diff --git a/Modules/Test/classes/class.ilTestQuestionRelatedObjectivesList.php b/Modules/Test/classes/class.ilTestQuestionRelatedObjectivesList.php
index 19c54c7ae581..25e0db02da6f 100644
--- a/Modules/Test/classes/class.ilTestQuestionRelatedObjectivesList.php
+++ b/Modules/Test/classes/class.ilTestQuestionRelatedObjectivesList.php
@@ -88,8 +88,8 @@ public function loadObjectivesTitles()
      */
     public function getQuestionRelatedObjectiveTitles($questionId): string
     {
-        if (!isset($this->objectivesByQuestion['questionId'])
-            || !is_array($this->objectivesByQuestion['questionId'])) {
+        if (!isset($this->objectivesByQuestion[$questionId])
+            || !is_array($this->objectivesByQuestion[$questionId])) {
             return '';
         }
 
@@ -135,8 +135,8 @@ public function getObjectives(): array
 
     public function isQuestionRelatedToObjective($questionId, $objectiveId): bool
     {
-        if (!isset($this->objectivesByQuestion['questionId'])
-            || !is_array($this->objectivesByQuestion['questionId'])) {
+        if (!isset($this->objectivesByQuestion[$questionId])
+            || !is_array($this->objectivesByQuestion[$questionId])) {
             return false;
         }