diff --git a/core/modules/basic_auth/basic_auth.info.yml b/core/modules/basic_auth/basic_auth.info.yml
index 38bb7b2..1cf687b 100644
--- a/core/modules/basic_auth/basic_auth.info.yml
+++ b/core/modules/basic_auth/basic_auth.info.yml
@@ -4,3 +4,5 @@ description: 'Provides the HTTP Basic authentication provider'
 package: Web services
 version: VERSION
 core: 8.x
+dependencies:
+  - user
diff --git a/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php b/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php
index b5c363c..9132e9f 100644
--- a/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php
@@ -202,7 +202,7 @@ function testSettings() {
     $endToken = '}';
     $start = strpos($rendered_js, $startToken);
     $end = strrpos($rendered_js, $endToken);
-    $json  = Unicode::substr($rendered_js, $start, $end - $start + 1);
+    $json  = Unicode::substr((string) $rendered_js, $start, $end - $start + 1);
     $parsed_settings = Json::decode($json);
 
     // Test whether the settings for core/drupalSettings are available.
diff --git a/core/tests/Drupal/KernelTests/Core/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php b/core/tests/Drupal/KernelTests/Core/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php
index 4b6fcfb..7b5d4d0 100644
--- a/core/tests/Drupal/KernelTests/Core/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php
@@ -86,6 +86,11 @@ class ResolvedLibraryDefinitionsFilesMatchTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
+  public static $modules = ['system'];
+
+  /**
+   * {@inheritdoc}
+   */
   protected function setUp() {
     parent::setUp();
 
@@ -110,7 +115,8 @@ protected function setUp() {
     });
     $this->allModules = array_keys($all_modules);
     sort($this->allModules);
-    $this->enableModules($this->allModules);
+    print_r($this->allModules);
+    $this->container->get('module_installer')->install($this->allModules);
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTagTest.php b/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTagTest.php
index e2a4df7..484ee9c 100644
--- a/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTagTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTagTest.php
@@ -24,8 +24,8 @@ class DatabaseBackendTagTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public function containerBuild(ContainerBuilder $container) {
-    parent::containerBuild($container);
+  public function register(ContainerBuilder $container) {
+    parent::register($container);
     // Change container to database cache backends.
     $container
       ->register('cache_factory', 'Drupal\Core\Cache\CacheFactory')
diff --git a/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelSiteTest.php b/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelSiteTest.php
index 7ce1153..deea2a9 100644
--- a/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelSiteTest.php
+++ b/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelSiteTest.php
@@ -18,7 +18,7 @@ class DrupalKernelSiteTest extends KernelTestBase {
   public function testServicesYml() {
     $container_yamls = Settings::get('container_yamls');
     $container_yamls[] = $this->siteDirectory . '/services.yml';
-    $this->settingsSet('container_yamls', $container_yamls);
+    $this->setSetting('container_yamls', $container_yamls);
     $this->assertFalse($this->container->has('site.service.yml'));
     // A service provider class always has precedence over services.yml files.
     // KernelTestBase::buildContainer() swaps out many services with in-memory
diff --git a/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php b/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php
index 55626aa..8eadd70 100644
--- a/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php
+++ b/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php
@@ -22,7 +22,7 @@ protected function setUp() {
     // the DrupalKernel (re-)building itself.
     $this->prepareConfigDirectories();
 
-    $this->settingsSet('php_storage', array('service_container' => array(
+    $this->setSetting('php_storage', array('service_container' => array(
       'bin' => 'service_container',
       'class' => 'Drupal\Component\PhpStorage\MTimeProtectedFileStorage',
       'directory' => DRUPAL_ROOT . '/' . $this->publicFilesDirectory . '/php',
diff --git a/core/tests/Drupal/KernelTests/Core/File/FileTestBase.php b/core/tests/Drupal/KernelTests/Core/File/FileTestBase.php
index 7d33ce8..6b3ae83 100644
--- a/core/tests/Drupal/KernelTests/Core/File/FileTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/File/FileTestBase.php
@@ -69,6 +69,10 @@ protected function setUpFilesystem() {
     mkdir($this->siteDirectory . '/files/config/' . CONFIG_SYNC_DIRECTORY, 0775, TRUE);
 
