diff -u b/core/lib/Drupal/Core/Config/ConfigCollectionInfoEvent.php b/core/lib/Drupal/Core/Config/ConfigCollectionInfoEvent.php
--- b/core/lib/Drupal/Core/Config/ConfigCollectionInfoEvent.php
+++ b/core/lib/Drupal/Core/Config/ConfigCollectionInfoEvent.php
@@ -10,7 +10,7 @@
 use Symfony\Component\EventDispatcher\Event;
 
 /**
- * Wraps a configuration event for event listeners.
+ * Gets information on all the possible configuration collections.
  */
 class ConfigCollectionInfoEvent extends Event {
 
@@ -22,7 +22,7 @@
   protected $collections = array();
 
   /**
-   * Adds names to the list of possible collections.
+   * Adds collections to the list of possible collections.
    *
    * @param array $collections
    *   Collection names to add.
@@ -30,7 +30,7 @@
    *   (optional) The configuration factory override service responsible for the
    *   collection.
    */
-  public function addCollectionNames(array $collections, ConfigFactoryOverrideInterface $override_service = NULL) {
+  public function addCollections(array $collections, ConfigFactoryOverrideInterface $override_service = NULL) {
     if (count($collections) > 0) {
       $collections_to_add = array_combine($collections, array_fill(0, count($collections), $override_service));
       $this->collections = array_merge($this->collections, $collections_to_add);
@@ -38,7 +38,7 @@
   }
 
   /**
-   * Adds a name to the list of possible collections.
+   * Adds a collection to the list of possible collections.
    *
    * @param string $collection
    *   Collection name to add.
@@ -46,8 +46,8 @@
    *   (optional) The configuration factory override service responsible for the
    *   collection.
    */
-  public function addCollectionName($collection, ConfigFactoryOverrideInterface $override_service = NULL) {
-    $this->addCollectionNames(array($collection), $override_service);
+  public function addCollection($collection, ConfigFactoryOverrideInterface $override_service = NULL) {
+    $this->addCollections(array($collection), $override_service);
   }
 
   /**
diff -u b/core/lib/Drupal/Core/Config/ConfigImporter.php b/core/lib/Drupal/Core/Config/ConfigImporter.php
--- b/core/lib/Drupal/Core/Config/ConfigImporter.php
+++ b/core/lib/Drupal/Core/Config/ConfigImporter.php
@@ -156,13 +156,6 @@
   protected $totalConfigurationToProcess = 0;
 
   /**
-   * The ConfigCollectionInfoEvent after dispatch.
-   *
-   * @var \Drupal\Core\Config\ConfigCollectionInfoEvent
-   */
-  protected $configCollectionInfo;
-
-  /**
    * Constructs a configuration import object.
    *
    * @param \Drupal\Core\Config\StorageComparerInterface $storage_comparer
@@ -903,7 +896,7 @@
    *   The name of the configuration to process.
    */
   protected function importConfig($collection, $op, $name) {
-    $overrider = $this->getConfigCollectionInfo()->getOverrideService($collection);
+    $overrider = $this->configManager->getConfigCollectionInfo()->getOverrideService($collection);
     if ($overrider) {
       $config = $overrider->getConfigObject($name, $collection);
     }
@@ -1058,26 +1051,2 @@
 
-  /**
-   * Gets available collection information using the event.
-   *
-   * @return \Drupal\Core\Config\ConfigCollectionInfoEvent
-   *   The event which collects information about all the available collections.
-   */
-  protected function getConfigCollectionInfo() {
-    if (!isset($this->configCollectionInfo)) {
-      $this->configCollectionInfo = new ConfigCollectionInfoEvent();
-      $this->eventDispatcher->dispatch(ConfigEvents::COLLECTION_NAMES, $this->configCollectionInfo);
-    }
-    return $this->configCollectionInfo;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function __sleep() {
-    // Unset the collection information since this can contain references to
-    // services.
-    $this->configCollectionInfo = NULL;
-    return parent::__sleep();
-  }
-
 }
diff -u b/core/lib/Drupal/Core/Config/ConfigInstaller.php b/core/lib/Drupal/Core/Config/ConfigInstaller.php
--- b/core/lib/Drupal/Core/Config/ConfigInstaller.php
+++ b/core/lib/Drupal/Core/Config/ConfigInstaller.php
@@ -96,10 +96,8 @@
       $this->typedConfig->clearCachedDefinitions();
     }
 
-    // Gather all the supported collection names.
-    $event = new ConfigCollectionInfoEvent();
-    $this->eventDispatcher->dispatch(ConfigEvents::COLLECTION_NAMES, $event);
-    $collections = $event->getCollectionNames();
+    // Gather information about all the supported collections.
+    $collection_info = $this->configManager->getConfigCollectionInfo();
 
     $old_state = $this->configFactory->getOverrideState();
     $this->configFactory->setOverrideState(FALSE);
@@ -110,10 +108,10 @@
     $enabled_extensions = array_keys((array) $extension_config->get('module'));
     $enabled_extensions += array_keys((array) $extension_config->get('theme'));
 
