diff --git a/core/modules/system/src/Tests/HttpKernel/StackKernelIntegrationTest.php b/core/modules/system/src/Tests/HttpKernel/StackKernelIntegrationTest.php
index 6018122..56ad6fc 100644
--- a/core/modules/system/src/Tests/HttpKernel/StackKernelIntegrationTest.php
+++ b/core/modules/system/src/Tests/HttpKernel/StackKernelIntegrationTest.php
@@ -7,8 +7,9 @@
 
 namespace Drupal\system\Tests\HttpKernel;
 
-use Drupal\simpletest\KernelTestBase;
+use Drupal\Component\Utility\SafeMarkup;
 use Drupal\Core\Url;
+use Drupal\simpletest\KernelTestBase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 
@@ -49,4 +50,17 @@ public function testRequest() {
     $this->assertEqual($request->attributes->get('_previous_optional_argument'), 'test_argument');
   }
 
+  /**
+   * Tests that late middlewares are marked as lazy.
+   */
+  public function testLateMiddlewareShouldBeLazy() {
+    foreach ($this->container->findTaggedServiceIds('http_middleware') as $id => $attributes) {
+      $priority = isset($attributes[0]['priority']) ? $attributes[0]['priority'] : 0;
+      $definition = $this->container->getDefinition($id);
+      if ($priority < 0) {
+        $this->assertTrue($definition->isLazy(), SafeMarkup::format('The lazy flag is set on low priority middleware "@id"', array('@id' => $id)));
+      }
+    }
+  }
+
 }