diff --git a/core/modules/locale/tests/modules/locale_test/lib/Drupal/locale_test/LocaleTestBundle.php b/core/modules/locale/tests/modules/locale_test/lib/Drupal/locale_test/LocaleTestBundle.php
index 75819f4..c9baa25 100644
--- a/core/modules/locale/tests/modules/locale_test/lib/Drupal/locale_test/LocaleTestBundle.php
+++ b/core/modules/locale/tests/modules/locale_test/lib/Drupal/locale_test/LocaleTestBundle.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\locale_test\LocaleTestBundle.
+ * Contains \Drupal\locale_test\LocaleTestBundle.
  *
  * This is a workaround to make sure the 'Last-Modified' HTTP header is not
  * overridden by FinishResponseSubscriber. 'Last-Modified' is set when a remote
@@ -21,11 +21,12 @@
 class LocaleTestBundle extends Bundle {
 
   /**
-   * Overrides Symfony\Component\HttpKernel\Bundle\Bundle::build().
+   * {@inheritdoc}
    */
   public function build(ContainerBuilder $container) {
     // Register our response subscriber to handle finished responses.
     $container->register('locale_test_finish_response_subscriber', 'Drupal\locale_test\LocaleTestFinishResponseSubscriber')
       ->addTag('event_subscriber');
   }
+
 }
diff --git a/core/modules/locale/tests/modules/locale_test/lib/Drupal/locale_test/LocaleTestFinishResponseSubscriber.php b/core/modules/locale/tests/modules/locale_test/lib/Drupal/locale_test/LocaleTestFinishResponseSubscriber.php
index b9b4a7e..74b6cb6 100644
--- a/core/modules/locale/tests/modules/locale_test/lib/Drupal/locale_test/LocaleTestFinishResponseSubscriber.php
+++ b/core/modules/locale/tests/modules/locale_test/lib/Drupal/locale_test/LocaleTestFinishResponseSubscriber.php
@@ -2,17 +2,18 @@
 
 /**
  * @file
- * Definition of Drupal\locale_test\LocaleTestFinishResponseSubscriber.
+ * Contains of \Drupal\locale_test\LocaleTestFinishResponseSubscriber.
  *
  * This is a workaround to make sure the 'Last-Modified' HTTP header is not
  * overridden by FinishResponseSubscriber. 'Last-Modified' is set when a remote
  * translation file is served via a menu callback. So this is a new event
  * subscriber which saves the value and sets it back.
- * It does so with the saveLastModified() method which has a very high priority,
- * so it can save the defined header really early in a class property. Then
- * later on the setLastModified() method can set the header again using the
- * value from this property, since it has a very low priority, it can manipulate
- * the header after FinishResponseSubscriber has done its changes.
+ *
+ * This uses the saveLastModified() method which has a very high priority, so it
+ * can save the defined header really early in a class property. Then later on
+ * the setLastModified() method can set the header again using the value from
+ * this property, which has a very low priority, so it can manipulate the header
+ * after FinishResponseSubscriber has done its changes.
  */
 
 namespace Drupal\locale_test;
@@ -26,6 +27,11 @@
  */
 class LocaleTestFinishResponseSubscriber implements EventSubscriberInterface {
 
+  /**
+   * The 'Last-Modified' HTTP header.
+   *
+   * @var string
+   */
   public $lastModified;
 
   /**
@@ -42,6 +48,9 @@ public static function getSubscribedEvents() {
 
   /**
    * Saves the 'Last-Modified' HTTP header in a class property.
+   *
+   * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event
+   *   The event where a translation file was served.
    */
   public function saveLastModified(FilterResponseEvent $event) {
     $this->lastModified = $event->getResponse()->headers->get('Last-Modified');
@@ -49,10 +58,14 @@ public function saveLastModified(FilterResponseEvent $event) {
 
   /**
    * Sets the 'Last-Modified' HTTP header to the response.
+   *
+   * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event
+   *   The event where a translation file was served.
    */
   public function setLastModified(FilterResponseEvent $event) {
     if (!empty($this->lastModified)) {
       $event->getResponse()->headers->set('Last-Modified', $this->lastModified);
     }
   }
+
 }
diff --git a/core/modules/locale/tests/modules/locale_test/locale_test.info.yml b/core/modules/locale/tests/modules/locale_test/locale_test.info.yml
index 73cf050..8490e1a 100644
--- a/core/modules/locale/tests/modules/locale_test/locale_test.info.yml
+++ b/core/modules/locale/tests/modules/locale_test/locale_test.info.yml
@@ -7,4 +7,4 @@ hidden: true
 'interface translation project': locale_test
 'interface translation server pattern': core/modules/locale/test/test.%language.po
 dependencies:
-  - locale
\ No newline at end of file
+  - locale
diff --git a/core/modules/locale/tests/modules/locale_test_contrib_one/locale_test_contrib_one.info.yml b/core/modules/locale/tests/modules/locale_test_contrib_one/locale_test_contrib_one.info.yml
index 73cf050..8490e1a 100644
--- a/core/modules/locale/tests/modules/locale_test_contrib_one/locale_test_contrib_one.info.yml
+++ b/core/modules/locale/tests/modules/locale_test_contrib_one/locale_test_contrib_one.info.yml
@@ -7,4 +7,4 @@ hidden: true
 'interface translation project': locale_test
 'interface translation server pattern': core/modules/locale/test/test.%language.po
 dependencies:
-  - locale
\ No newline at end of file
+  - locale