diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index e23d397..b0c78fd 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -362,7 +362,6 @@ function install_begin_request(&$install_state) {
   $kernel = new DrupalKernel($environment, drupal_classloader(), FALSE);
   $kernel->boot();
 
-  // Enter the request scope and add the Request.
   // @todo Remove this after converting all installer screens into controllers.
   $container = $kernel->getContainer();
   $container->get('request_stack')->push($request);
diff --git a/core/modules/system/src/Tests/Theme/RegistryTest.php b/core/modules/system/src/Tests/Theme/RegistryTest.php
index b2bfd3e..46587b2 100644
--- a/core/modules/system/src/Tests/Theme/RegistryTest.php
+++ b/core/modules/system/src/Tests/Theme/RegistryTest.php
@@ -37,7 +37,6 @@ public static function getInfo() {
   function testRaceCondition() {
     // The theme registry is not marked as persistable in case we don't have a
     // proper request.
-    \Drupal::getContainer()->enterScope('request');
     \Drupal::request()->setMethod('GET');
     $cid = 'test_theme_registry';
 
diff --git a/core/tests/Drupal/Tests/Core/DependencyInjection/ContainerBuilderTest.php b/core/tests/Drupal/Tests/Core/DependencyInjection/ContainerBuilderTest.php
index fcc898f..fae6ea5 100644
--- a/core/tests/Drupal/Tests/Core/DependencyInjection/ContainerBuilderTest.php
+++ b/core/tests/Drupal/Tests/Core/DependencyInjection/ContainerBuilderTest.php
@@ -32,23 +32,6 @@ public static function getInfo() {
   }
 
   /**
-   * Tests set with a synchronized service.
-   */
-  public function testSetOnSynchronizedService() {
-    $container = new ContainerBuilder();
-    $container->register('baz', 'BazClass')
-      ->setSynchronized(TRUE);
-    $container->register('bar', 'BarClass')
-      ->addMethodCall('setBaz', array(new Reference('baz')));
-
-    $container->set('baz', $baz = new \BazClass());
-    $this->assertSame($baz, $container->get('bar')->getBaz());
-
-    $container->set('baz', $baz = new \BazClass());
-    $this->assertSame($baz, $container->get('bar')->getBaz());
-  }
-
-  /**
    * Tests the get method.
    *
    * @see \Drupal\Core\DependencyInjection\Container::get()