diff --git a/src/plone/restapi/tests/test_dxcontent_serializer.py b/src/plone/restapi/tests/test_dxcontent_serializer.py
index 1704a115e0..1a0b031337 100644
--- a/src/plone/restapi/tests/test_dxcontent_serializer.py
+++ b/src/plone/restapi/tests/test_dxcontent_serializer.py
@@ -27,6 +27,7 @@
 from zope.component import queryUtility
 from zope.interface import Interface
 from zope.publisher.interfaces.browser import IBrowserRequest
+from plone.restapi.tests.base import TestSerializer
 
 import json
 import unittest