diff --git a/core/lib/Drupal/Core/Access/AccessResultReasonInterface.php b/core/lib/Drupal/Core/Access/AccessResultReasonInterface.php
index fa3eab0..30be5f8 100644
--- a/core/lib/Drupal/Core/Access/AccessResultReasonInterface.php
+++ b/core/lib/Drupal/Core/Access/AccessResultReasonInterface.php
@@ -5,17 +5,17 @@
 /**
  * Interface for access result value objects with stored reason for developers.
  *
- * For example, a developer can specify the reason of an  access rejection :
+ * For example, a developer can specify the reason for forbidden access:
  * <code>
- * new AccessResultForbidden('You\'re not authorized to hack core');
+ * new AccessResultForbidden('You are not authorized to hack core');
  * </code>
  *
- * @see AccessResultForbidden
+ * @see \Drupal\Core\Access\AccessResultInterface
  */
 interface AccessResultReasonInterface extends AccessResultInterface {
 
   /**
-   * Gets the reason of this access result.
+   * Gets the reason for this access result.
    *
    * @return string|NULL
    *   The reason of this access result or NULL if no reason is provided.
@@ -23,12 +23,12 @@
   public function getReason();
 
   /**
-   * Sets the reason of this access result.
+   * Sets the reason for this access result.
    *
    * @param $reason string|NULL
    *   The reason of this access result or NULL if no reason is provided.
    *
-   * @return AccessResultInterface
+   * @return \Drupal\Core\Access\AccessResultInterface
    *   The access result instance.
    */
   public function setReason($reason);
diff --git a/core/tests/Drupal/Tests/Core/Access/AccessResultForbiddenTest.php b/core/tests/Drupal/Tests/Core/Access/AccessResultForbiddenTest.php
index 3c079c8..7b5c982 100644
--- a/core/tests/Drupal/Tests/Core/Access/AccessResultForbiddenTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/AccessResultForbiddenTest.php
@@ -1,10 +1,5 @@
 <?php
 
-/**
- * @file
- * Contains \Drupal\Tests\Core\Access\AccessResultTest.
- */
-
 namespace Drupal\Tests\Core\Access;
 
 use Drupal\Core\Access\AccessResultForbidden;
diff --git a/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php b/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php
index df3b580..dccda5c 100644
--- a/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php
@@ -8,6 +8,7 @@
 use Drupal\Tests\UnitTestCase;
 use Symfony\Cmf\Component\Routing\RouteObjectInterface;
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
 use Symfony\Component\Routing\Route;
 
 /**
@@ -106,6 +107,22 @@ public function testMatchRequestDenied() {
   }
 
   /**
+   * Tests the matchRequest() function for access denied with specific reason message.
+   */
+  public function testCheckAccessResultWithReason() {
+    $this->setupRouter();
+    $request = new Request();
+    $reason = $this->getRandomGenerator()->string();
+    $access_result = AccessResult::forbidden($reason);
+    $this->accessManager->expects($this->once())
+      ->method('checkRequest')
+      ->with($request)
+      ->willReturn($access_result);
+    $this->setExpectedException(AccessDeniedHttpException::class, $reason);
+    $this->router->matchRequest($request);
+  }
+
+  /**
    * Ensure that methods are passed to the wrapped router.
    *
    * @covers ::__call