diff -u b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6I18nTest.php b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6I18nTest.php
--- b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6I18nTest.php
+++ b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6I18nTest.php
@@ -104,9 +104,6 @@
     $counts = $this->getEntityCounts();
     $counts['block_content'] = 3;
     $counts['comment'] = 7;
-    $counts['entity_view_display'] = 55;
-    $counts['entity_view_mode'] = 14;
-    $counts['file'] = 9;
     $counts['menu_link_content'] = 9;
     $counts['node'] = 18;
     $counts['taxonomy_term'] = 9;
@@ -278,7 +275,7 @@
     $this->assertReviewPage($session, $available_paths, $missing_paths);
 
     $this->drupalPostForm(NULL, [], t('Perform upgrade'));
-    $this->assertText(t('Congratulations, you upgraded Drupal!'));
+    $session->pageTextContains(t('Congratulations, you upgraded Drupal!'));
     $this->assertMigrationResults($this->getEntityCounts(), $version);
 
     \Drupal::service('module_installer')->install(['forum']);
@@ -325,8 +322,7 @@
   /**
    * Tests that follow-up migrations have been run successfully.
    */
-  protected
-  function assertFollowUpMigrationResults() {
+  protected function assertFollowUpMigrationResults() {
     $node = Node::load(10);
     $this->assertSame('13', $node->get('field_reference')->target_id);
     $this->assertSame('13', $node->get('field_reference_2')->target_id);
@@ -341,8 +337,7 @@
   /**
    * {@inheritdoc}
    */
-  protected
-  function assertIdConflict(WebAssert $session) {
+  protected function assertIdConflict(WebAssert $session) {
     $session->pageTextContains('WARNING: Content may be overwritten on your new site.');
     $session->pageTextContains('There is conflicting content of these types:');
     $session->pageTextContains('aggregator feed items');
diff -u b/core/modules/migrate_drupal_ui/tests/src/Functional/d7/MigrateUpgrade7Test.php b/core/modules/migrate_drupal_ui/tests/src/Functional/d7/MigrateUpgrade7Test.php
--- b/core/modules/migrate_drupal_ui/tests/src/Functional/d7/MigrateUpgrade7Test.php
+++ b/core/modules/migrate_drupal_ui/tests/src/Functional/d7/MigrateUpgrade7Test.php
@@ -23,7 +23,6 @@
   public static $modules = [
     'file',
     'language',
-    'content_translation',
     'migrate_drupal_ui',
     'telephone',
     'aggregator',
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/migrate_drupal_ui/tests/src/Functional/d7/MigrateUpgrade7I18nTest.php
@@ -0,0 +1,360 @@
+<?php
+
+namespace Drupal\Tests\migrate_drupal_ui\Functional\d7;
+
+use Drupal\node\Entity\Node;
+use Drupal\Tests\migrate_drupal_ui\Functional\MigrateUpgradeExecuteTestBase;
+use Drupal\user\Entity\User;
+use Drupal\Tests\WebAssert;
+
+/**
+ * Tests Drupal 7 upgrade via the UI without translations.
+ *
+ * The test method is provided by the MigrateUpgradeTestBase class.
+ *
+ * @group migrate_drupal_ui
+ */
+class MigrateUpgrade7I18nTest extends MigrateUpgradeExecuteTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = [
+    'file',
+    'language',
+    '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/drupal7.php');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getSourceBasePath() {
+    return __DIR__ . '/files';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getEntityCounts() {
+    return [
+      'aggregator_item' => 11,
+      'aggregator_feed' => 1,
+      'block' => 25,
+      'block_content' => 1,
+      'block_content_type' => 1,
+      'comment' => 1,
+      // The 'standard' profile provides the 'comment' comment type, and the
+      // migration creates 6 comment types, one per node type.
+      'comment_type' => 7,
+      // Module 'language' comes with 'en', 'und', 'zxx'. Migration adds 'is'.
