diff --git a/core/modules/system/lib/Drupal/system/Tests/System/FloodTest.php b/core/modules/system/lib/Drupal/system/Tests/System/FloodTest.php
index 550fd89..02bb177 100644
--- a/core/modules/system/lib/Drupal/system/Tests/System/FloodTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/System/FloodTest.php
@@ -14,6 +14,14 @@
  * Functional tests for the flood control mechanism.
  */
 class FloodTest extends WebTestBase {
+
+  /**
+   * The Request object that flood classes should use.
+   *
+   * @var \Symfony\Component\HttpFoundation\Request
+   */
+  protected $request;
+
   public static function getInfo() {
     return array(
       'name' => 'Flood control mechanism',
@@ -22,6 +30,16 @@ public static function getInfo() {
     );
   }
 
+  public function setUp() {
+    parent::setUp();
+
+    // Flood backends need a request object. Create a dummy one and insert it
+    // to the container.
+    $this->request = Request::create('http://example.com/');
+    $this->request->server->set('REMOTE_ADDR', '3.3.3.3');
+    $this->container->set('request', $this->request);
+  }
+
   /**
    * Test flood control mechanism clean-up.
    */
@@ -56,10 +74,7 @@ function testMemoryBackend() {
     $window_expired = -1;
     $name = 'flood_test_cleanup';
 
-    // MemoryBackend needs a request object injected.
-    $request = Request::create('http://example.com/');
-    $request->server->set('REMOTE_ADDR', '3.3.3.3');
-    $flood = new \Drupal\Core\Flood\MemoryBackend($request);
+    $flood = new \Drupal\Core\Flood\MemoryBackend($this->request);
     // Register expired event.
     $flood->register($name, $window_expired);
     // Verify event is not allowed.