diff --git a/core/modules/locale/lib/Drupal/locale/Tests/LocaleImportFunctionalTest.php b/core/modules/locale/lib/Drupal/locale/Tests/LocaleImportFunctionalTest.php
index 589c555..e7c9396 100644
--- a/core/modules/locale/lib/Drupal/locale/Tests/LocaleImportFunctionalTest.php
+++ b/core/modules/locale/lib/Drupal/locale/Tests/LocaleImportFunctionalTest.php
@@ -238,6 +238,46 @@ class LocaleImportFunctionalTest extends WebTestBase {
   }
 
   /**
+   * Test automatic import of a module's translation files without English
+   * being enabled.
+   */
+  function testAutomaticModuleTranslationImportGermanOnly() {
+    // Code for the language - manually set to match the test translation file.
+    $langcode = 'de';
+    // The English name for the language.
+    $name = $this->randomName(16);
+
+    // Create a custom language.
+    $edit = array(
+      'predefined_langcode' => 'de',
+      'langcode' => '',
+      'name' => '',
+      'direction' => '0',
+    );
+    $this->drupalPost('admin/config/regional/language/add', $edit, t('Add custom language'));
+    $this->assertText(t('German.'), t('German is added.'));
+
+    // Make German the default.
+    $edit = array(
+      'site_default' => 'de',
+    );
+    $this->drupalPost('admin/config/regional/language', $edit, t('Save configuration'));
+
+    // Delete English.
+    $edit = array(
+      'site_default' => 'de',
+    );
+    $this->drupalPost('admin/config/regional/language/delete/en', $edit, t('Delete'));
+    $this->assertNoText(t('English'), 'English is deleted.');
+
+    // Enable books module.
+    $edit['modules[Core][books][enable]'] = TRUE;
+    $this->drupalPost('admin/modules', $edit, t('Save configuration'));
+    $this->assertText(t('The translation was successfully imported.'), t('The translation was successfully imported.'));
+
+  }
+
+  /**
    * Test msgctxt context support.
    */
   function testLanguageContext() {