diff --git a/core/modules/migrate/tests/src/Unit/process/MigrationTest.php b/core/modules/migrate/tests/src/Unit/process/MigrationTest.php
index 843d1e5..cade905 100644
--- a/core/modules/migrate/tests/src/Unit/process/MigrationTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/MigrationTest.php
@@ -2,9 +2,6 @@
 
 namespace Drupal\Tests\migrate\Unit\process;
 
-@trigger_error('The ' . __NAMESPACE__ . '\MigrationTest is deprecated in
-Drupal 8.4.0 and will be removed before Drupal 9.0.0. Instead, use ' . __NAMESPACE__ . '\MigrationLookupTest', E_USER_DEPRECATED);
-
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\migrate\MigrateSkipProcessException;
 use Drupal\migrate\Plugin\MigrationInterface;
@@ -17,11 +14,9 @@
 use Prophecy\Argument;
 
 /**
- * @deprecated in Drupal 8.4.x, to be removed before Drupal 9.0.x. Use
- *   \Drupal\Tests\migrate\Unit\process\MigrationLookupTest instead.
- *
  * @coversDefaultClass \Drupal\migrate\Plugin\migrate\process\Migration
  * @group migrate
+ * @group legacy
  */
 class MigrationTest extends MigrateProcessTestCase {