diff --git a/Tests/Integration/test-preferences.py b/Tests/Integration/test-preferences.py
index e49e82dd2..a13eb16be 100644
--- a/Tests/Integration/test-preferences.py
+++ b/Tests/Integration/test-preferences.py
@@ -46,7 +46,7 @@ class preferencesTest(unittest.TestCase):
 
     def testPreventInvitationsWhiteList(self):
       """Add to the PreventInvitations Whitelist"""
-      self.prefs.set("whiteList", white_listed_attendee)
+      self.prefs.set("whiteList", simplejson.dumps(white_listed_attendee))
       whitelist = self.prefs.get_settings('Calendar')['PreventInvitationsWhitelist']
       self.assertEqual(whitelist, white_listed_attendee)
 
diff --git a/Tests/Integration/test-prevent-invitations.py b/Tests/Integration/test-prevent-invitations.py
index a1ec81b1f..4493597db 100755
--- a/Tests/Integration/test-prevent-invitations.py
+++ b/Tests/Integration/test-prevent-invitations.py
@@ -56,7 +56,7 @@ class preventInvitationsTest(unittest.TestCase):
       """ Set PreventInvitation add to WhiteList and accept the Invitation"""
       #- First, add the Organiser to the Attendee's whitelist
       self.prefs.set('enablePreventInvitations', '0')
-      self.prefs.set("whiteList", white_listed_attendee)
+      self.prefs.set("whiteList", simplejson.dumps(white_listed_attendee))
       whitelist = self.prefs.get_settings('Calendar')['PreventInvitationsWhitelist']
       self.assertEqual(whitelist, white_listed_attendee)