diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/CustomDirectoryAnnotatedClassDiscoveryTest.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/CustomDirectoryAnnotatedClassDiscoveryTest.php
index c005300..52d4fea 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/CustomDirectoryAnnotatedClassDiscoveryTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/CustomDirectoryAnnotatedClassDiscoveryTest.php
@@ -38,6 +38,37 @@ protected function setUp() {
         'class' => 'Drupal\plugin_test\CustomDirectoryExample2',
         'provider' => 'plugin_test',
       ),
+      'apple' => array(
+        'id' => 'apple',
+        'label' => 'Apple',
+        'color' => 'green',
+        'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Apple',
+        'provider' => 'plugin_test',
+      ),
+      'banana' => array(
+        'id' => 'banana',
+        'label' => 'Banana',
+        'color' => 'yellow',
+        'uses' => array(
+          'bread' => t('Banana bread'),
+        ),
+        'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Banana',
+        'provider' => 'plugin_test',
+      ),
+      'cherry' => array(
+        'id' => 'cherry',
+        'label' => 'Cherry',
+        'color' => 'red',
+        'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Cherry',
+        'provider' => 'plugin_test',
+      ),
+      'orange' => array(
+        'id' => 'orange',
+        'label' => 'Orange',
+        'color' => 'orange',
+        'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Orange',
+        'provider' => 'plugin_test',
+      ),
     );
     $namespaces = new \ArrayObject(array('Drupal\plugin_test' => DRUPAL_ROOT . '/core/modules/system/tests/modules/plugin_test/lib'));
     $this->discovery = new AnnotatedClassDiscovery('', $namespaces);