diff --git a/backup/util/dbops/restore_dbops.class.php b/backup/util/dbops/restore_dbops.class.php
index 91be3c13619..fc0067ee771 100644
--- a/backup/util/dbops/restore_dbops.class.php
+++ b/backup/util/dbops/restore_dbops.class.php
@@ -619,7 +619,8 @@ abstract class restore_dbops {
             // Top-level category counter.
             $topcats = 0;
             // get categories in context (bank)
-            $categories = self::restore_get_question_categories($restoreid, $contextid);
+            $categories = self::restore_get_question_categories($restoreid, $contextid, $contextlevel);
+
             // cache permissions if $targetcontext is found
             if ($targetcontext = self::restore_find_best_target_context($categories, $courseid, $contextlevel)) {
                 $canmanagecategory = has_capability('moodle/question:managecategory', $targetcontext, $userid);
@@ -765,8 +766,13 @@ abstract class restore_dbops {
     /**
      * Return one array of question_category records for
      * a given restore operation and one restore context (question bank)
+     *
+     * @param string $restoreid Unique identifier of the restore operation being performed.
+     * @param int $contextid Context id we want question categories to be returned.
+     * @param int $contextlevel Context level we want to restrict the returned categories.
+     * @return array Question categories for the given context id and level.
      */
-    public static function restore_get_question_categories($restoreid, $contextid) {
+    public static function restore_get_question_categories($restoreid, $contextid, $contextlevel) {
         global $DB;
 
         $results = array();
@@ -776,7 +782,14 @@ abstract class restore_dbops {
                                           AND itemname = 'question_category'
                                           AND parentitemid = ?", array($restoreid, $contextid));
         foreach ($qcats as $qcat) {
-            $results[$qcat->itemid] = backup_controller_dbops::decode_backup_temp_info($qcat->info);
+            $result = backup_controller_dbops::decode_backup_temp_info($qcat->info);
+            // Filter out found categories that belong to another context level.
+            // (this can happen when a higher level category becomes remapped to
+            // a context id that, by coincidence, matches a context id of another
+            // category at lower level). See MDL-72950 for more info.
+            if ($result->contextlevel == $contextlevel) {
+                $results[$qcat->itemid] = $result;
+            }
         }
         $qcats->close();
 
diff --git a/mod/quiz/tests/restore_attempt_test.php b/mod/quiz/tests/restore_attempt_test.php
index 2ed2e854b30..5fd21c18c9b 100644
--- a/mod/quiz/tests/restore_attempt_test.php
+++ b/mod/quiz/tests/restore_attempt_test.php
@@ -47,11 +47,6 @@ class restore_attempt_test extends \advanced_testcase {
     public function test_restore_question_attempts_missing_users(): void {
         global $DB, $USER;
 
-        // TODO: Remove this once MDL-72950 is fixed.
-        if ($DB->get_dbfamily() == 'oracle') {
-            $this->markTestSkipped("Skipping for Oracle until MDL-72950 is fixed.");
-        }
-
         $this->resetAfterTest();
         $this->setAdminUser();