diff --git a/product/ERP5/tests/testCrmReports.py b/product/ERP5/tests/testCrmReports.py
index e898d28b70fed296e28b9dc67da9e2f9c5f0938c..76babf2f5920d4c0d631a3d3b3a0c19dd1942d2e 100644
--- a/product/ERP5/tests/testCrmReports.py
+++ b/product/ERP5/tests/testCrmReports.py
@@ -129,7 +129,7 @@ class CrmTestCase(ERP5ReportTestCase):
       self._doWorkflowAction(ev,'assign_action',
                          follow_up_ticket_type = ticket.getPortalType(),
                          follow_up_ticket_title = ticket.getTitle())
-      ev.acknowledge()
+      self._doWorkflowAction(ev, 'acknowledge_action')
     elif simulation_state == 'cancelled':
       ev.receive()
       ev.cancel()