diff --git a/partner_firstname/partner.py b/partner_firstname/partner.py
index 4be5cca8d..938709490 100644
--- a/partner_firstname/partner.py
+++ b/partner_firstname/partner.py
@@ -91,7 +91,7 @@ class ResPartner(orm.Model):
 
         return self.write(cursor, uid, partner_id, vals, context=context)
 
-    def copy_data(self, cr, uid, _id, default=None, context=None):
+    def copy_data(self, cr, uid, id, default=None, context=None):
         """
         Avoid to replicate the firstname into the name when duplicating a
         partner
@@ -101,13 +101,13 @@ class ResPartner(orm.Model):
             default = default.copy()
             default['lastname'] = (
                 _('%s (copy)') % self.read(
-                    cr, uid, [_id], ['lastname'], context=context
+                    cr, uid, [id], ['lastname'], context=context
                     )[0]['lastname']
             )
             if default.get('name'):
                 del(default['name'])
         return super(ResPartner, self).copy_data(
-            cr, uid, _id, default, context=context)
+            cr, uid, id, default, context=context)
 
     def create(self, cursor, uid, vals, context=None):
         """
diff --git a/partner_firstname/tests/__init__.py b/partner_firstname/tests/__init__.py
index 5c1049505..71518a9dc 100644
--- a/partner_firstname/tests/__init__.py
+++ b/partner_firstname/tests/__init__.py
@@ -29,7 +29,3 @@
 ##############################################################################
 
 from . import test_partner_firstname
-
-checks = [
-    test_partner_firstname
-]