diff --git a/core/modules/comment/src/CommentTypeForm.php b/core/modules/comment/src/CommentTypeForm.php
index bdde416182..3ab6a68924 100644
--- a/core/modules/comment/src/CommentTypeForm.php
+++ b/core/modules/comment/src/CommentTypeForm.php
@@ -74,7 +74,7 @@ public function form(array $form, FormStateInterface $form_state) {
 
     $comment_type = $this->entity;
 
-    if ($this->operation == 'edit') {
+    if ($this->operation === 'edit') {
       $form['#title'] = $this->t('Edit %label comment type', ['%label' => $comment_type->label()]);
     }
 
diff --git a/core/modules/comment/src/Controller/CommentTypeController.php b/core/modules/comment/src/Controller/CommentTypeController.php
index 0dc5c5d5a4..d9baeca9b6 100644
--- a/core/modules/comment/src/Controller/CommentTypeController.php
+++ b/core/modules/comment/src/Controller/CommentTypeController.php
@@ -4,6 +4,7 @@
 
 use Drupal\comment\CommentTypeInterface;
 use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\StringTranslation\TranslatableMarkup;
 
 /**
  * Returns responses for comment type routes.
@@ -16,10 +17,10 @@ class CommentTypeController extends ControllerBase {
    * @param \Drupal\comment\CommentTypeInterface $comment_type
    *   The comment type entity.
    *
-   * @return string
+   * @return string|\Drupal\Core\StringTranslation\TranslatableMarkup|null
    *   The comment type title.
    */
-  public function commentTypeTitle(CommentTypeInterface $comment_type) {
+  public function commentTypeTitle(CommentTypeInterface $comment_type): string|TranslatableMarkup|null {
     return $comment_type->label();
   }