diff --git a/core/modules/tour/src/Plugin/HelpSection/TourHelpSection.php b/core/modules/tour/src/Plugin/HelpSection/TourHelpSection.php
index 0058802..77a694d 100644
--- a/core/modules/tour/src/Plugin/HelpSection/TourHelpSection.php
+++ b/core/modules/tour/src/Plugin/HelpSection/TourHelpSection.php
@@ -69,19 +69,14 @@ public static function create(ContainerInterface $container, array $configuratio
   /**
    * {@inheritdoc}
    */
-  public function getCacheTags() {
-    // The list of topics depends on the list cache tag for the tour entity
-    // type.
-    return $this->entityTypeManager->getDefinition('tour')->getListCacheTags();
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getCacheContexts() {
-    // The links are checked for user access, so we need the user
-    // permissions context.
-    return ['user.permissions'];
+  public function getCacheMaxAge() {
+    // The calculation of which URL (if any) gets put on which tour depends
+    // on a route access check. This can have a lot of inputs, including user
+    // permissions and other factors. Unfortunately, we don't have a way to
+    // get cachability metadata for each of these factors, so the only way
+    // to ensure that inapplicable information is not used is to forbid
+    // caching completely.
+    return 0;
   }
 
   /**