+      'configurable_language' => 4,
+      'contact_form' => 3,
+      'editor' => 2,
+      'field_config' => 66,
+      'field_storage_config' => 49,
+      'file' => 3,
+      'filter_format' => 7,
+      'image_style' => 6,
+      'language_content_settings' => 2,
+      'migration' => 73,
+      'node' => 5,
+      'node_type' => 6,
+      'rdf_mapping' => 7,
+      'search_page' => 2,
+      'shortcut' => 6,
+      'shortcut_set' => 2,
+      'action' => 17,
+      'menu' => 6,
+      'taxonomy_term' => 18,
+      'taxonomy_vocabulary' => 4,
+      'tour' => 4,
+      'user' => 4,
+      'user_role' => 3,
+      'menu_link_content' => 10,
+      'view' => 16,
+      'date_format' => 11,
+      'entity_form_display' => 17,
+      'entity_form_mode' => 1,
+      'entity_view_display' => 28,
+      'entity_view_mode' => 14,
+      'base_field_override' => 9,
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getEntityCountsIncremental() {
+    $counts = $this->getEntityCounts();
+    $counts['block_content'] = 2;
+    $counts['comment'] = 2;
+    $counts['file'] = 4;
+    $counts['menu_link_content'] = 11;
+    $counts['node'] = 6;
+    $counts['taxonomy_term'] = 19;
+    $counts['user'] = 5;
+    return $counts;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getAvailablePaths() {
+    return [
+      'aggregator',
+      'block',
+      'book',
+      'color',
+      'comment',
+      'contact',
+      'date',
+      'dblog',
+      'email',
+      'entityreference',
+      'field',
+      'field_sql_storage',
+      'file',
+      'filter',
+      'forum',
+      'image',
+      'language',
+      'link',
+      'list',
+      'locale',
+      'menu',
+      'node',
+      'number',
+      'options',
+      'path',
+      'phone',
+      'search',
+      'shortcut',
+      'statistics',
+      'system',
+      'taxonomy',
+      'text',
+      'user',
+      // Include modules that do not have an upgrade path and are enabled in the
+      // source database, defined in the $noUpgradePath property
+      // in MigrateUpgradeForm.
+      'blog',
+      'contextual',
+      'date_api',
+      'entity',
+      'field_ui',
+      'help',
+      'php',
+      'simpletest',
+      'toolbar',
+      'translation',
+      'trigger',
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getMissingPaths() {
+    return [
+      'rdf',
+      // These modules are in the missing path list because they are installed
+      // on the source site but they are not installed on the destination site.
+      'syslog',
+      'tracker',
+      'update',
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function testMigrateUpgradeExecute() {
+
+    $connection_options = $this->sourceDatabase->getConnectionOptions();
+    $this->drupalGet('/upgrade');
+    $session = $this->assertSession();
+    $session->responseContains('Upgrade a site by importing its files and the data from its database into a clean and empty new install of Drupal 8.');
+
+    $this->drupalPostForm(NULL, [], t('Continue'));
+    $session->pageTextContains('Provide credentials for the database of the Drupal site you want to upgrade.');
+    $session->fieldExists('mysql[host]');
+
+    $driver = $connection_options['driver'];
+    $connection_options['prefix'] = $connection_options['prefix']['default'];
+
+    // Use the driver connection form to get the correct options out of the
+    // database settings. This supports all of the databases we test against.
+    $drivers = drupal_get_database_types();
+    $form = $drivers[$driver]->getFormOptions($connection_options);
+    $connection_options = array_intersect_key($connection_options, $form + $form['advanced_options']);
+    $version = $this->getLegacyDrupalVersion($this->sourceDatabase);
+    $edit = [
+      $driver => $connection_options,
+      'source_private_file_path' => $this->getSourceBasePath(),
+      'version' => $version,
+    ];
+    if ($version == 6) {
+      $edit['d6_source_base_path'] = $this->getSourceBasePath();
+    }
+    else {
+      $edit['source_base_path'] = $this->getSourceBasePath();
+    }
+    if (count($drivers) !== 1) {
+      $edit['driver'] = $driver;
+    }
+    $edits = $this->translatePostValues($edit);
+
+    // Ensure submitting the form with invalid database credentials gives us a
+    // nice warning.
+    $this->drupalPostForm(NULL, [$driver . '[database]' => 'wrong'] + $edits, t('Review upgrade'));
+    $session->pageTextContains('Resolve all issues below to continue the upgrade.');
+
+    $this->drupalPostForm(NULL, $edits, t('Review upgrade'));
+    // Ensure we get errors about missing modules.
+    $session->pageTextContains(t('Resolve all issues below to continue the upgrade.'));
+    $session->pageTextContains(t('The no_source_module plugin must define the source_module property.'));
+
+    // Uninstall the module causing the missing module error messages.
+    $this->container->get('module_installer')
+      ->uninstall(['migration_provider_test'], TRUE);
+
+    // Test the file sources.
+    $this->drupalGet('/upgrade');
+    $this->drupalPostForm(NULL, [], t('Continue'));
+    if ($version == 6) {
+      $paths['d6_source_base_path'] = DRUPAL_ROOT . '/wrong-path';
+    }
+    else {
+      $paths['source_base_path'] = 'https://example.com/wrong-path';
+      $paths['source_private_file_path'] = DRUPAL_ROOT . '/wrong-path';
+    }
+    $this->drupalPostForm(NULL, $paths + $edits, t('Review upgrade'));
+    if ($version == 6) {
+      $session->responseContains('Unable to read from Files directory.');
+    }
+    else {
+      $session->responseContains('Unable to read from Public files directory.');
+      $session->responseContains('Unable to read from Private files directory.');
+    }
+
+    // Restart the upgrade process.
