diff --git a/core/modules/help_topics/tests/src/Unit/HelpTopicTwigTest.php b/core/modules/help_topics/tests/src/Unit/HelpTopicTwigTest.php
index e1990a052308e12891e9228d40ccc5deb8185b81..70e085236fe68b5406135fe957cdbd3b240d8e92 100644
--- a/core/modules/help_topics/tests/src/Unit/HelpTopicTwigTest.php
+++ b/core/modules/help_topics/tests/src/Unit/HelpTopicTwigTest.php
@@ -30,7 +30,7 @@ class HelpTopicTwigTest extends UnitTestCase {
    *
    * @var array
    */
-  protected const PLUGIN_INFORMATION = [
+  const PLUGIN_INFORMATION = [
     'id' => 'test.topic',
     'provider' => 'test',
     'label' => 'This is the topic label',