diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 4cc6424..8451ed1 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1322,6 +1322,12 @@ function template_preprocess_html(&$variables) {
     }
   }
 
+  // Early in the installer the site name is unknown. In this case we need to
+  // fallback to the distribution's name.
+  if (empty($head_title['name']) && drupal_installation_attempted() && function_exists('drupal_install_profile_distribution_name')) {
+    $head_title['name'] = drupal_install_profile_distribution_name();
+  }
+
   $variables['head_title'] = $head_title;
   // @deprecated in Drupal 8.0.0, will be removed before Drupal 9.0.0.
   $variables['head_title_array'] = $head_title;
diff --git a/core/modules/system/config/install/system.site.yml b/core/modules/system/config/install/system.site.yml
index b5a932b..d1ab8de 100644
--- a/core/modules/system/config/install/system.site.yml
+++ b/core/modules/system/config/install/system.site.yml
@@ -1,5 +1,5 @@
 uuid: ''
-name: 'Drupal'
+name: ''
 mail: ''
 slogan: ''
 page:
diff --git a/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php b/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php
index a608cad..dcde753 100644
--- a/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php
@@ -51,13 +51,29 @@ protected function getPo($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');