diff --git a/core/lib/Drupal/Core/Ajax/AjaxResponseAttachmentsProcessor.php b/core/lib/Drupal/Core/Ajax/AjaxResponseAttachmentsProcessor.php
index 054bf84ab3..0c13370d7f 100644
--- a/core/lib/Drupal/Core/Ajax/AjaxResponseAttachmentsProcessor.php
+++ b/core/lib/Drupal/Core/Ajax/AjaxResponseAttachmentsProcessor.php
@@ -71,13 +71,6 @@ class AjaxResponseAttachmentsProcessor implements AttachmentsResponseProcessorIn
    */
   protected $moduleHandler;
 
-  /**
-   * The language manager.
-   *
-   * @var \Drupal\Core\Language\LanguageManagerInterface
-   */
-  protected $languageManager;
-
   /**
    * Constructs an AjaxResponseAttachmentsProcessor object.
    *
@@ -95,10 +88,10 @@ class AjaxResponseAttachmentsProcessor implements AttachmentsResponseProcessorIn
    *   The renderer.
    * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
    *   The module handler.
-   * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+   * @param \Drupal\Core\Language\LanguageManagerInterface $languageManager
    *   The language manager.
    */
-  public function __construct(AssetResolverInterface $asset_resolver, ConfigFactoryInterface $config_factory, AssetCollectionRendererInterface $css_collection_renderer, AssetCollectionRendererInterface $js_collection_renderer, RequestStack $request_stack, RendererInterface $renderer, ModuleHandlerInterface $module_handler, LanguageManagerInterface $language_manager = NULL) {
+  public function __construct(AssetResolverInterface $asset_resolver, ConfigFactoryInterface $config_factory, AssetCollectionRendererInterface $css_collection_renderer, AssetCollectionRendererInterface $js_collection_renderer, RequestStack $request_stack, RendererInterface $renderer, ModuleHandlerInterface $module_handler, protected LanguageManagerInterface $languageManager) {
     $this->assetResolver = $asset_resolver;
     $this->config = $config_factory->get('system.performance');
     $this->cssCollectionRenderer = $css_collection_renderer;
@@ -106,11 +99,10 @@ public function __construct(AssetResolverInterface $asset_resolver, ConfigFactor
     $this->requestStack = $request_stack;
     $this->renderer = $renderer;
     $this->moduleHandler = $module_handler;
-    if (!isset($language_manager)) {
+    if (!isset($languageManager)) {
       @trigger_error('Calling ' . __METHOD__ . '() without the $language_manager argument is deprecated in drupal:10.1.0 and will be required in drupal:11.0.0', E_USER_DEPRECATED);
-      $language_manager = \Drupal::languageManager();
+      $this->languageManager = \Drupal::languageManager();
     }
-    $this->languageManager = $language_manager;
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Asset/AssetDumper.php b/core/lib/Drupal/Core/Asset/AssetDumper.php
index 1d12d5da35..91360e5bc4 100644
--- a/core/lib/Drupal/Core/Asset/AssetDumper.php
+++ b/core/lib/Drupal/Core/Asset/AssetDumper.php
@@ -47,7 +47,7 @@ public function dump($data, $file_extension) {
   /**
    * {@inheritdoc}
    */
-  public function dumpToUri($data, $file_extension, $uri): string {
+  public function dumpToUri(string $data, string $file_extension, string $uri): string {
     $path = 'public://' . $file_extension;
     // Create the CSS or JS file.
     $this->fileSystem->prepareDirectory($path, FileSystemInterface::CREATE_DIRECTORY);
diff --git a/core/lib/Drupal/Core/Asset/AssetDumperUriInterface.php b/core/lib/Drupal/Core/Asset/AssetDumperUriInterface.php
index 72758d817a..cf7085fef7 100644
--- a/core/lib/Drupal/Core/Asset/AssetDumperUriInterface.php
+++ b/core/lib/Drupal/Core/Asset/AssetDumperUriInterface.php
@@ -20,6 +20,6 @@ interface AssetDumperUriInterface extends AssetDumperInterface {
    * @return string
    *   An URI to access the dumped asset.
    */
-  public function dumpToUri($data, $file_extension, $uri): string;
+  public function dumpToUri(string $data, string $file_extension, string $uri): string;
 
 }
diff --git a/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php b/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php
index 95b53422e1..c932f84181 100644
--- a/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php
+++ b/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php
@@ -81,13 +81,6 @@ class HtmlResponseAttachmentsProcessor implements AttachmentsResponseProcessorIn
    */
   protected $moduleHandler;
 
