diff -u b/core/modules/migrate/src/Tests/MigrateTestBase.php b/core/modules/migrate/src/Tests/MigrateTestBase.php
--- b/core/modules/migrate/src/Tests/MigrateTestBase.php
+++ b/core/modules/migrate/src/Tests/MigrateTestBase.php
@@ -48,7 +48,7 @@
   /**
    * The primary migration being tested.
    *
-   * @var MigrationInterface
+   * @var \Drupal\migrate\Entity\MigrationInterface
    */
   protected $migration;