diff --git a/core/modules/system/lib/Drupal/system/Tests/System/ThemeTest.php b/core/modules/system/lib/Drupal/system/Tests/System/ThemeTest.php
index 9a13acb..4d3d181 100644
--- a/core/modules/system/lib/Drupal/system/Tests/System/ThemeTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/System/ThemeTest.php
@@ -235,7 +235,7 @@ function testSwitchDefaultTheme() {
     // Enable Bartik and set it as the default theme.
     theme_enable(array('bartik'));
     $this->drupalGet('admin/appearance');
-    $this->clickLink(t('Set default'));
+    $this->clickLink(t('Set as default'));
     $this->assertEqual(\Drupal::config('system.theme')->get('default'), 'bartik');
 
     drupal_flush_all_caches();
@@ -245,7 +245,7 @@ function testSwitchDefaultTheme() {
     $this->assertText('Bartik(' . t('active tab') . ')', 'Default local task on blocks admin page is the default theme.');
     // Switch back to Stark and test again to test that the menu cache is cleared.
     $this->drupalGet('admin/appearance');
-    $this->clickLink(t('Set default'), 0);
+    $this->clickLink(t('Set as default'), 0);
     $this->drupalGet('admin/structure/block');
     $this->assertText('Stark(' . t('active tab') . ')', 'Default local task on blocks admin page has changed.');
   }
diff --git a/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
index ac0c032..a4e26bc 100644
--- a/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -87,7 +87,7 @@ function system_themes_page() {
             );
           }
           $theme->operations[] = array(
-            'title' => t('Set default'),
+            'title' => t('Set as default'),
             'href' => 'admin/appearance/default',
             'query' => $query,
             'attributes' => array('title' => t('Set !theme as default theme', array('!theme' => $theme->info['name']))),
@@ -103,7 +103,7 @@ function system_themes_page() {
           'attributes' => array('title' => t('Enable !theme theme', array('!theme' => $theme->info['name']))),
         );
         $theme->operations[] = array(
-          'title' => t('Enable and set default'),
+          'title' => t('Enable and set as default'),
           'href' => 'admin/appearance/default',
           'query' => $query,
           'attributes' => array('title' => t('Enable !theme as default theme', array('!theme' => $theme->info['name']))),