-    foreach ($collections as $collection) {
+    foreach ($collection_info->getCollectionNames(TRUE) as $collection) {
       $config_to_install = $this->listDefaultConfigCollection($collection, $type, $name, $enabled_extensions);
       if (!empty($config_to_install)) {
-        $this->createConfiguration($collection, $config_to_install, $event);
+        $this->createConfiguration($collection, $config_to_install, $collection_info);
       }
     }
     $this->configFactory->setOverrideState($old_state);
@@ -169,10 +167,10 @@
    *   The configuration collection.
    * @param array $config_to_install
    *   A list of configuration object names to create.
-   * @param \Drupal\Core\Config\ConfigCollectionInfoEvent $event
-   *   The event which holds information about configuration collections.
+   * @param \Drupal\Core\Config\ConfigCollectionInfoEvent $collection_info
+   *   The configuration collection information.
    */
-  protected function createConfiguration($collection, array $config_to_install, ConfigCollectionInfoEvent $event) {
+  protected function createConfiguration($collection, array $config_to_install, ConfigCollectionInfoEvent $collection_info) {
     // Order the configuration to install in the order of dependencies.
     $data = $this->getSourceStorage($collection)->readMultiple($config_to_install);
     $config_entity_support = $this->configManager->supportsConfigurationEntities($collection);
@@ -187,7 +185,7 @@
     $config_to_install = array_diff($config_to_install, $this->getActiveStorage($collection)->listAll());
 
     foreach ($config_to_install as $name) {
-      $overrider = $event->getOverrideService($collection);
+      $overrider = $collection_info->getOverrideService($collection);
       if ($overrider) {
         $new_config = $overrider->getConfigObject($name, $collection);
       }
@@ -246,13 +244,11 @@
       return in_array($provider, $enabled_extensions);
     });
     if (!empty($config_to_install)) {
-      // Gather information about all the collection names.
-      $event = new ConfigCollectionInfoEvent();
-      $this->eventDispatcher->dispatch(ConfigEvents::COLLECTION_NAMES, $event);
-
+      // Gather information about all the configuration collections.
+      $collection_info = $this->configManager->getConfigCollectionInfo();
       $old_state = $this->configFactory->getOverrideState();
       $this->configFactory->setOverrideState(FALSE);
-      $this->createConfiguration($collection, $config_to_install, $event);
+      $this->createConfiguration($collection, $config_to_install, $collection_info);
       $this->configFactory->setOverrideState($old_state);
       // Reset all the static caches and list caches.
       $this->configFactory->reset();
diff -u b/core/modules/config/tests/config_collection_install_test/lib/Drupal/config_collection_install_test/EventSubscriber.php b/core/modules/config/tests/config_collection_install_test/lib/Drupal/config_collection_install_test/EventSubscriber.php
--- b/core/modules/config/tests/config_collection_install_test/lib/Drupal/config_collection_install_test/EventSubscriber.php
+++ b/core/modules/config/tests/config_collection_install_test/lib/Drupal/config_collection_install_test/EventSubscriber.php
@@ -37,15 +37,15 @@
    * @param \Drupal\Core\Config\ConfigCollectionInfoEvent $event
    *   The configuration collection names event.
    */
-  public function addCollectionNames(ConfigCollectionInfoEvent $event) {
-    $event->addCollectionNames($this->state->get('config_collection_install_test.collection_names', array()));
+  public function addCollections(ConfigCollectionInfoEvent $event) {
+    $event->addCollections($this->state->get('config_collection_install_test.collection_names', array()));
   }
 
   /**
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::COLLECTION_NAMES][] = array('addCollectionNames');
+    $events[ConfigEvents::COLLECTION_INFO][] = array('addCollections');
     return $events;
   }
 
diff -u b/core/modules/language/lib/Drupal/language/Config/LanguageConfigFactoryOverride.php b/core/modules/language/lib/Drupal/language/Config/LanguageConfigFactoryOverride.php
--- b/core/modules/language/lib/Drupal/language/Config/LanguageConfigFactoryOverride.php
+++ b/core/modules/language/lib/Drupal/language/Config/LanguageConfigFactoryOverride.php
@@ -194,24 +194,24 @@
   }
 
   /**
-   * Reacts to the ConfigEvents::COLLECTION_NAMES event.
+   * Reacts to the ConfigEvents::COLLECTION_INFO event.
    *
    * @param \Drupal\Core\Config\ConfigCollectionInfoEvent $event
    *   The configuration collection names event.
    */
-  public function addCollectionNames(ConfigCollectionInfoEvent $event) {
+  public function addCollections(ConfigCollectionInfoEvent $event) {
     $collections = array();
     foreach (\Drupal::languageManager()->getLanguages() as $language) {
       $collections[] = $this->createConfigCollectionName($language->getId());
     }
-    $event->addCollectionNames($collections, $this);
+    $event->addCollections($collections, $this);
   }
 
