diff --git a/contract_purchase/__init__.py b/contract_purchase/__init__.py
index a0fdc10f..b20c0517 100644
--- a/contract_purchase/__init__.py
+++ b/contract_purchase/__init__.py
@@ -1,2 +1,5 @@
 # -*- coding: utf-8 -*-
+# © 2017 Stefan Becker <s.becker@humanilog.org>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
 from . import models
diff --git a/contract_purchase/models/__init__.py b/contract_purchase/models/__init__.py
index d90384df..e49b1856 100644
--- a/contract_purchase/models/__init__.py
+++ b/contract_purchase/models/__init__.py
@@ -1,2 +1,5 @@
 # -*- coding: utf-8 -*-
+# © 2017 Stefan Becker <s.becker@humanilog.org>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
 from . import account
diff --git a/contract_purchase/models/account.py b/contract_purchase/models/account.py
index e953a843..b7c60132 100644
--- a/contract_purchase/models/account.py
+++ b/contract_purchase/models/account.py
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
-# © 2015 Angel Moya <angel.moya@domatix.com>
-# © 2016 Carlos Dauden <carlos.dauden@tecnativa.com>
+# © 2017 Stefan Becker <s.becker@humanilog.org>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from openerp import api, fields, models, _
diff --git a/contract_purchase/tests/__init__.py b/contract_purchase/tests/__init__.py
new file mode 100644
index 00000000..188076a3
--- /dev/null
+++ b/contract_purchase/tests/__init__.py
@@ -0,0 +1,5 @@
+# -*- coding: utf-8 -*-
+# © 2017 Stefan Becker <s.becker@humanilog.org>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import test_contract
\ No newline at end of file
diff --git a/contract_purchase/tests/test_contract.py b/contract_purchase/tests/test_contract.py
new file mode 100644
index 00000000..5a6cc912
--- /dev/null
+++ b/contract_purchase/tests/test_contract.py
@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+# © 2017 Stefan Becker <s.becker@humanilog.org>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from openerp.exceptions import ValidationError
+from openerp.tests.common import SavepointCase
+
+class TestContract(SavepointCase):
+    @classmethod
+    def setUpClass(cls):
+        super(TestContract, cls).setUpClass()
+
+        cls.partner = cls.env.ref('base.res_partner_2')
+
+        cls.product = cls.env.ref('product.product_product_2')
+        cls.product.description_sale = 'Test description sale'
+
+        cls.purchase_journal = cls.env['account.journal'].create({
+            'name': 'Purchase Journal',
+            'type': 'purchase',
+            'company_id': cls.env.user.company_id.id,
+            'code': '1337'
+        })
+
+        contract = cls.env['account.analytic.account'].new({
+            'name': 'Test Contract',
+            'type': 'purchase',
+            'company_id': cls.env.user.company_id.id,
+            'partner_id': cls.partner.id,
+            'pricelist_id': cls.partner.property_product_pricelist.id,
+            'recurring_invoices': True,
+            'date_start': '2016-02-15',
+            'recurring_next_date': '2016-02-29',
+        })
+        contract.onchange_type()
+        cls.contract = cls.env['account.analytic.account'].create(
+            contract._convert_to_write(contract._cache))
+
+        cls.contract_line = cls.env['account.analytic.invoice.line'].create({
+            'analytic_account_id': cls.contract.id,
+            'product_id': cls.product.id,
+            'name': 'Services from #START# to #END#',
+            'quantity': 1,
+            'uom_id': cls.product.uom_id.id,
+            'price_unit': 100,
+            'discount': 50,
+        })
+
+    def test_contract(self):
+        self.assertEqual(self.contract.journal_id, self.purchase_journal)
+
+        new_invoice = self.contract.recurring_create_invoice()
+        self.assertEqual(new_invoice.type, 'in_invoice')