diff --git a/account_tax_chart_interval/models/account_tax_code.py b/account_tax_chart_interval/models/account_tax_code.py
index 24ff01ca1..8b1baaa08 100644
--- a/account_tax_chart_interval/models/account_tax_code.py
+++ b/account_tax_chart_interval/models/account_tax_code.py
@@ -25,4 +25,5 @@ class AccountTaxCode(models.Model):
                               move_state))[self.id]
         else:
             self.sum_period = super(AccountTaxCode,
-                                    self)._sum_period('sum_period', [])[self.id]
+                                    self)._sum_period('sum_period',
+                                                      [])[self.id]
diff --git a/account_tax_chart_interval/wizard/account_tax_chart.py b/account_tax_chart_interval/wizard/account_tax_chart.py
index 3c6f766f8..ee90e0a5f 100644
--- a/account_tax_chart_interval/wizard/account_tax_chart.py
+++ b/account_tax_chart_interval/wizard/account_tax_chart.py
@@ -43,6 +43,6 @@ class AccountTaxChart(models.TransientModel):
             name = res['name']
             if name.find(':'):
                 name = name[:name.find(':')]
-            name += ":%s-%s" %(self.period_from.code, self.period_to.code)
+            name += ":%s-%s" % (self.period_from.code, self.period_to.code)
             res['name'] = name
         return res