diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/AnnotatedClassDiscoveryTest.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
index 5f8ee2d..3a4d98b 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
@@ -38,6 +38,11 @@ public function setUp() {
         'color' => 'yellow',
         'uses' => array(
           'bread' => t('Banana bread'),
+          'loaf' => array(
+            'singular' => '1 loaf',
+            'plural' => '@count loafs',
+            'generic' => t('loafs'),
+          ),
         ),
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Banana',
         'provider' => 'plugin_test',
diff --git a/core/modules/system/tests/modules/plugin_test/lib/Drupal/plugin_test/Plugin/plugin_test/fruit/Banana.php b/core/modules/system/tests/modules/plugin_test/lib/Drupal/plugin_test/Plugin/plugin_test/fruit/Banana.php
index 55f1d12..73f6996 100644
--- a/core/modules/system/tests/modules/plugin_test/lib/Drupal/plugin_test/Plugin/plugin_test/fruit/Banana.php
+++ b/core/modules/system/tests/modules/plugin_test/lib/Drupal/plugin_test/Plugin/plugin_test/fruit/Banana.php
@@ -9,6 +9,7 @@
 
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Annotation\PluralTranslation;
 
 /**
  * @Plugin(
@@ -16,7 +17,12 @@
  *   label = "Banana",
  *   color = "yellow",
  *   uses = {
- *     "bread" = @Translation("Banana bread")
+ *     "bread" = @Translation("Banana bread"),
+ *     "loaf" = @PluralTranslation(
+ *       singular = "1 loaf",
+ *       plural = "@count loafs",
+ *       generic = "loafs"
+ *     )
  *   }
  * )
  */
diff --git a/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php b/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
index bd6ba26..6eb403d 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
@@ -59,6 +59,11 @@ protected function setUp() {
         'color' => 'yellow',
         'uses' => array(
           'bread' => 'Banana bread',
+          'loaf' => array(
+            'singular' => '1 loaf',
+            'plural' => '@count loafs',
+            'generic' => t('loafs'),
+          ),
         ),
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Banana',
       ),