diff --git a/core/themes/seven/seven.theme b/core/themes/seven/seven.theme
index 3e79d0f..5d641e6 100644
--- a/core/themes/seven/seven.theme
+++ b/core/themes/seven/seven.theme
@@ -6,6 +6,7 @@
  */
 
 use Drupal\Core\Template\RenderWrapper;
+use Drupal\Component\Utility\String;
 
 /**
  * Implements hook_library_info().
@@ -125,7 +126,7 @@ function seven_menu_local_task($variables) {
     $a_tag = \Drupal::l($link_text, $link['route_name'], $link['route_parameters'], $link['localized_options']);
   }
 
-  return '<li' . (!empty($variables['element']['#active']) ? ' class="active tabs__tab"' : 'tabs__tab') . '>' . $a_tag . '</li>';
+  return '<li' . (!empty($variables['element']['#active']) ? ' class="tabs__tab active"' : ' class="tabs__tab"') . '>' . $a_tag . '</li>';
 }
 
 /**