+    $this->drupalGet('/upgrade');
+    $session->responseContains('Upgrade a site by importing its files and the data from its database into a clean and empty new install of Drupal 8.');
+
+    $this->drupalPostForm(NULL, [], t('Continue'));
+    $session->pageTextContains('Provide credentials for the database of the Drupal site you want to upgrade.');
+    $session->fieldExists('mysql[host]');
+
+    $this->drupalPostForm(NULL, $edits, t('Review upgrade'));
+    $this->assertIdConflict($session);
+
+    $this->drupalPostForm(NULL, [], t('I acknowledge I may lose data. Continue anyway.'));
+    $session->statusCodeEquals(200);
+
+    // Ensure there are no errors about missing modules from the test module.
+    $session->pageTextNotContains(t('Source module not found for migration_provider_no_annotation.'));
+    $session->pageTextNotContains(t('Source module not found for migration_provider_test.'));
+    // Ensure there are no errors about any other missing migration providers.
+    $session->pageTextNotContains(t('module not found'));
+
+    // Test the upgrade paths.
+    $available_paths = $this->getAvailablePaths();
+    $missing_paths = $this->getMissingPaths();
+    $this->assertReviewPage($session, $available_paths, $missing_paths);
+
+    $this->drupalPostForm(NULL, [], t('Perform upgrade'));
+    $session->pageTextContains(t('Congratulations, you upgraded Drupal!'));
+    $this->assertMigrationResults($this->getEntityCounts(), $version);
+
+    \Drupal::service('module_installer')->install(['forum']);
+    \Drupal::service('module_installer')->install(['book']);
+
+    // Test incremental migration.
+    $this->createContentPostUpgrade();
+
+    $this->drupalGet('/upgrade');
+    $session->pageTextContains('An upgrade has already been performed on this site. To perform a new migration, create a clean and empty new install of Drupal 8. Rollbacks are not yet supported through the user interface.');
+    $this->drupalPostForm(NULL, [], t('Import new configuration and content from old site'));
+    $this->drupalPostForm(NULL, $edits, t('Review upgrade'));
+    $session->pageTextContains('WARNING: Content may be overwritten on your new site.');
+    $session->pageTextContains('There is conflicting content of these types:');
+    $session->pageTextContains('comments');
+    $session->pageTextContains('content item revisions');
+    $session->pageTextContains('content items');
+    $session->pageTextContains('custom blocks');
+    $session->pageTextContains('custom menu links');
+    $session->pageTextContains('files');
+    $session->pageTextContains('taxonomy terms');
+    $session->pageTextContains('users');
+
+    $this->drupalPostForm(NULL, [], t('I acknowledge I may lose data. Continue anyway.'));
+    $session->statusCodeEquals(200);
+
+    // Need to update available and missing path lists.
+    $all_available = $this->getAvailablePaths();
+    $all_available[] = 'aggregator';
+    $all_missing = $this->getMissingPaths();
+    $all_missing = array_diff($all_missing, ['aggregator']);
+    $this->assertReviewPage($session, $all_available, $all_missing);
+    $this->drupalPostForm(NULL, [], t('Perform upgrade'));
+    $session->pageTextContains(t('Congratulations, you upgraded Drupal!'));
+    $this->assertMigrationResults($this->getEntityCountsIncremental(), $version);
+
+    // Ensure migrated users can log in.
+    $user = User::load(2);
+    $user->passRaw = 'john.doe_pass';
+    $this->drupalLogin($user);
+    $this->assertFollowUpMigrationResults();
+  }
+
+  /**
+   * Tests that follow-up migrations have been run successfully.
+   */
+  protected function assertFollowUpMigrationResults() {
+    $node = Node::load(10);
+    $this->assertSame('13', $node->get('field_reference')->target_id);
+    $this->assertSame('13', $node->get('field_reference_2')->target_id);
+    $this->assertFalse($node->hasTranslation('fr'));
+
+    $node = Node::load(12);
+    $this->assertFalse($node->hasTranslation('en'));
+    $this->assertNull($node->get('field_reference')->target_id);
+    $this->assertNull($node->get('field_reference_2')->target_id);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function assertIdConflict(WebAssert $session) {
+    $session->pageTextContains('WARNING: Content may be overwritten on your new site.');
+    $session->pageTextContains('There is conflicting content of these types:');
+    $session->pageTextContains('aggregator feed items');
+    $session->pageTextContains('aggregator feeds');
+    $session->pageTextContains('files');
+    $session->pageTextContains('comments');
+    $session->pageTextContains('content item revisions');
+    $session->pageTextContains('content items');
+    $session->pageTextContains('custom blocks');
+    $session->pageTextContains('custom menu links');
+    $session->pageTextContains('files');
+    $session->pageTextContains('taxonomy terms');
+    $session->pageTextContains('users');
+  }
+
+}