diff --git a/account_financial_test_data/__openerp__.py b/account_financial_test_data/__openerp__.py
index 8f7c95e4..eb4044f0 100644
--- a/account_financial_test_data/__openerp__.py
+++ b/account_financial_test_data/__openerp__.py
@@ -1,4 +1,4 @@
-# -*- encoding: utf-8 -*-
+# -*- coding: utf-8 -*-
 ##############################################################################
 #
 #    OpenERP, Open Source Management Solution
diff --git a/account_financial_test_data/models/__init__.py b/account_financial_test_data/models/__init__.py
index 955bc4c3..71f1420d 100644
--- a/account_financial_test_data/models/__init__.py
+++ b/account_financial_test_data/models/__init__.py
@@ -1,3 +1,3 @@
 # -*- coding: utf-8 -*-
 
-import account_installer
+from . import account_installer
diff --git a/account_financial_test_data/models/account_installer.py b/account_financial_test_data/models/account_installer.py
index cd49d41a..feb90341 100644
--- a/account_financial_test_data/models/account_installer.py
+++ b/account_financial_test_data/models/account_installer.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 import logging
 from openerp.osv import orm
-from openerp import models, fields, api, _, exceptions
+from openerp import models, api
 
 _logger = logging.getLogger(__name__)
 
diff --git a/account_financial_test_data/pos_install.py b/account_financial_test_data/pos_install.py
index b84eb843..b554cbcf 100644
--- a/account_financial_test_data/pos_install.py
+++ b/account_financial_test_data/pos_install.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 from datetime import date, datetime
-from openerp import SUPERUSER_ID, api, tools, _
+from openerp import SUPERUSER_ID, api
 
 
 def post_init_hook(cr, registry):
@@ -56,7 +56,8 @@ def post_init_hook(cr, registry):
         account_setting = account_setting_obj.create({})
         account_setting.group_multi_currency = True
         account_setting.default_sale_tax_id = env.ref('l10n_fr.tva_normale').id
-        account_setting.default_purchase_tax_id = env.ref('l10n_fr.tva_normale').id
+        account_setting.default_purchase_tax_id = env.ref(
+            'l10n_fr.tva_normale').id
         account_setting.execute()
 
         return True
@@ -110,7 +111,8 @@ def post_init_hook(cr, registry):
 
         invoice_obj = env['account.invoice']
 
-        invoice_a = invoice_obj.create({
+        # invoice_a
+        invoice_obj.create({
             'partner_id': env.ref(
                 'account_financial_test_data.data_partner_c').id,
             'account_id': env.ref(
@@ -121,7 +123,8 @@ def post_init_hook(cr, registry):
             'date_due': date(last_year, 1, 31),
         })
 
-        invoice_b = invoice_obj.create({
+        # invoice_b
+        invoice_obj.create({
             'partner_id': env.ref(
                 'account_financial_test_data.data_partner_a').id,
             'type': 'out_invoice',
@@ -132,7 +135,8 @@ def post_init_hook(cr, registry):
             'date_due': date(last_year, 2, 4),
         })
 
-        invoice_c = invoice_obj.create({
+        # invoice_c
+        invoice_obj.create({
             'partner_id': env.ref(
                 'account_financial_test_data.data_partner_d').id,
             'type': 'out_invoice',
@@ -143,7 +147,8 @@ def post_init_hook(cr, registry):
             'date_due': date(this_year, 3, 10),
         })
 
-        invoice_d = invoice_obj.create({
+        # invoice_d
+        invoice_obj.create({
             'partner_id': env.ref(
                 'account_financial_test_data.data_partner_g').id,
             'type': 'out_refund',
@@ -154,7 +159,8 @@ def post_init_hook(cr, registry):
             'date_due': date(this_year, 4, 15),
         })
 
-        invoice_e = invoice_obj.create({
+        # invoice_e
+        invoice_obj.create({
             'partner_id': env.ref(
                 'account_financial_test_data.data_partner_b').id,
             'type': 'out_invoice',
@@ -165,7 +171,8 @@ def post_init_hook(cr, registry):
             'date_due': date(this_year, 2, 15),
         })
 
-        invoice_f = invoice_obj.create({
+        # invoice_f
+        invoice_obj.create({
             'partner_id': env.ref(
                 'account_financial_test_data.data_partner_a').id,
             'type': 'out_invoice',
@@ -176,7 +183,8 @@ def post_init_hook(cr, registry):
             'date_due': date(this_year, 3, 24),
         })
 
-        invoice_g = invoice_obj.create({
+        # invoice_g
+        invoice_obj.create({
             'partner_id': env.ref(
                 'account_financial_test_data.data_partner_g').id,
             'type': 'out_invoice',
@@ -187,7 +195,8 @@ def post_init_hook(cr, registry):
             'date_due': date(this_year, 4, 15),
         })
 
-        invoice_h = invoice_obj.create({
+        # invoice_h
+        invoice_obj.create({
             'partner_id': env.ref(
                 'account_financial_test_data.data_partner_f').id,
             'type': 'out_invoice',