diff -u b/core/lib/Drupal/Core/Render/ElementInfoInterface.php b/core/lib/Drupal/Core/Render/ElementInfoInterface.php
--- b/core/lib/Drupal/Core/Render/ElementInfoInterface.php
+++ b/core/lib/Drupal/Core/Render/ElementInfoInterface.php
@@ -2,13 +2,13 @@
 
 /**
  * @file
- * Contains \Drupal\Core\Render\ElementInfoInterface
+ * Contains \Drupal\Core\Render\ElementInfoInterface.
  */
 
 namespace Drupal\Core\Render;
 
 /**
- * Provides available render array element types.
+ * Defines available render array element types.
  */
 interface ElementInfoInterface {
 
diff -u b/core/tests/Drupal/Tests/Core/Render/ElementInfoTest.php b/core/tests/Drupal/Tests/Core/Render/ElementInfoTest.php
--- b/core/tests/Drupal/Tests/Core/Render/ElementInfoTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/ElementInfoTest.php
@@ -19,9 +19,9 @@
 class ElementInfoTest extends UnitTestCase {
 
   /**
-   * The tested element info.
+   * The class under test.
    *
-   * @var ElementInfoInterface
+   * @var \Drupal\Core\Render\ElementInfoInterface
    */
   protected $elementInfo;