diff --git a/core/modules/simpletest/src/Tests/KernelTestBaseTest.php b/core/modules/simpletest/src/Tests/KernelTestBaseTest.php
index 1e482b9..dd530f7 100644
--- a/core/modules/simpletest/src/Tests/KernelTestBaseTest.php
+++ b/core/modules/simpletest/src/Tests/KernelTestBaseTest.php
@@ -29,6 +29,7 @@ class KernelTestBaseTest extends KernelTestBase {
   protected function setUp() {
     $original_container = \Drupal::getContainer();
     parent::setUp();
+    $this->installSchema('system', array('router'));
     $this->assertNotIdentical(\Drupal::getContainer(), $original_container, 'KernelTestBase test creates a new container.');
   }
 
@@ -36,7 +37,7 @@ protected function setUp() {
    * Tests expected behavior of setUp().
    */
   function testSetUp() {
-    $modules = array('entity_test');
+    $modules = array('entity_test', 'system');
     $table = 'entity_test';
 
     // Verify that specified $modules have been loaded.
diff --git a/core/modules/user/src/Tests/Views/UserUnitTestBase.php b/core/modules/user/src/Tests/Views/UserUnitTestBase.php
index 672bae7..433719f 100644
--- a/core/modules/user/src/Tests/Views/UserUnitTestBase.php
+++ b/core/modules/user/src/Tests/Views/UserUnitTestBase.php
@@ -49,7 +49,6 @@ protected function setUp() {
     ViewTestData::createTestViews(get_class($this), array('user_test_views'));
 
     $this->installEntitySchema('user');
-    $this->installSchema('system', 'sequences');
 
     $entity_manager = $this->container->get('entity.manager');
     $this->roleStorage = $entity_manager->getStorage('user_role');
diff --git a/core/tests/Drupal/Tests/Core/Routing/NullRouteBuilder.php b/core/tests/Drupal/Tests/Core/Routing/NullRouteBuilder.php
index 9db7e45..acc2f60 100644
--- a/core/tests/Drupal/Tests/Core/Routing/NullRouteBuilder.php
+++ b/core/tests/Drupal/Tests/Core/Routing/NullRouteBuilder.php
@@ -6,6 +6,9 @@
 
 class NullRouteBuilder implements RouteBuilderInterface {
 
+  public function setRebuildNeeded() {
+  }
+
   public function rebuild() {
   }