diff --git a/bt5/erp5_km/TestTemplateItem/portal_components/test.erp5.testKM.py b/bt5/erp5_km/TestTemplateItem/portal_components/test.erp5.testKM.py
index 347cbff391e7238eff3580b64e9dd10f218c50f8..c844a4b556ef2cc850fb895b56c4a8b4d8569df9 100644
--- a/bt5/erp5_km/TestTemplateItem/portal_components/test.erp5.testKM.py
+++ b/bt5/erp5_km/TestTemplateItem/portal_components/test.erp5.testKM.py
@@ -711,7 +711,7 @@ class TestKM(TestKMMixIn):
                                      gadget_view_form_id)
 
     # no related docs should exist
-    self.assertIn('No result.', relation_form_renderer())
+    self.assertIn(b'No result.', relation_form_renderer())
 
     # set related docs
     similar_doc = portal.web_page_module.newContent(