diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/cckfield/CckFieldPluginBase.php b/core/modules/migrate_drupal/src/Plugin/migrate/cckfield/CckFieldPluginBase.php
index 999344e..0d61c90 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/cckfield/CckFieldPluginBase.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/cckfield/CckFieldPluginBase.php
@@ -45,6 +45,6 @@ public function processFieldValues(MigrationInterface $migration, $field_name, $
    * @param array $data
    *   The array of field data from FieldValues::fieldData().
    */
-  abstract function processCckFieldValues(MigrationInterface $migration, $field_name, $data);
+  abstract public function processCckFieldValues(MigrationInterface $migration, $field_name, $data);
 
 }
diff --git a/core/modules/migrate_drupal/tests/modules/migrate_field_plugin_manager_test/migrate_field_plugin_manager_test.module b/core/modules/migrate_drupal/tests/modules/migrate_field_plugin_manager_test/migrate_field_plugin_manager_test.module
index 7405875..9f9da0d 100644
--- a/core/modules/migrate_drupal/tests/modules/migrate_field_plugin_manager_test/migrate_field_plugin_manager_test.module
+++ b/core/modules/migrate_drupal/tests/modules/migrate_field_plugin_manager_test/migrate_field_plugin_manager_test.module
@@ -1,5 +1,10 @@
 <?php
 
+/**
+ * @file
+ * Module for Migrate Field Plugin Manager testing.
+ */
+
 use Drupal\migrate_field_plugin_manager_test\Plugin\migrate\cckfield\d6\FileField;
 
 function migrate_field_plugin_manager_test_migrate_field_info_alter(array &$definitions) {
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/MigrateFieldPluginManagerTest.php b/core/modules/migrate_drupal/tests/src/Kernel/MigrateFieldPluginManagerTest.php
index f3e7996..7c3c5a4 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/MigrateFieldPluginManagerTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/MigrateFieldPluginManagerTest.php
@@ -3,7 +3,6 @@
 namespace Drupal\Tests\migrate_drupal\Kernel;
 
 use Drupal\Component\Plugin\Exception\PluginNotFoundException;
-use Drupal\migrate_field_plugin_manager_test\Plugin\migrate\cckfield\d6\FileField;
 
 /**
  * Tests the field plugin manager.
@@ -15,7 +14,7 @@ class MigrateFieldPluginManagerTest extends MigrateDrupalTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('system', 'user', 'field', 'migrate_drupal', 'options', 'file', 'text', 'migrate_field_plugin_manager_test');
+  public static $modules = ['system', 'user', 'field', 'migrate_drupal', 'options', 'file', 'text', 'migrate_field_plugin_manager_test'];
 
   /**
    * Tests that the correct MigrateField plugins are used.