diff --git a/core/lib/Drupal/Core/Theme/AjaxBasePageNegotiator.php b/core/lib/Drupal/Core/Theme/AjaxBasePageNegotiator.php
index fcbfca4..4066b16 100644
--- a/core/lib/Drupal/Core/Theme/AjaxBasePageNegotiator.php
+++ b/core/lib/Drupal/Core/Theme/AjaxBasePageNegotiator.php
@@ -77,10 +77,10 @@ public function determineActiveTheme(Request $request) {
       $token = $ajax_page_state['theme_token'];
 
       // Prevent a request forgery from giving a person access to a theme they
-      // shouldn't be otherwise allowed to see. However, since everyone is allowed
-      // to see the default theme, token validation isn't required for that, and
-      // bypassing it allows most use-cases to work even when accessed from the
-      // page cache.
+      // shouldn't be otherwise allowed to see. However, since everyone is
+      // allowed to see the default theme, token validation isn't required for
+      // that, and bypassing it allows most use-cases to work even when accessed
+      // from the page cache.
       if ($theme === $this->configFactory->get('system.theme')->get('default') || $this->csrfGenerator->validate($token, $theme)) {
         return $theme;
       }
diff --git a/core/lib/Drupal/Core/Theme/ThemeNegotiator.php b/core/lib/Drupal/Core/Theme/ThemeNegotiator.php
index 6d8e1c9..51f3e67 100644
--- a/core/lib/Drupal/Core/Theme/ThemeNegotiator.php
+++ b/core/lib/Drupal/Core/Theme/ThemeNegotiator.php
@@ -76,7 +76,7 @@ public function setRequest(Request $request) {
    * @param \Drupal\Core\Theme\ThemeNegotiatorInterface $negotiator
    *   The theme negotiator to add.
    * @param int $priority
-   *   Priority of the breadcrumb builder.
+   *   Priority of the theme negotiator.
    */
   public function addNegotiator(ThemeNegotiatorInterface $negotiator, $priority) {
     $this->negotiators[$priority][] = $negotiator;
@@ -88,7 +88,7 @@ public function addNegotiator(ThemeNegotiatorInterface $negotiator, $priority) {
    * Returns the sorted array of theme negotiators.
    *
    * @return array|\Drupal\Core\Theme\ThemeNegotiatorInterface[]
-   *   An array of breadcrumb builder objects.
+   *   An array of theme negotiator objects.
    */
   protected function getSortedNegotiators() {
     if (!isset($this->sortedNegotiators)) {
diff --git a/core/tests/Drupal/Tests/Core/Theme/ThemeNegotiatorTest.php b/core/tests/Drupal/Tests/Core/Theme/ThemeNegotiatorTest.php
index 620022d..e8bb2fe 100644
--- a/core/tests/Drupal/Tests/Core/Theme/ThemeNegotiatorTest.php
+++ b/core/tests/Drupal/Tests/Core/Theme/ThemeNegotiatorTest.php
@@ -14,6 +14,8 @@
 /**
  * Tests the theme negotiator.
  *
+ * @group Drupal
+ *
  * @see \Drupal\Core\Theme\ThemeNegotiator
  */
 class ThemeNegotiatorTest extends UnitTestCase {