diff --git a/components/ILIAS/Test/classes/class.ilObjTestGUI.php b/components/ILIAS/Test/classes/class.ilObjTestGUI.php
index f61b911503e8..23272beb809a 100755
--- a/components/ILIAS/Test/classes/class.ilObjTestGUI.php
+++ b/components/ILIAS/Test/classes/class.ilObjTestGUI.php
@@ -326,7 +326,8 @@ public function executeCommand(): void
                     $this->ctrl,
                     $this->tabs_gui,
                     $this->toolbar,
-                    $this->test_question_set_config_factory->getQuestionSetConfig()
+                    $this->test_question_set_config_factory->getQuestionSetConfig(),
+                    $this->testrequest
                 );
 
                 $gui->setTestAccess($this->getTestAccess());
diff --git a/components/ILIAS/Test/classes/class.ilTestDashboardGUI.php b/components/ILIAS/Test/classes/class.ilTestDashboardGUI.php
index e81300bef858..d6faa8bd18c6 100755
--- a/components/ILIAS/Test/classes/class.ilTestDashboardGUI.php
+++ b/components/ILIAS/Test/classes/class.ilTestDashboardGUI.php
@@ -21,6 +21,8 @@
 use ILIAS\UI\Factory as UIFactory;
 use ILiAS\UI\Renderer as UIRenderer;
 
+use ILIAS\Test\InternalRequestService;
+
 /**
  * Class ilTestDashboardGUI
  *
@@ -50,7 +52,8 @@ public function __construct(
         protected ilCtrl $ctrl,
         protected ilTabsGUI $tabs,
         protected ilToolbarGUI $toolbar,
-        protected ilTestQuestionSetConfig $question_set_config
+        protected ilTestQuestionSetConfig $question_set_config,
+        protected InternalRequestService $testrequest
     ) {
     }
 
@@ -128,7 +131,8 @@ public function executeCommand(): void
                     $this->ctrl,
                     $this->db,
                     $this->tabs,
-                    $this->toolbar
+                    $this->toolbar,
+                    $this->testrequest
                 );
                 $gui->setTestAccess($this->getTestAccess());
                 $gui->setObjectiveParent($this->getObjectiveParent());
diff --git a/components/ILIAS/Test/classes/class.ilTestParticipantsGUI.php b/components/ILIAS/Test/classes/class.ilTestParticipantsGUI.php
index eaea2da0201a..eff53c4cb092 100755
--- a/components/ILIAS/Test/classes/class.ilTestParticipantsGUI.php
+++ b/components/ILIAS/Test/classes/class.ilTestParticipantsGUI.php
@@ -21,6 +21,8 @@
 use ILIAS\UI\Factory as UIFactory;
 use ILiAS\UI\Renderer as UIRenderer;
 
+use ILIAS\Test\InternalRequestService;
+
 /**
  * Class ilTestParticipantsGUI
  *
@@ -58,7 +60,8 @@ public function __construct(
         protected ilCtrl $ctrl,
         protected ilDBInterface $db,
         protected ilTabsGUI $tabs,
-        protected ilToolbarGUI $toolbar
+        protected ilToolbarGUI $toolbar,
+        protected InternalRequestService $testrequest
     ) {
         $this->participant_access_filter = new ilTestParticipantAccessFilterFactory($access);
     }
@@ -328,15 +331,16 @@ protected function addFinishAllPassesButton(ilToolbarGUI $toolbar): void
     protected function saveClientIpCmd(): void
     {
         $filter_closure = $this->participant_access_filter->getManageParticipantsUserFilter($this->getTestObj()->getRefId());
-        $a_user_ids = $filter_closure((array) $_POST["chbUser"]);
+        $selected_users = $filter_closure($this->testrequest->raw('chbUser') ?? []);
 
-        if (is_array($a_user_ids)) {
-            foreach ($a_user_ids as $user_id) {
-                $this->getTestObj()->setClientIP($user_id, $_POST["clientip_" . $user_id]);
-            }
-        } else {
+        if ($selected_users === []) {
             $this->main_tpl->setOnScreenMessage('info', $this->lng->txt("select_one_user"), true);
         }
+
+        foreach ($selected_users as $user_id) {
+            $this->getTestObj()->setClientIP($user_id, $_POST["clientip_" . $user_id]);
+        }
+
         $this->ctrl->redirect($this, self::CMD_SHOW);
     }
 
diff --git a/components/ILIAS/Test/tests/ilTestDashboardGUITest.php b/components/ILIAS/Test/tests/ilTestDashboardGUITest.php
index 9b4e8ed25c1d..d185b04312c1 100755
--- a/components/ILIAS/Test/tests/ilTestDashboardGUITest.php
+++ b/components/ILIAS/Test/tests/ilTestDashboardGUITest.php
@@ -54,7 +54,8 @@ protected function setUp(): void
             $DIC['ilCtrl'],
             $DIC['ilTabs'],
             $DIC['ilToolbar'],
-            $this->createMock(ilTestQuestionSetConfig::class)
+            $this->createMock(ilTestQuestionSetConfig::class),
+            $this->createMock(\ILIAS\Test\InternalRequestService::class)
         );
     }
 
diff --git a/components/ILIAS/Test/tests/ilTestParticipantsGUITest.php b/components/ILIAS/Test/tests/ilTestParticipantsGUITest.php
index e40d7c8291c3..03fbae78625f 100755
--- a/components/ILIAS/Test/tests/ilTestParticipantsGUITest.php
+++ b/components/ILIAS/Test/tests/ilTestParticipantsGUITest.php
@@ -54,7 +54,8 @@ protected function setUp(): void
             $DIC['ilCtrl'],
             $DIC['ilDB'],
             $DIC['ilTabs'],
-            $DIC['ilToolbar']
+            $DIC['ilToolbar'],
+            $this->createMock(\ILIAS\Test\InternalRequestService::class)
         );
     }