diff -u b/core/lib/Drupal/Core/Cache/MemoryBackend.php b/core/lib/Drupal/Core/Cache/MemoryBackend.php
--- b/core/lib/Drupal/Core/Cache/MemoryBackend.php
+++ b/core/lib/Drupal/Core/Cache/MemoryBackend.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Drupal\Core\Cache;
+
 use Drupal\Component\Serialization\SerializationInterface;
 
 /**
diff -u b/core/modules/hal/tests/src/Kernel/FileNormalizeTest.php b/core/modules/hal/tests/src/Kernel/FileNormalizeTest.php
--- b/core/modules/hal/tests/src/Kernel/FileNormalizeTest.php
+++ b/core/modules/hal/tests/src/Kernel/FileNormalizeTest.php
@@ -36,7 +36,8 @@
     $this->installEntitySchema('file');
 
     $entity_manager = \Drupal::entityManager();
-    $link_manager = new LinkManager(new TypeLinkManager(new MemoryBackend(new PhpSerialize()), \Drupal::moduleHandler(), \Drupal::service('config.factory'), \Drupal::service('request_stack'), \Drupal::service('entity_type.bundle.info')), new RelationLinkManager(new MemoryBackend(), $entity_manager, \Drupal::moduleHandler(), \Drupal::service('config.factory'), \Drupal::service('request_stack')));
+    $php_serialize = new PhpSerialize();
+    $link_manager = new LinkManager(new TypeLinkManager(new MemoryBackend($php_serialize), \Drupal::moduleHandler(), \Drupal::service('config.factory'), \Drupal::service('request_stack'), \Drupal::service('entity_type.bundle.info')), new RelationLinkManager(new MemoryBackend($php_serialize), $entity_manager, \Drupal::moduleHandler(), \Drupal::service('config.factory'), \Drupal::service('request_stack')));
 
     // Set up the mock serializer.
     $normalizers = array(
only in patch2:
unchanged:
--- a/core/tests/Drupal/KernelTests/Core/Command/DbDumpTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Command/DbDumpTest.php
@@ -69,6 +69,7 @@ class DbDumpTest extends KernelTestBase {
   public function register(ContainerBuilder $container) {
     parent::register($container);
     $container->register('cache_factory', 'Drupal\Core\Cache\DatabaseBackendFactory')
+      ->addArgument(new Reference('serialization.phpserialize'))
       ->addArgument(new Reference('database'))
       ->addArgument(new Reference('cache_tags.invalidator.checksum'));
   }
only in patch2:
unchanged:
--- a/core/tests/Drupal/KernelTests/Core/Config/Storage/CachedStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/Storage/CachedStorageTest.php
@@ -87,6 +87,7 @@ public function containerBuild(ContainerBuilder $container) {
     parent::containerBuild($container);
     // Use the regular database cache backend to aid testing.
     $container->register('cache_factory', 'Drupal\Core\Cache\DatabaseBackendFactory')
+      ->addArgument(new Reference('serialization.phpserialize'))
       ->addArgument(new Reference('database'))
       ->addArgument(new Reference('cache_tags.invalidator.checksum'));
   }