diff --git a/core/modules/migrate_drupal/lib/Drupal/migrate_drupal/Tests/MigrateFullDrupalTestBase.php b/core/modules/migrate_drupal/lib/Drupal/migrate_drupal/Tests/MigrateFullDrupalTestBase.php
index 0dc6010..341cce7 100644
--- a/core/modules/migrate_drupal/lib/Drupal/migrate_drupal/Tests/MigrateFullDrupalTestBase.php
+++ b/core/modules/migrate_drupal/lib/Drupal/migrate_drupal/Tests/MigrateFullDrupalTestBase.php
@@ -19,6 +19,7 @@
    * Get the dump classes required for this migration test.
    *
    * @return array
+   *   The list of files containing dumps.
    */
   protected abstract function getDumps();
 
@@ -26,6 +27,7 @@
    * Get the test classes that needs to be run for this test.
    *
    * @return array
+   *   The list of test fully-classified class names.
    */
   protected abstract function getTestClassesList();