   /**
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::COLLECTION_NAMES][] = array('addCollectionNames');
+    $events[ConfigEvents::COLLECTION_INFO][] = array('addCollections');
     return $events;
   }
 
diff -u b/core/modules/language/lib/Drupal/language/Tests/LanguageConfigOverrideImportTest.php b/core/modules/language/lib/Drupal/language/Tests/LanguageConfigOverrideImportTest.php
--- b/core/modules/language/lib/Drupal/language/Tests/LanguageConfigOverrideImportTest.php
+++ b/core/modules/language/lib/Drupal/language/Tests/LanguageConfigOverrideImportTest.php
@@ -72,7 +72,9 @@
    * Tests that configuration events are not fired during a sync of overrides.
    */
   public function testConfigOverrideImportEvents() {
+    // Enable the config_events_test module so we can record events occurring.
     \Drupal::moduleHandler()->install(array('config_events_test'));
+    $this->rebuildContainer();
 
     language_save(new Language(array(
       'name' => 'French',
only in patch2:
unchanged:
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -77,7 +77,7 @@ services:
     arguments: [discovery]
   config.manager:
     class: Drupal\Core\Config\ConfigManager
-    arguments: ['@entity.manager', '@config.factory', '@config.typed', '@string_translation', '@config.storage']
+    arguments: ['@entity.manager', '@config.factory', '@config.typed', '@string_translation', '@config.storage', '@event_dispatcher']
   config.factory:
     class: Drupal\Core\Config\ConfigFactory
     tags:
only in patch2:
unchanged:
--- a/core/lib/Drupal/Core/Config/ConfigEvents.php
+++ b/core/lib/Drupal/Core/Config/ConfigEvents.php
@@ -55,6 +55,6 @@
    *
    * @see \Drupal\Core\Config\ConfigInstaller::installDefaultConfig()
    */
-  const COLLECTION_NAMES = 'config.collection_names';
+  const COLLECTION_INFO = 'config.collection_info';
 
 }
only in patch2:
unchanged:
--- a/core/lib/Drupal/Core/Config/ConfigManager.php
+++ b/core/lib/Drupal/Core/Config/ConfigManager.php
@@ -12,6 +12,7 @@
 use Drupal\Core\Entity\EntityManagerInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\StringTranslation\TranslationManager;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
 /**
  * The ConfigManager provides helper functions for the configuration system.
@@ -54,6 +55,20 @@ class ConfigManager implements ConfigManagerInterface {
   protected $activeStorage;
 
   /**
+   * The event dispatcher.
+   *
+   * @var \Symfony\Component\EventDispatcher\EventDispatcherInterface
+   */
+  protected $eventDispatcher;
+
+  /**
+   * The configuration collection info.
+   *
+   * @var \Drupal\Core\Config\ConfigCollectionInfoEvent
+   */
+  protected $configCollectionInfo;
+
+  /**
    * Creates ConfigManager objects.
    *
    * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
@@ -64,13 +79,15 @@ class ConfigManager implements ConfigManagerInterface {
    *   The typed config manager.
    * @param \Drupal\Core\StringTranslation\TranslationManager $string_translation
    *   The string translation service.
+   * * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $event_dispatcher
    */
-  public function __construct(EntityManagerInterface $entity_manager, ConfigFactoryInterface $config_factory, TypedConfigManager $typed_config_manager, TranslationManager $string_translation, StorageInterface $active_storage) {
+  public function __construct(EntityManagerInterface $entity_manager, ConfigFactoryInterface $config_factory, TypedConfigManager $typed_config_manager, TranslationManager $string_translation, StorageInterface $active_storage, EventDispatcherInterface $event_dispatcher) {
     $this->entityManager = $entity_manager;
     $this->configFactory = $config_factory;
     $this->typedConfigManager = $typed_config_manager;
     $this->stringTranslation = $string_translation;
     $this->activeStorage = $active_storage;
+    $this->eventDispatcher = $event_dispatcher;
   }
 
   /**
@@ -246,4 +263,16 @@ public function findConfigEntityDependentsAsEntities($type, array $names) {
   public function supportsConfigurationEntities($collection) {
     return $collection == StorageInterface::DEFAULT_COLLECTION;
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConfigCollectionInfo() {
+    if (!isset($this->configCollectionInfo)) {
+      $this->configCollectionInfo = new ConfigCollectionInfoEvent();
+      $this->eventDispatcher->dispatch(ConfigEvents::COLLECTION_INFO, $this->configCollectionInfo);
+    }
+    return $this->configCollectionInfo;
+  }
+
 }
only in patch2:
unchanged:
--- a/core/lib/Drupal/Core/Config/ConfigManagerInterface.php
+++ b/core/lib/Drupal/Core/Config/ConfigManagerInterface.php
@@ -123,4 +123,12 @@ public function findConfigEntityDependentsAsEntities($type, array $names);
    */
   public function supportsConfigurationEntities($collection);
 
+  /**
+   * Gets available collection information using the event.
+   *
+   * @return \Drupal\Core\Config\ConfigCollectionInfoEvent
+   *   The event which collects information about all the available collections.
+   */
+  public function getConfigCollectionInfo();
+
 }