diff --git a/core/modules/locale/src/LocaleConfigSubscriber.php b/core/modules/locale/src/LocaleConfigSubscriber.php
index d06cb34dec..f2eef74fde 100644
--- a/core/modules/locale/src/LocaleConfigSubscriber.php
+++ b/core/modules/locale/src/LocaleConfigSubscriber.php
@@ -76,10 +76,16 @@ public static function getSubscribedEvents() {
    *   The configuration event.
    */
   public function onConfigSave(ConfigCrudEvent $event) {
+    // Do not feed back configuration translation changes during installation
+    // because configuration translation has not taken place yet. The one
+    // exception is the system.site configuration object because the user
+    // provides a custom translation of the site name during installation.
+    $config = $event->getConfig();
+    $is_installing = drupal_installation_attempted() && $config->getName() !== 'system.site';
+
     // Only attempt to feed back configuration translation changes to locale if
     // the update itself was not initiated by locale data changes.
-    if (!drupal_installation_attempted() && !$this->localeConfigManager->isUpdatingTranslationsFromLocale()) {
-      $config = $event->getConfig();
+    if (!$is_installing && !$this->localeConfigManager->isUpdatingTranslationsFromLocale()) {
       $langcode = $config->get('langcode') ?: 'en';
       $this->updateLocaleStorage($config, $langcode);
     }
diff --git a/core/modules/system/src/Tests/Installer/DistributionProfileTest.php b/core/modules/system/src/Tests/Installer/DistributionProfileTest.php
index e52b0469bb..3d2c4c44ab 100644
--- a/core/modules/system/src/Tests/Installer/DistributionProfileTest.php
+++ b/core/modules/system/src/Tests/Installer/DistributionProfileTest.php
@@ -46,6 +46,8 @@ protected function setUp() {
   protected function setUpLanguage() {
     // Verify that the distribution name appears.
     $this->assertRaw($this->info['distribution']['name']);
+    // Verify that the distribution name is used in the site title.
+    $this->assertTitle('Choose language | ' . $this->info['distribution']['name']);
     // Verify that the requested theme is used.
     $this->assertRaw($this->info['distribution']['install']['theme']);
     // Verify that the "Choose profile" step does not appear.
diff --git a/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php b/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php
index a608cada77..dcde753d76 100644
--- a/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php
@@ -51,13 +51,29 @@ protected function getPo($langcode) {
 
 msgid "Language"
 msgstr "Language $langcode"
+
+#: Testing site name configuration during the installer.
+msgid "Drupal"
+msgstr "Drupal"
 ENDPO;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  protected function installParameters() {
+    $params = parent::installParameters();
+    $params['forms']['install_configure_form']['site_name'] = 'SITE_NAME_' . $this->langcode;
+    return $params;
+  }
+
   /**
    * Tests that translations ended up at the expected places.
    */
   public function testTranslationsLoaded() {
+    // Ensure the title is correct.
+    $this->assertEqual('SITE_NAME_' . $this->langcode, \Drupal::config('system.site')->get('name'));
+
     // Verify German and Spanish were configured.
     $this->drupalGet('admin/config/regional/language');
     $this->assertText('German');