diff --git a/product/ERP5Type/tests/ERP5TypeTestCase.py b/product/ERP5Type/tests/ERP5TypeTestCase.py
index 02f7c03abf5e27872fbe9cef2e0347b984c9b027..7da91a5aa0c6de2440e6b75cdfc534815a3fa6cc 100644
--- a/product/ERP5Type/tests/ERP5TypeTestCase.py
+++ b/product/ERP5Type/tests/ERP5TypeTestCase.py
@@ -1069,7 +1069,7 @@ class ERP5TypeTestCase(backportUnittest.TestCase, PortalTestCase):
         portal_activities = self.portal.portal_activities
         # Drop remaining activities.
         count = portal_activities.countMessage()
-        portal_activities.manageClearActivities()
+        portal_activities.manageClearActivities(keep=False)
         if count:
           LOG('Products.ERP5Type.tests.ERP5TypeTestCase.beforeClose', DEBUG,
               'dropped %d left-over activity messages' % (count,))