diff --git a/server/apps/exam/views.py b/server/apps/exam/views.py
index 93a1d50..4f5a2c3 100644
--- a/server/apps/exam/views.py
+++ b/server/apps/exam/views.py
@@ -558,7 +558,7 @@ class ExamRecordViewSet(ListModelMixin, DestroyModelMixin, RetrieveModelMixin, G
     def get_serializer_class(self):
         if self.action == 'retrieve':
             now = timezone.now()
-            if now > self.get_object().exam.end_time:
+            if now > self.get_object().exam.close_time:
                 return ExamRecordDetailSerializer
         return super().get_serializer_class()