reverted:
--- b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6ReviewPageTest.php
+++ a/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6ReviewPageTest.php
@@ -60,7 +60,6 @@
       'filefield',
       'filter',
       'forum',
-      'i18nblocks',
       'i18ntaxonomy',
       'imagecache',
       'imagefield',
@@ -138,6 +137,7 @@
       'devel',
       'devel_generate',
       'devel_node_access',
+      'i18nblocks',
       'i18ncck',
       'i18ncontent',
       'i18npoll',
diff -u b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6Test.php b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6Test.php
--- b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6Test.php
+++ b/core/modules/migrate_drupal_ui/tests/src/Functional/d6/MigrateUpgrade6Test.php
@@ -175,6 +175,7 @@
    */
   protected function getMissingPaths() {
     return [
+      'i18nblocks',
       'i18ncck',
       'i18ncontent',
       // This module is in the missing path list because it is installed on the