diff --git a/uncloud_django_based/uncloud/uncloud_pay/tests.py b/uncloud_django_based/uncloud/uncloud_pay/tests.py
index 9e8728d..5236c8a 100644
--- a/uncloud_django_based/uncloud/uncloud_pay/tests.py
+++ b/uncloud_django_based/uncloud/uncloud_pay/tests.py
@@ -10,6 +10,11 @@ class BillingTestCase(TestCase):
         self.user = get_user_model().objects.create(
                 username='jdoe',
                 email='john.doe@domain.tld')
+        self.billing_address = BillingAddress.objects.create(
+                owner=self.user,
+                street="unknown",
+                city="unknown",
+                postal_code="unknown")
 
     def test_basic_monthly_billing(self):
         one_time_price = 10
@@ -25,7 +30,8 @@ class BillingTestCase(TestCase):
                 owner=self.user,
                 starting_date=starting_date,
                 ending_date=ending_date,
-                recurring_period=RecurringPeriod.PER_MONTH)
+                recurring_period=RecurringPeriod.PER_MONTH,
+                billing_address=self.billing_address)
         order.add_record(one_time_price, recurring_price, description)
 
         # Generate & check bill for first month: full recurring_price + setup.
@@ -59,7 +65,8 @@ class BillingTestCase(TestCase):
         order = Order.objects.create(
                 owner=self.user,
                 starting_date=starting_date,
-                recurring_period=RecurringPeriod.PER_YEAR)
+                recurring_period=RecurringPeriod.PER_YEAR,
+                billing_address=self.billing_address)
         order.add_record(one_time_price, recurring_price, description)
 
         # Generate & check bill for first year: recurring_price + setup.
@@ -100,7 +107,8 @@ class BillingTestCase(TestCase):
                 owner=self.user,
                 starting_date=starting_date,
                 ending_date=ending_date,
-                recurring_period=RecurringPeriod.PER_HOUR)
+                recurring_period=RecurringPeriod.PER_HOUR,
+                billing_address=self.billing_address)
         order.add_record(one_time_price, recurring_price, description)
 
         # Generate & check bill for first month: recurring_price + setup.
@@ -121,13 +129,20 @@ class ProductActivationTestCase(TestCase):
                 username='jdoe',
                 email='john.doe@domain.tld')
 
+        self.billing_address = BillingAddress.objects.create(
+                owner=self.user,
+                street="unknown",
+                city="unknown",
+                postal_code="unknown")
+
     def test_product_activation(self):
         starting_date = datetime.fromisoformat('2020-03-01')
 
         order = Order.objects.create(
                 owner=self.user,
                 starting_date=starting_date,
-                recurring_period=RecurringPeriod.PER_MONTH)
+                recurring_period=RecurringPeriod.PER_MONTH,
+                billing_address=self.billing_address)
         order.save()
 
         product = GenericServiceProduct(