diff --git a/mod/quiz/overrides.php b/mod/quiz/overrides.php
index fafcb4fa308..739504804d8 100644
--- a/mod/quiz/overrides.php
+++ b/mod/quiz/overrides.php
@@ -88,7 +88,7 @@ $headers = [];
 
 // Fetch all overrides.
 if ($groupmode) {
-    $colname = get_string('group');
+    $headers[] = get_string('group');
     // To filter the result by the list of groups that the current user has access to.
     if ($groups) {
         $params = ['quizid' => $quiz->id];
diff --git a/mod/quiz/tests/behat/quiz_group_override.feature b/mod/quiz/tests/behat/quiz_group_override.feature
index f9586310db0..69ed5e05fea 100644
--- a/mod/quiz/tests/behat/quiz_group_override.feature
+++ b/mod/quiz/tests/behat/quiz_group_override.feature
@@ -76,6 +76,9 @@ Feature: Quiz group override
       | Attempts allowed | 2       |
     And I press "Save"
     Then "Group 1" "table_row" should exist
+    # Check all column headers are present.
+    And I should see "Group" in the "Overrides" "table_row"
+    And I should see "Action" in the "Overrides" "table_row"
 
   Scenario: A teacher with accessallgroups permission should see all group overrides
     Given the following "mod_quiz > group overrides" exist: