diff --git a/mod/forum/tests/vaults_discussion_list_test.php b/mod/forum/tests/vaults_discussion_list_test.php
index dc9a14f60d0..ccc39a1dc19 100644
--- a/mod/forum/tests/vaults_discussion_list_test.php
+++ b/mod/forum/tests/vaults_discussion_list_test.php
@@ -78,6 +78,7 @@ class mod_forum_vaults_discussion_list_testcase extends advanced_testcase {
         $datagenerator = $this->getDataGenerator();
         $vault = $this->vault;
         $user = $datagenerator->create_user();
+        self::setUser($user);
         $course = $datagenerator->create_course();
         $forum = $datagenerator->create_module('forum', ['course' => $course->id]);
 
@@ -127,6 +128,7 @@ class mod_forum_vaults_discussion_list_testcase extends advanced_testcase {
         $datagenerator = $this->getDataGenerator();
         $vault = $this->vault;
         $user = $datagenerator->create_user();
+        self::setUser($user);
         $course = $datagenerator->create_course();
         $forum = $datagenerator->create_module('forum', ['course' => $course->id]);
 
@@ -231,6 +233,7 @@ class mod_forum_vaults_discussion_list_testcase extends advanced_testcase {
         $datagenerator = $this->getDataGenerator();
         $vault = $this->vault;
         $user = $datagenerator->create_user();
+        self::setUser($user);
         $course = $datagenerator->create_course();
         $forum = $datagenerator->create_module('forum', ['course' => $course->id]);