diff -u b/core/modules/locale/lib/Drupal/locale/LocaleProjectStorage.php b/core/modules/locale/lib/Drupal/locale/LocaleProjectStorage.php
--- b/core/modules/locale/lib/Drupal/locale/LocaleProjectStorage.php
+++ b/core/modules/locale/lib/Drupal/locale/LocaleProjectStorage.php
@@ -2,15 +2,17 @@
 
 /**
  * @file
- * Contains Drupal\locale\ProjectStorage.
+ * Contains Drupal\locale\LocaleProjectStorage.
  */
 
-namespace Drupal\Core\KeyValueStore;
+namespace Drupal\locale;
+
+use Drupal\Core\KeyValueStore\KeyValueFactoryInterface;
 
 /**
  * Provides the locale project storage system using a key value store.
  */
-class LocaleProjectStorage {
+class LocaleProjectStorage implements LocaleProjectStorageInterface {
 
   /**
    * The key value store to use.
@@ -121,10 +123,17 @@
     $this->cache = array();
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public function deleteAll() {
+    $this->resetCache();
     $this->keyValueStore->deleteAll();
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public function disableAll() {
     $projects = $this->keyValueStore->getAll();
     array_walk($projects, function($project){
@@ -135,6 +144,15 @@
 
-  public function count() {
-    return count($this->keyValueStore->getAll());
+  /**
+   * {@inheritdoc}
+   */
+  public function countProjects() {
+    return !empty($this->cache) ? count($this->cache) : count($this->keyValueStore->getAll());
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getAll() {
+    return !empty($this->cache) ? $this->cache : $this->keyValueStore->getAll();
+  }
 }
diff -u b/core/modules/locale/locale.compare.inc b/core/modules/locale/locale.compare.inc
--- b/core/modules/locale/locale.compare.inc
+++ b/core/modules/locale/locale.compare.inc
@@ -85,6 +85,7 @@
 
     // For every project store information.
     $data += array(
+      'name' => $name,
       'version' => isset($data['info']['version']) ? $data['info']['version'] : '',
       'core' => isset($data['info']['core']) ? $data['info']['core'] : \Drupal::CORE_COMPATIBILITY,
       // A project can provide the path and filename pattern to download the
@@ -96,7 +97,6 @@
     $projects[$name] = $project;
 
     // Create or update the project record.
-    $data['name'] = $name;
     \Drupal::service('locale.project')->set($project->name, $data);
 
     // Invalidate the cache of translatable projects.
diff -u b/core/modules/locale/locale.translation.inc b/core/modules/locale/locale.translation.inc
--- b/core/modules/locale/locale.translation.inc
+++ b/core/modules/locale/locale.translation.inc
@@ -54,8 +54,7 @@
 
   if (empty($projects)) {
     // Get project data from the database.
-    $row_count = db_query_range('SELECT 1 FROM {locale_project}', 0, 1)->fetchField();
-
+    $row_count = \Drupal::service('locale.project')->countProjects();
     // http://drupal.org/node/1777106 is a follow-up issue to make the check for
     // possible out-of-date project information more robust.
     if ($row_count == 0 && \Drupal::moduleHandler()->moduleExists('update')) {
only in patch2:
unchanged:
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -1906,16 +1906,15 @@ function _install_prepare_import($langcode) {
     // we check if at least the major version number is available.
     if ($info['major']) {
       $core = $info['major'] . '.x';
-      db_insert('locale_project')
-        ->fields(array(
-          'name' => 'drupal',
-          'project_type' => 'module',
-          'core' => $core,
-          'version' => $version,
-          'server_pattern' => $install_state['server_pattern'],
-          'status' => 1,
-        ))
-        ->execute();
+      $data = array(
+        'name' => 'drupal',
+        'project_type' => 'module',
+        'core' => $core,
+        'version' => $version,
+        'server_pattern' => $install_state['server_pattern'],
+        'status' => 1,
+      );
+      \Drupal::service('locale.project')->set($data['name'], $data);
       module_load_include('compare.inc', 'locale');
       locale_translation_check_projects_local(array('drupal'), array($install_state['parameters']['langcode']));
     }
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/locale/lib/Drupal/locale/LocalProjectStorageInterface.php
@@ -0,0 +1,106 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\locale\LocalProjectStorageInterface.
+ */
+
+namespace Drupal\locale;
+
+/**
+ * Defines the locale project storage interface.
+ */
+interface LocaleProjectStorageInterface {
+
+  /**
+   * Returns the stored value for a given key.
+   *
+   * @param string $key
+   *   The key of the data to retrieve.
+   * @param mixed $default
+   *   The default value to use if the key is not found.
+   *
+   * @return mixed
+   *   The stored value, or the default value if no value exists.
+   */
+  public function get($key, $default = NULL);
+
+  /**
+   * Returns a list project records.
+   *
+   * @param array $keys
+   *   A list of keys to retrieve.
+   *
+   * @return array
+   *   An associative array of items successfully returned, indexed by key.
+   */
+  public function getMultiple(array $keys);
+
+  /**
+   * Creates or updates the project record.
+   *
+   * @param string $key
+   *   The key of the data to store.
+   * @param mixed $value
+   *   The data to store.
+   */
+  public function set($key, $value);
+
+  /**
+   * Creates or updates multiple project records.
+   *
+   * @param array $data
+   *   An associative array of key/value pairs.
+   */
+  public function setMultiple(array $data);
+
+  /**
+   * Deletes project records for a given key.
+   *
+   * @param string $key
+   *   The key of the data to delete.
+   */
+  public function delete($key);
+
+  /**
+   * Deletes multiple project records.
+   *
+   * @param array $keys
+   *   A list of item names to delete.
+   */
+  public function deleteMultiple(array $keys);
+
+  /**
+   * Returns all the project records.
+   *
+   * @return array
+   *   An associative array of items successfully returned, indexed by key.
+   */
+  public function getAll();
+
+  /**
+   * Deletes all projects records.
+   *
+   * @return array
+   *   An associative array of items successfully returned, indexed by key.
+   */
+  public function deleteAll();
+
+  /**
+   * Mark all projects as disabled.
+   */
+  public function disableAll();
+
+  /**
+   * Resets the project storage cache.
+   */
+  public function resetCache();
+
+  /**
+   * Returns the count of project records.
+   *
+   * @return int
+   *   The number of saved items.
+   */
+  public function countProjects();
+}