-  /**
-   * The language manager.
-   *
-   * @var \Drupal\Core\Language\LanguageManagerInterface
-   */
-  protected $languageManager;
-
   /**
    * Constructs a HtmlResponseAttachmentsProcessor object.
    *
@@ -105,10 +98,10 @@ class HtmlResponseAttachmentsProcessor implements AttachmentsResponseProcessorIn
    *   The renderer.
    * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
    *   The module handler service.
-   * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+   * @param \Drupal\Core\Language\LanguageManagerInterface $languageManager
    *   The language manager.
    */
-  public function __construct(AssetResolverInterface $asset_resolver, ConfigFactoryInterface $config_factory, AssetCollectionRendererInterface $css_collection_renderer, AssetCollectionRendererInterface $js_collection_renderer, RequestStack $request_stack, RendererInterface $renderer, ModuleHandlerInterface $module_handler, LanguageManagerInterface $language_manager) {
+  public function __construct(AssetResolverInterface $asset_resolver, ConfigFactoryInterface $config_factory, AssetCollectionRendererInterface $css_collection_renderer, AssetCollectionRendererInterface $js_collection_renderer, RequestStack $request_stack, RendererInterface $renderer, ModuleHandlerInterface $module_handler, protected LanguageManagerInterface $languageManager) {
     $this->assetResolver = $asset_resolver;
     $this->config = $config_factory->get('system.performance');
     $this->cssCollectionRenderer = $css_collection_renderer;
@@ -116,11 +109,10 @@ public function __construct(AssetResolverInterface $asset_resolver, ConfigFactor
     $this->requestStack = $request_stack;
     $this->renderer = $renderer;
     $this->moduleHandler = $module_handler;
-    if (!isset($language_manager)) {
-      @trigger_error('Calling ' . __METHOD__ . '() without the $language_manager argument is deprecated in drupal:10.1.0 and will be required in drupal:11.0.0', E_USER_DEPRECATED);
-      $language_manager = \Drupal::languageManager();
+    if (!isset($languageManager)) {
+      @trigger_error('Calling ' . __METHOD__ . '() without the $languageManager argument is deprecated in drupal:10.1.0 and will be required in drupal:11.0.0', E_USER_DEPRECATED);
+      $this->languageManager = \Drupal::languageManager();
     }
-    $this->languageManager = $language_manager;
   }
 
   /**
diff --git a/core/phpstan-baseline.neon b/core/phpstan-baseline.neon
index 50c770ed62..3fe6bec6b1 100644
--- a/core/phpstan-baseline.neon
+++ b/core/phpstan-baseline.neon
@@ -100,16 +100,6 @@ parameters:
 			count: 1
 			path: lib/Drupal/Core/Archiver/ArchiverManager.php
 
-		-
-			message: "#^Call to deprecated constant REQUEST_TIME\\: Deprecated in drupal\\:8\\.3\\.0 and is removed from drupal\\:10\\.0\\.0\\. Use \\\\Drupal\\:\\:time\\(\\)\\-\\>getRequestTime\\(\\); $#"
-			count: 1
-			path: lib/Drupal/Core/Asset/CssCollectionOptimizer.php
-
-		-
-			message: "#^Call to deprecated constant REQUEST_TIME\\: Deprecated in drupal\\:8\\.3\\.0 and is removed from drupal\\:10\\.0\\.0\\. Use \\\\Drupal\\:\\:time\\(\\)\\-\\>getRequestTime\\(\\); $#"
-			count: 1
-			path: lib/Drupal/Core/Asset/JsCollectionOptimizer.php
-
 		-
 			message: "#^Call to deprecated constant REQUEST_TIME\\: Deprecated in drupal\\:8\\.3\\.0 and is removed from drupal\\:10\\.0\\.0\\. Use \\\\Drupal\\:\\:time\\(\\)\\-\\>getRequestTime\\(\\); $#"
 			count: 1
diff --git a/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php b/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php
index cc3f12bc5b..b2589385ab 100644
--- a/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php
@@ -11,6 +11,7 @@
 use Drupal\Core\Asset\AttachedAssets;
 use Drupal\Core\Asset\AttachedAssetsInterface;
 use Drupal\Core\Cache\MemoryBackend;
+use Drupal\Core\Language\LanguageInterface;
 use Drupal\Tests\UnitTestCase;
 
 /**
@@ -71,12 +72,12 @@ class AssetResolverTest extends UnitTestCase {
   /**
    * A mocked English language object.
    */
-  protected $english;
+  protected LanguageInterface $english;
 
   /**
    * A mocked Japanese language object.
    */
-  protected $japanese;
+  protected LanguageInterface $japanese;
 
   /**
    * {@inheritdoc}
diff --git a/core/tests/Drupal/Tests/Core/Asset/CssCollectionOptimizerLazyUnitTest.php b/core/tests/Drupal/Tests/Core/Asset/CssCollectionOptimizerLazyUnitTest.php
index 9371d9dc9c..9f2e029dce 100644
--- a/core/tests/Drupal/Tests/Core/Asset/CssCollectionOptimizerLazyUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/CssCollectionOptimizerLazyUnitTest.php
@@ -23,20 +23,6 @@
  */
 class CssCollectionOptimizerLazyUnitTest extends UnitTestCase {
 
-  /**
-   * The data from the dumper.
-   *
-   * @var string
-   */
-  protected $dumperData;
-
-  /**
-   * A CSS Collection optimizer.
-   *
-   * @var \Drupal\Core\Asset\AssetCollectionOptimizerInterface
-   */
-  protected $optimizer;
-
   /**
    * Tests that CSS imports with strange letters do not destroy the CSS output.
    */
@@ -66,8 +52,8 @@ public function testCssImport(): void {
     $mock_file_url_generator = $this->createMock(FileUrlGeneratorInterface::class);
     $mock_time = $this->createMock(TimeInterface::class);
     $mock_language = $this->createMock(LanguageManagerInterface::class);
-    $this->optimizer = new CssCollectionOptimizerLazy($mock_grouper, $mock_optimizer, $mock_theme_manager, $mock_dependency_resolver, new RequestStack(), $mock_state, $mock_file_system, $mock_config_factory, $mock_file_url_generator, $mock_time, $mock_language);
-    $aggregate = $this->optimizer->optimizeGroup(
+    $optimizer = new CssCollectionOptimizerLazy($mock_grouper, $mock_optimizer, $mock_theme_manager, $mock_dependency_resolver, new RequestStack(), $mock_state, $mock_file_system, $mock_config_factory, $mock_file_url_generator, $mock_time, $mock_language);
+    $aggregate = $optimizer->optimizeGroup(
       [
         'items' => [
           'core/modules/system/tests/modules/common_test/common_test_css_import.css' => [