info.yml
+++ b/core/modules/migrate_drupal_i18n/migrate_drupal_i18n.info.yml
@@ -1,6 +1,6 @@
 name: 'Migrate Drupal i18n'
 type: module
-description: 'Required for all i18n migrations.'
+description: 'Provides a requirement for all i18n migrations.'
 package: 'Core (Experimental)'
 core: 8.x
 dependencies:
diff -u b/core/modules/migrate_drupal_i18n/migrate_drupal_i18n.module b/core/modules/migrate_drupal_i18n/migrate_drupal_i18n.module
--- b/core/modules/migrate_drupal_i18n/migrate_drupal_i18n.module
+++ b/core/modules/migrate_drupal_i18n/migrate_drupal_i18n.module
@@ -2,11 +2,10 @@
 
 /**
  * @file
- * Alert administrators before starting the import process.
+ * A requirement for migrating i18n translations.
  */
 
 use Drupal\Core\Routing\RouteMatchInterface;
-use Drupal\Core\Url;
 
 /**
  * Implements hook_help().
@@ -16,11 +15,7 @@
     case 'help.page.migrate_drupal_i18n':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Migrate Drupal i18n module is a requirement for i18n migrations.</a>.');
-
-      $output .= '<p>' . t('The Migrate Drupal i18n module is a requirement for i18n migrations. For more information, see the <a href=":migrate">online documentation for the Migrate Drupal i18n module</a>.',
-          [':migrate' => 'https://www.drupal.org/upgrade/migrate']) . '</p>';
-
+      $output .= '<p>' . t('The Migrate Drupal i18n module is a requirement for migrating i18n translations. It does not provide a user interface. For more information, see the <a href=":migrate_drupal_i18n">online documentation for the Migrate Drupal i18n module</a>.', [':migrate_drupal_i18n' => 'https://www.drupal.org/docs/8/core/modules/experimental-migrate-drupal-i18n']) . '</p>';
       return $output;
   }
 }
diff -u b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6ReviewPagei18nTest.php b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6ReviewPageTest.php
--- b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6ReviewPagei18nTest.php
+++ b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6ReviewPageTest.php
@@ -2,22 +2,30 @@
 
 namespace Drupal\Tests\migrate_drupal_ui\Functional\d6;
 
+use Drupal\Tests\migrate_drupal_ui\Functional\MigrateUpgradeReviewPageTestBase;
+
 /**
  * Tests migrate upgrade review page for Drupal 6.
  *
  * @group migrate_drupal_6
  * @group migrate_drupal_ui
  */
-class MigrateUpgrade6ReviewPagei18nTest extends MigrateUpgrade6ReviewPageTest {
+class MigrateUpgrade6ReviewPageTest extends MigrateUpgradeReviewPageTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->loadFixture(drupal_get_path('module', 'migrate_drupal') . '/tests/fixtures/drupal6.php');
+  }
 
   /**
-   * Modules to enable.
-   *
-   * @var array
+   * {@inheritdoc}
    */
-  public static $modules = [
-    'migrate_drupal_i18n',
-  ];
+  protected function getSourceBasePath() {
+    return __DIR__ . '/files';
+  }
 
   /**
    * {@inheritdoc}
@@ -36,7 +44,6 @@
       'filefield',
       'filter',
       'forum',
-      'i18ntaxonomy',
       'imagecache',
       'imagefield',
       'language',
@@ -119,6 +126,7 @@
       'i18npoll',
       'i18nprofile',
       'i18nsync',
+      'i18ntaxonomy',
       'i18nviews',
       'phone',
       'views',
diff -u b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6i18nTest.php b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6Test.php
--- b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6i18nTest.php
+++ b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6Test.php
@@ -12,7 +12,7 @@
  *
  * @group migrate_drupal_ui
  */
-class MigrateUpgrade6i18nTest extends MigrateUpgrade6Test {
+class MigrateUpgrade6Test extends MigrateUpgradeExecuteTestBase {
 
   /**
    * Modules to enable.
@@ -20,12 +20,35 @@
    * @var array
    */
   public static $modules = [
-    'migrate_drupal_i18n',
+    'language',
+    'content_translation',
+    'migrate_drupal_ui',
+    'telephone',
+    'aggregator',
+    'book',
+    'forum',
+    'statistics',
+    'migration_provider_test',
   ];
 
   /**
    * {@inheritdoc}
    */
+  protected function setUp() {
+    parent::setUp();
+    $this->loadFixture(drupal_get_path('module', 'migrate_drupal') . '/tests/fixtures/drupal6.php');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getSourceBasePath() {
+    return __DIR__ . '/files';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   protected function getEntityCounts() {
     return [
       'aggregator_item' => 1,
@@ -108,7 +131,6 @@
       'filefield',
       'filter',
       'forum',
-      'i18ntaxonomy',
       'imagecache',
       'imagefield',
       'language',
@@ -158,5 +180,18 @@
       'i18nprofile',
+      'i18ntaxonomy',
     ];
   }
 
+  /**
+   * Executes all steps of migrations upgrade.
+   */
+  public function testMigrateUpgradeExecute() {
+    parent::testMigrateUpgradeExecute();
+
+    // Ensure migrated users can log in.
+    $user = User::load(2);
+    $user->passRaw = 'john.doe_pass';
+    $this->drupalLogin($user);
+  }
+
 }