diff --git a/core/lib/Drupal/Core/Config/StorageComparer.php b/core/lib/Drupal/Core/Config/StorageComparer.php
index 224136f..bf071de 100644
--- a/core/lib/Drupal/Core/Config/StorageComparer.php
+++ b/core/lib/Drupal/Core/Config/StorageComparer.php
@@ -101,12 +101,12 @@ class StorageComparer implements StorageComparerInterface {
   public function __construct(StorageInterface $source_storage, StorageInterface $target_storage, ConfigManagerInterface $config_manager) {
     // Wrap the storages in a static cache so that multiple reads of the same
     // raw configuration object are not costly.
-    $this->sourceCacheStorage = new MemoryBackend(__CLASS__ . '::source');
+    $this->sourceCacheStorage = new MemoryBackend();
     $this->sourceStorage = new CachedStorage(
       $source_storage,
       $this->sourceCacheStorage
     );
-    $this->targetCacheStorage = new MemoryBackend(__CLASS__ . '::target');
+    $this->targetCacheStorage = new MemoryBackend();
     $this->targetStorage = new CachedStorage(
       $target_storage,
       $this->targetCacheStorage
diff --git a/core/modules/system/src/Tests/System/FloodTest.php b/core/modules/system/src/Tests/System/FloodTest.php
index a3a3368..fdb2d24 100644
--- a/core/modules/system/src/Tests/System/FloodTest.php
+++ b/core/modules/system/src/Tests/System/FloodTest.php
@@ -60,8 +60,7 @@ public function testMemoryBackend() {
     $window_expired = -1;
     $name = 'flood_test_cleanup';
 
-    $request_stack = \Drupal::service('request_stack');
-    $flood = new MemoryBackend($request_stack);
+    $flood = new MemoryBackend();
     // Register expired event.
     $flood->register($name, $window_expired);
     // Verify event is not allowed.
diff --git a/core/tests/Drupal/KernelTests/Core/Cache/MemoryBackendTest.php b/core/tests/Drupal/KernelTests/Core/Cache/MemoryBackendTest.php
index c1fb9f7..4518532 100644
--- a/core/tests/Drupal/KernelTests/Core/Cache/MemoryBackendTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Cache/MemoryBackendTest.php
@@ -18,7 +18,7 @@ class MemoryBackendTest extends GenericCacheBackendUnitTestBase {
    *   A new MemoryBackend object.
    */
   protected function createCacheBackend($bin) {
-    $backend = new MemoryBackend($bin);
+    $backend = new MemoryBackend();
     \Drupal::service('cache_tags.invalidator')->addInvalidator($backend);
     return $backend;
   }
diff --git a/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php b/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php
index 107cb2e..6ed63aa 100644
--- a/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php
@@ -106,7 +106,7 @@ protected function setUp() {
     $this->languageManager->expects($this->any())
       ->method('getCurrentLanguage')
       ->will($this->onConsecutiveCalls($english, $english, $japanese, $japanese));
-    $this->cache = new TestMemoryBackend('llama');
+    $this->cache = new TestMemoryBackend();
 
     $this->assetResolver = new AssetResolver($this->libraryDiscovery, $this->libraryDependencyResolver, $this->moduleHandler, $this->themeManager, $this->languageManager, $this->cache);
   }