diff --git a/core/themes/seven/seven.theme b/core/themes/seven/seven.theme
index 982a460..309951f 100644
--- a/core/themes/seven/seven.theme
+++ b/core/themes/seven/seven.theme
@@ -48,7 +48,7 @@ function seven_menu_local_tasks(&$variables) {
   if (!empty($variables['primary'])) {
     drupal_add_library('system', 'jquery.nav-tabs', FALSE);
     drupal_add_js(drupal_get_path('theme', 'seven') . '/js/nav-tabs.js');
-    $variables['primary']['#prefix'] = '<h2 class="element-invisible">' . t('Primary tabs') . '</h2>';
+    $variables['primary']['#prefix'] = '<h2 class="visually-hidden">' . t('Primary tabs') . '</h2>';
     $variables['primary']['#prefix'] .= '<nav role="navigation" data-drupal-nav-tabs="collapsible: true;">';
     $variables['primary']['#prefix'] .= '<button class="reset-appearance tabs__tab tabs__trigger js-nav-tabs__trigger">&bull;&bull;&bull;</button>';
     $variables['primary']['#prefix'] .= '<ul class="tabs primary js-nav-tabs__target clearfix">';
@@ -59,7 +59,7 @@ function seven_menu_local_tasks(&$variables) {
   if (!empty($variables['secondary'])) {
     drupal_add_library('system', 'jquery.nav-tabs', FALSE);
     drupal_add_js(drupal_get_path('theme', 'seven') . '/js/nav-tabs.js');
-    $variables['secondary']['#prefix'] = '<h2 class="element-invisible">' . t('Secondary tabs') . '</h2>';
+    $variables['secondary']['#prefix'] = '<h2 class="visually-hidden">' . t('Secondary tabs') . '</h2>';
     $variables['secondary']['#prefix'] .= '<nav role="navigation" data-drupal-nav-tabs>';
     $variables['secondary']['#prefix'] .= '<ul class="tabs secondary clearfix">';
     $variables['secondary']['#suffix'] = '</ul>';
@@ -85,7 +85,7 @@ function seven_menu_local_task($variables) {
 
   if (!empty($variables['element']['#active'])) {
     // Add text to indicate active tab for non-visual users.
-    $active = '<span class="element-invisible">' . t('(active tab)') . '</span>';
+    $active = '<span class="visually-hidden">' . t('(active tab)') . '</span>';
 
     // If the link does not contain HTML already, check_plain() it now.
     // After we set 'html'=TRUE the link will not be sanitized by l().
diff --git a/core/themes/seven/style.css b/core/themes/seven/style.css
index 371c9db..0c3cbcd 100644
--- a/core/themes/seven/style.css
+++ b/core/themes/seven/style.css
@@ -280,8 +280,8 @@ li.tabs__tab {
 li.tabs__tab a {
   padding: 9px 2em 7px 1em;
 }
-.tab a:hover,
-.tab a:focus {
+.tabs a:hover,
+.tabs a:focus {
   text-decoration: none;
 }
 .tabs.primary {