     $this->setSetting('file_public_path', $public_file_directory);
+
+    $GLOBALS['config_directories'] = array(
+      CONFIG_SYNC_DIRECTORY => $this->siteDirectory . '/files/config/sync',
+    );
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/Condition/OptionalContextConditionTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/Condition/OptionalContextConditionTest.php
index e052071..96c8bac 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/Condition/OptionalContextConditionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/Condition/OptionalContextConditionTest.php
@@ -23,7 +23,7 @@ class OptionalContextConditionTest extends KernelTestBase {
   /**
    * Tests with both contexts mapped to the same user.
    */
-  protected function testContextMissing() {
+  public function testContextMissing() {
     /** @var \Drupal\Core\Condition\ConditionPluginBase $condition */
     $condition = \Drupal::service('plugin.manager.condition')
       ->createInstance('condition_test_optional_context')
@@ -37,7 +37,7 @@ protected function testContextMissing() {
   /**
    * Tests with both contexts mapped to the same user.
    */
-  protected function testContextNoValue() {
+  public function testContextNoValue() {
     /** @var \Drupal\Core\Condition\ConditionPluginBase $condition */
     $condition = \Drupal::service('plugin.manager.condition')
       ->createInstance('condition_test_optional_context')
@@ -53,7 +53,7 @@ protected function testContextNoValue() {
   /**
    * Tests with both contexts mapped to the same user.
    */
-  protected function testContextAvailable() {
+  public function testContextAvailable() {
     NodeType::create(['type' => 'example', 'name' => 'Example'])->save();
     /** @var \Drupal\Core\Condition\ConditionPluginBase $condition */
     $condition = \Drupal::service('plugin.manager.condition')
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/StableLibraryOverrideTest.php b/core/tests/Drupal/KernelTests/Core/Theme/StableLibraryOverrideTest.php
index af54de4..00e964d 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/StableLibraryOverrideTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/StableLibraryOverrideTest.php
@@ -49,6 +49,11 @@ class StableLibraryOverrideTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
+  public static $modules = ['system'];
+
+  /**
+   * {@inheritdoc}
+   */
   protected function setUp() {
     parent::setUp();
 
@@ -70,7 +75,7 @@ protected function setUp() {
     });
     $this->allModules = array_keys($all_modules);
     sort($this->allModules);
-    $this->enableModules($this->allModules);
+    $this->container->get('module_installer')->install($this->allModules);
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/KernelTestBase.php b/core/tests/Drupal/KernelTests/KernelTestBase.php
index 01504b0..4af7e3f 100644
--- a/core/tests/Drupal/KernelTests/KernelTestBase.php
+++ b/core/tests/Drupal/KernelTests/KernelTestBase.php
@@ -278,10 +278,6 @@ protected function bootEnvironment() {
 
     $this->setUpFilesystem();
 
-    $GLOBALS['config_directories'] = array(
-      CONFIG_SYNC_DIRECTORY => $this->siteDirectory . '/files/config/sync',
-    );
-
     foreach (Database::getAllConnectionInfo() as $key => $targets) {
       Database::removeConnection($key);
     }
@@ -305,9 +301,13 @@ protected function setUpFilesystem() {
     mkdir($this->siteDirectory . '/files', 0775);
     mkdir($this->siteDirectory . '/files/config/' . CONFIG_SYNC_DIRECTORY, 0775, TRUE);
 
-    $settings = Settings::getAll();
+    $settings = Settings::getInstance() ? Settings::getAll() : [];
     $settings['file_public_path'] = $this->siteDirectory . '/files';
     new Settings($settings);
+
+    $GLOBALS['config_directories'] = array(
+      CONFIG_SYNC_DIRECTORY => $this->siteDirectory . '/files/config/sync',
+    );
   }
 
   /**