diff --git a/diff.install b/diff.install
index d29d97d..556fc82 100644
--- a/diff.install
+++ b/diff.install
@@ -133,3 +133,12 @@ function diff_update_8007() {
   $config->set('general_settings.visual_inline_theme', 'standard');
   $config->save();
 }
+
+/**
+ * Update settings, renamed 'standard' to 'default'.
+ */
+function diff_update_8008() {
+  $config = \Drupal::configFactory()->getEditable('diff.settings');
+  $config->set('general_settings.visual_inline_theme', 'default');
+  $config->save();
+}
diff --git a/src/Form/GeneralSettingsForm.php b/src/Form/GeneralSettingsForm.php
index 9227dda..0aadbd1 100644
--- a/src/Form/GeneralSettingsForm.php
+++ b/src/Form/GeneralSettingsForm.php
@@ -175,10 +175,10 @@ class GeneralSettingsForm extends ConfigFormBase {
         '#type' => 'select',
         '#title' => $this->t('Theme'),
         '#options' => [
-          'standard' => $this->t('Standard'),
+          'default' => $this->t('Default'),
           'admin' => $this->t('Admin'),
         ],
-        '#description' => $this->t('Use Standard to display the comparison as %default theme, or Admin as %admin theme.', [
+        '#description' => $this->t('Use Default to display the comparison as %default theme, or Admin as %admin theme.', [
           '%default' => $default_theme_name,
           '%admin' => $admin_theme_name,
         ]),
diff --git a/src/VisualDiffThemeNegotiator.php b/src/VisualDiffThemeNegotiator.php
index 54216c8..7fa4534 100644
--- a/src/VisualDiffThemeNegotiator.php
+++ b/src/VisualDiffThemeNegotiator.php
@@ -18,7 +18,7 @@ class VisualDiffThemeNegotiator extends AdminNegotiator {
   public function applies(RouteMatchInterface $routeMatch) {
     if ($routeMatch->getParameter('filter') === 'visual_inline') {
       if ($this->isDiffRoute($routeMatch)) {
-        if ($this->configFactory->get('diff.settings')->get('general_settings.visual_inline_theme') === 'standard') {
+        if ($this->configFactory->get('diff.settings')->get('general_settings.visual_inline_theme') === 'default') {
           return TRUE;
         }
       }
diff --git a/tests/src/Unit/VisualDiffThemeNegotiatorTest.php b/tests/src/Unit/VisualDiffThemeNegotiatorTest.php
index 600768d..87d4da0 100644
--- a/tests/src/Unit/VisualDiffThemeNegotiatorTest.php
+++ b/tests/src/Unit/VisualDiffThemeNegotiatorTest.php
@@ -85,7 +85,7 @@ class VisualDiffThemeNegotiatorTest extends UnitTestCase {
     $diff_config = $this->prophesize(ImmutableConfig::class);
     $this->configFactory->get('diff.settings')
       ->willReturn($diff_config->reveal());
-    $diff_config->get('general_settings.visual_inline_theme')->willReturn('standard');
+    $diff_config->get('general_settings.visual_inline_theme')->willReturn('default');
     \Drupal::setContainer($container->reveal());
 
     // Check if applies function returns true.