diff --git a/hb_server/apps/qm/serializers.py b/hb_server/apps/qm/serializers.py
index 6e32740..b0d8054 100644
--- a/hb_server/apps/qm/serializers.py
+++ b/hb_server/apps/qm/serializers.py
@@ -56,7 +56,7 @@ class TestRecordItemSerializer(serializers.ModelSerializer):
     rule_expression = serializers.JSONField(source='form_field.rule_expression', read_only=True)
     display_expression = serializers.JSONField(source='form_field.display_expression', read_only=True)
     is_hidden = serializers.BooleanField(source='form_field.is_hidden', read_only=True)
-    parent = serializers.IntegerField(source='form_field.parent', read_only=True)
+    parent = serializers.PrimaryKeyRelatedField(source='form_field.parent', read_only=True)
     help_text = serializers.CharField(source='form_field.help_text', read_only=True)
     sort = serializers.IntegerField(source='form_field.sort', read_only=True)
     class Meta: