diff --git a/core/modules/block_content/migration_templates/d6_custom_block_translation.yml b/core/modules/content_translation/migrations/d6_custom_block_translation.yml
similarity index 100%
rename from core/modules/block_content/migration_templates/d6_custom_block_translation.yml
rename to core/modules/content_translation/migrations/d6_custom_block_translation.yml
diff --git a/core/modules/block_content/src/Plugin/migrate/source/d6/BoxTranslation.php b/core/modules/content_translation/src/Plugin/migrate/source/d6/BoxTranslation.php
similarity index 97%
rename from core/modules/block_content/src/Plugin/migrate/source/d6/BoxTranslation.php
rename to core/modules/content_translation/src/Plugin/migrate/source/d6/BoxTranslation.php
index 8149991436..694e89242c 100644
--- a/core/modules/block_content/src/Plugin/migrate/source/d6/BoxTranslation.php
+++ b/core/modules/content_translation/src/Plugin/migrate/source/d6/BoxTranslation.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Drupal\block_content\Plugin\migrate\source\d6;
+namespace Drupal\content_translation\Plugin\migrate\source\d6;
 
 use Drupal\Component\Utility\Unicode;
 use Drupal\migrate\Row;
diff --git a/core/modules/block_content/tests/src/Kernel/Migrate/d6/MigrateCustomBlockContentTranslationTest.php b/core/modules/content_translation/tests/src/Kernel/Migrate/d6/MigrateCustomBlockContentTranslationTest.php
similarity index 95%
rename from core/modules/block_content/tests/src/Kernel/Migrate/d6/MigrateCustomBlockContentTranslationTest.php
rename to core/modules/content_translation/tests/src/Kernel/Migrate/d6/MigrateCustomBlockContentTranslationTest.php
index a9bd6d9ec4..4208bd8b34 100644
--- a/core/modules/block_content/tests/src/Kernel/Migrate/d6/MigrateCustomBlockContentTranslationTest.php
+++ b/core/modules/content_translation/tests/src/Kernel/Migrate/d6/MigrateCustomBlockContentTranslationTest.php
@@ -1,9 +1,8 @@
 <?php
 
-namespace Drupal\Tests\block_content\Kernel\Migrate\d6;
+namespace Drupal\Tests\content_translation\Kernel\Migrate\d6;
 
 use Drupal\block_content\Entity\BlockContent;
-use Drupal\language\Entity\ConfigurableLanguage;
 use Drupal\Tests\migrate_drupal\Kernel\d6\MigrateDrupal6TestBase;
 
 /**
diff --git a/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php b/core/modules/content_translation/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php
similarity index 92%
rename from core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php
rename to core/modules/content_translation/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php
index d8205fa78b..d5bd9c7986 100644
--- a/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php
+++ b/core/modules/content_translation/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php
@@ -1,13 +1,13 @@
 <?php
 
-namespace Drupal\Tests\block_content\Kernel\Plugin\migrate\source\d6;
+namespace Drupal\Tests\content_translation\Kernel\Plugin\migrate\source\d6;
 
 use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
 
 /**
  * Tests i18n custom block translations source plugin.
  *
- * @covers Drupal\block_content\Plugin\migrate\source\d6\BoxTranslation
+ * @covers Drupal\content_translation\Plugin\migrate\source\d6\BoxTranslation
  *
  * @group content_translation
  */
@@ -16,7 +16,7 @@ class BoxTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = ['block_content', 'migrate_drupal'];
+  public static $modules = ['content_translation', 'migrate_drupal'];
 
   /**
    * {@inheritdoc}