diff --git a/core/lib/Drupal/Core/Cache/CacheBackendInterface.php b/core/lib/Drupal/Core/Cache/CacheBackendInterface.php
index 9ecb3fbae7..975f8bf1a4 100644
--- a/core/lib/Drupal/Core/Cache/CacheBackendInterface.php
+++ b/core/lib/Drupal/Core/Cache/CacheBackendInterface.php
@@ -33,7 +33,7 @@
    *   The "valid" property of the returned object indicates whether the item is
    *   valid or not. Defaults to FALSE.
    *
-   * @return \Drupal\Core\Cache\CacheItem|false
+   * @return \Drupal\Core\Cache\CacheItemInterface|false
    *   The cache item or FALSE on failure.
    *
    * @see \Drupal\Core\Cache\CacheBackendInterface::getMultiple()
@@ -55,7 +55,7 @@ public function get($cid, $allow_invalid = FALSE);
    *   "valid" property of the returned objects indicates whether the items are
    *   valid or not. Defaults to FALSE.
    *
-   * @return \Drupal\Core\Cache\CacheItem[]
+   * @return \Drupal\Core\Cache\CacheItemInterface[]
    *   An array of cache item objects indexed by cache ID.
    *
    * @see \Drupal\Core\Cache\CacheBackendInterface::get()
diff --git a/core/lib/Drupal/Core/Cache/CacheItem.php b/core/lib/Drupal/Core/Cache/CacheItem.php
index d216a89448..b9d1704ffc 100644
--- a/core/lib/Drupal/Core/Cache/CacheItem.php
+++ b/core/lib/Drupal/Core/Cache/CacheItem.php
@@ -1,10 +1,5 @@
 <?php
 
-/**
- * @file
- * Contains \Drupal\Core\Cache\CacheItem.
- */
-
 namespace Drupal\Core\Cache;
 
 /**
diff --git a/core/lib/Drupal/Core/Cache/CacheItemInterface.php b/core/lib/Drupal/Core/Cache/CacheItemInterface.php
index e066345e54..1db8306677 100644
--- a/core/lib/Drupal/Core/Cache/CacheItemInterface.php
+++ b/core/lib/Drupal/Core/Cache/CacheItemInterface.php
@@ -1,14 +1,9 @@
 <?php
 
-/**
- * @file
- * Contains \Drupal\Core\Cache\CacheItemInterface.
- */
-
 namespace Drupal\Core\Cache;
 
 /**
- * Defines a cache item.
+ * Defines an interface for cache item value objects.
  */
 interface CacheItemInterface {