diff --git a/lib/Drupal/config_translation/Tests/ConfigTranslationUITest.php b/lib/Drupal/config_translation/Tests/ConfigTranslationUITest.php
index 357cb33..7e15d75 100644
--- a/lib/Drupal/config_translation/Tests/ConfigTranslationUITest.php
+++ b/lib/Drupal/config_translation/Tests/ConfigTranslationUITest.php
@@ -66,6 +66,8 @@ class ConfigTranslationUITest extends WebTestBase {
   function testSiteInformationTranslationUI() {
     $site_name = 'Site name for testing configuration translation';
     $site_slogan = 'Site slogan for testing configuration translation';
+    $fr_site_name = 'Nom du site pour tester la configuration traduction';
+    $fr_site_slogan = 'Slogan du site pour tester la traduction de configuration';
     $translation_base_url = 'admin/config/system/site-information/translate';
 
     // Set site name and slogan for default language.
@@ -86,8 +88,8 @@ class ConfigTranslationUITest extends WebTestBase {
 
     // Update site name and slogan for French.
     $edit = array(
-      '0[name]' => 'FR ' . $site_name,
-      '0[slogan]' => 'FR ' . $site_slogan,
+      '0[name]' => $fr_site_name,
+      '0[slogan]' => $fr_site_slogan,
     );
     $this->drupalPost($translation_base_url . '/add/fr', $edit, t('Save translation'));
     $this->assertRaw(t('Updated French configuration translations successfully.'));
@@ -99,13 +101,18 @@ class ConfigTranslationUITest extends WebTestBase {
 
     // Check translation saved proper.
     $this->drupalGet($translation_base_url . '/edit/fr');
-    $this->assertFieldByName('0[name]', 'FR ' . $site_name);
-    $this->assertFieldByName('0[slogan]', 'FR ' . $site_slogan);
+    $this->assertFieldByName('0[name]', $fr_site_name);
+    $this->assertFieldByName('0[slogan]', $fr_site_slogan);
 
     // Check French translation of site name and slogan are in place.
     $this->drupalGet('fr');
-    $this->assertRaw('FR ' . $site_name);
-    $this->assertRaw('FR ' . $site_slogan);
+    $this->assertRaw($fr_site_name);
+    $this->assertRaw($fr_site_slogan);
+
+    // Visit French site to ensure base language string present as source.
+    $this->drupalGet($translation_base_url . '/edit/fr');
+    $this->assertText($site_name);
+    $this->assertText($site_slogan);
   }
 
   /**