diff --git a/addons/calendar/models/mail_activity.py b/addons/calendar/models/mail_activity.py
index 43d6743eece..da30c6629d4 100644
--- a/addons/calendar/models/mail_activity.py
+++ b/addons/calendar/models/mail_activity.py
@@ -39,10 +39,7 @@ class MailActivity(models.Model):
         return super(MailActivity, self)._action_done(feedback=feedback, attachment_ids=attachment_ids)
 
     def unlink_w_meeting(self):
-        return self.unlink()
-
-    def unlink(self):
         events = self.mapped('calendar_event_id')
-        res = super().unlink()
+        res = self.unlink()
         events.unlink()
         return res
diff --git a/addons/calendar/tests/test_mail_activity_mixin.py b/addons/calendar/tests/test_mail_activity_mixin.py
index 70c5768b10f..c991b407209 100644
--- a/addons/calendar/tests/test_mail_activity_mixin.py
+++ b/addons/calendar/tests/test_mail_activity_mixin.py
@@ -77,3 +77,6 @@ class TestMailActivityMixin(MailCommon):
             self.assertEqual(test_record.activity_calendar_event_id.name, ev1.name, "This should be the calendar event of the next activity")
 
             act1._action_done(feedback="Mark activity as done with text")
+
+            self.assertFalse(act1.exists(), "activity marked as done should be deleted")
+            self.assertTrue(ev1.exists(), "event of done activity must not be deleted")