diff --git a/core/modules/system/tests/modules/deprecation_test/deprecation_test.module b/core/modules/system/tests/modules/deprecation_test/deprecation_test.module
index 920fd816297..95aaa69b80a 100644
--- a/core/modules/system/tests/modules/deprecation_test/deprecation_test.module
+++ b/core/modules/system/tests/modules/deprecation_test/deprecation_test.module
@@ -13,6 +13,8 @@
  *
  * @deprecated in drupal:8.4.0 and is removed from drupal:9.0.0. This is
  *   the deprecation message for deprecated_test_function().
+ *
+ * @see https://www.drupal.org/project/drupal/issues/2870194
  */
 function deprecation_test_function() {
   @trigger_error('This is the deprecation message for deprecation_test_function().', E_USER_DEPRECATED);
diff --git a/core/phpcs.xml.dist b/core/phpcs.xml.dist
index d56b865f1a0..8888fd22022 100644
--- a/core/phpcs.xml.dist
+++ b/core/phpcs.xml.dist
@@ -42,6 +42,7 @@
     <exclude name="Drupal.Commenting.ClassComment.Missing"/>
   </rule>
   <rule ref="Drupal.Commenting.DataTypeNamespace"/>
+  <rule ref="Drupal.Commenting.Deprecated"/>
   <rule ref="Drupal.Commenting.DocComment">
     <!-- Sniff for these errors: SpacingAfterTagGroup, WrongEnd, SpacingBetween,
       ContentAfterOpen, SpacingBeforeShort, TagValueIndent, ShortStartSpace,