diff --git a/core/modules/tour/tests/src/Functional/TourTestBase.php b/core/modules/tour/tests/src/Functional/TourTestBase.php
index 37ede37..e21f0a8 100644
--- a/core/modules/tour/tests/src/Functional/TourTestBase.php
+++ b/core/modules/tour/tests/src/Functional/TourTestBase.php
@@ -29,7 +29,7 @@
    * $this->assertTourTips($tips);
    * @endcode
    */
-  public function assertTourTips($tips = []) {
+  protected function assertTourTips($tips = []) {
     // Get the rendered tips and their data-id and data-class attributes.
     if (empty($tips)) {
       // Tips are rendered as <li> elements inside <ol id="tour">.