diff --git a/addons/mass_mailing/models/mass_mailing.py b/addons/mass_mailing/models/mass_mailing.py
index 86ded7246b9..922ecea9fe7 100644
--- a/addons/mass_mailing/models/mass_mailing.py
+++ b/addons/mass_mailing/models/mass_mailing.py
@@ -153,10 +153,10 @@ class MassMailingCampaign(models.Model):
     mass_mailing_ids = fields.One2many(
         'mail.mass_mailing', 'mass_mailing_campaign_id',
         string='Mass Mailings')
-    unique_ab_testing = fields.Boolean(string='AB Testing',
-        help='If checked, recipients will be mailed only once, allowing to send '
-             'various mailings in a single campaign to test the effectiveness '
-             'of the mailings.')
+    unique_ab_testing = fields.Boolean(string='Allow A/B Testing', default=True,
+        help='If checked, recipients will be mailed only once for the whole campaign. '
+             'This lets you send different mailings to randomly selected recipients and test '
+             'the effectiveness of the mailings, without causing duplicate messages.')
     color = fields.Integer(string='Color Index')
     clicks_ratio = fields.Integer(compute="_compute_clicks_ratio", string="Number of clicks")
     # stat fields
diff --git a/addons/mass_mailing/views/mass_mailing_views.xml b/addons/mass_mailing/views/mass_mailing_views.xml
index ef33f09ef2e..558782d7d2a 100644
--- a/addons/mass_mailing/views/mass_mailing_views.xml
+++ b/addons/mass_mailing/views/mass_mailing_views.xml
@@ -691,6 +691,7 @@
                             <field name="name" string="Campaign Name"/>
                             <field name="user_id"/>
                             <field name="tag_ids" widget="many2many_tags" options="{'no_create_edit': True}"/>
+                            <field name="unique_ab_testing" groups="base.group_no_one"/>
                         </group>
                         <notebook>
                             <page string="Tracking">