diff --git a/device.xml b/device.xml
index bb8b2ac..77d73b2 100644
--- a/device.xml
+++ b/device.xml
@@ -32,7 +32,7 @@ copyright notices and license terms. -->
 
         <record model="ir.rule.group" id="rule_group_sale_device">
             <field name="name">User in company</field>
-            <field name="model" search="[('model', '=', 'sale.device')]"/>
+            <field name="model">sale.device</field>
             <field name="global_p" eval="True"/>
         </record>
         <record model="ir.rule" id="rule_sale_device">
diff --git a/sale.py b/sale.py
index 06b3d78..9e8cbd2 100644
--- a/sale.py
+++ b/sale.py
@@ -164,7 +164,7 @@ class Sale(metaclass=PoolMeta):
             ).select(
                 sale.id,
                 where=(And([
-                    sale.total_amount_cache != None,
+                    sale.total_amount_cache is not None,
                     sale.state.in_([
                         'draft',
                         'quotation',
diff --git a/sale.xml b/sale.xml
index e1c245b..96b5561 100644
--- a/sale.xml
+++ b/sale.xml
@@ -56,13 +56,13 @@ copyright notices and license terms. -->
 	<record model="ir.model.button" id="sale_change_payment_method_wizard_button">
             <field name="name">wizard_change_payment_method</field>
             <field name="string">Change Payment Method</field>
-            <field name="model" search="[('model', '=', 'sale.sale')]"/>
+            <field name="model">sale.sale</field>
         </record>
 	
         <record model="ir.model.button" id="sale_payment_wizard_button">
             <field name="name">wizard_sale_payment</field>
             <field name="string">Pay</field>
-            <field name="model" search="[('model', '=', 'sale.sale')]"/>
+            <field name="model">sale.sale</field>
         </record>
     </data>
 </tryton>
diff --git a/statement.xml b/statement.xml
index 4e7911b..fcd36bd 100644
--- a/statement.xml
+++ b/statement.xml
@@ -145,7 +145,7 @@ copyright notices and license terms. -->
             action="act_configuration_closures_form"/>
 
         <record model="ir.model.access" id="access_sale_statement">
-            <field name="model" search="[('model', '=', 'account.statement')]"/>
+            <field name="model">account.statement</field>
             <field name="group" ref="sale.group_sale"/>
             <field name="perm_read" eval="True"/>
             <field name="perm_write" eval="True"/>
@@ -153,7 +153,7 @@ copyright notices and license terms. -->
             <field name="perm_delete" eval="False"/>
         </record>
         <record model="ir.model.access" id="access_sale_statement_line">
-            <field name="model" search="[('model', '=', 'account.statement.line')]"/>
+            <field name="model">account.statement.line</field>
             <field name="group" ref="sale.group_sale"/>
             <field name="perm_read" eval="True"/>
             <field name="perm_write" eval="True"/>
@@ -161,7 +161,7 @@ copyright notices and license terms. -->
             <field name="perm_delete" eval="False"/>
         </record>
         <record model="ir.model.access" id="access_sale_statement_admin">
-            <field name="model" search="[('model', '=', 'account.statement')]"/>
+            <field name="model">account.statement</field>
             <field name="group" ref="sale.group_sale_admin"/>
             <field name="perm_read" eval="True"/>
             <field name="perm_write" eval="True"/>
@@ -169,7 +169,7 @@ copyright notices and license terms. -->
             <field name="perm_delete" eval="False"/>
         </record>
         <record model="ir.model.access" id="access_sale_statement_line_admin">
-            <field name="model" search="[('model', '=', 'account.statement.line')]"/>
+            <field name="model">account.statement.line</field>
             <field name="group" ref="sale.group_sale_admin"/>
             <field name="perm_read" eval="True"/>
             <field name="perm_write" eval="True"/>
@@ -178,7 +178,7 @@ copyright notices and license terms. -->
         </record>
 
         <record model="ir.model.access" id="access_statement_account_move">
-            <field name="model" search="[('model', '=', 'account.move')]"/>
+            <field name="model">account.move</field>
             <field name="group" ref="account_statement.group_statement"/>
             <field name="perm_read" eval="True"/>
             <field name="perm_write" eval="True"/>
@@ -186,7 +186,7 @@ copyright notices and license terms. -->
             <field name="perm_delete" eval="False"/>
         </record>
         <record model="ir.model.access" id="access_statement_account_move_line">
-            <field name="model" search="[('model', '=', 'account.move.line')]"/>
+            <field name="model">account.move.line</field>
             <field name="group" ref="account_statement.group_statement"/>
             <field name="perm_read" eval="True"/>
             <field name="perm_write" eval="True"/>
diff --git a/tests/scenario_sale_payment.rst b/tests/scenario_sale_payment.rst
index 8753d1a..2a52c36 100644
--- a/tests/scenario_sale_payment.rst
+++ b/tests/scenario_sale_payment.rst
@@ -116,7 +116,7 @@ Create journals::
     >>> StatementJournal = Model.get('account.statement.journal')
     >>> Journal = Model.get('account.journal')
     >>> SequenceType = Model.get('ir.sequence.type')
-    >>> sequence_type, = SequenceType.find([('name', '=', 'Account Journal')])
+    >>> sequence_type, = SequenceType.find([('name', '=', 'Account Move')])
     >>> sequence = Sequence(name='Statement',
     ...     sequence_type=sequence_type,
     ...     company=company,
@@ -124,7 +124,6 @@ Create journals::
     >>> sequence.save()
     >>> account_journal = Journal(name='Statement',
     ...     type='statement',
-    ...     sequence=sequence,
     ... )
     >>> account_journal.save()
     >>> statement_journal = StatementJournal(name='Default',
@@ -174,7 +173,7 @@ Create account user::
     >>> account_user = User()
     >>> account_user.name = 'Account'
     >>> account_user.login = 'account'
-    >>> account_group, = Group.find([('name', '=', 'Account')])
+    >>> account_group, = Group.find([('name', '=', 'Accounting')])
     >>> account_user.groups.append(account_group)
     >>> account_user.shops.append(shop)
     >>> account_user.shop = shop
@@ -191,6 +190,7 @@ Sale services::
     >>> sale_line = sale.lines.new()
     >>> sale_line.product = product
     >>> sale_line.quantity = 2.0
+    >>> sale_line.unit_price = Decimal('10.00')
     >>> sale.save()
     >>> len(sale.shipments), len(sale.invoices), len(sale.payments)
     (0, 0, 0)
diff --git a/tryton.cfg b/tryton.cfg
index d406979..7a0a687 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=6.8.0
+version=7.6.0
 depends:
     account_statement
     sale_shop