diff --git a/date_range/tests/test_date_range.py b/date_range/tests/test_date_range.py
index 398d663..87e86b6 100644
--- a/date_range/tests/test_date_range.py
+++ b/date_range/tests/test_date_range.py
@@ -3,13 +3,13 @@
 
 import datetime
 
+import odoo
 from odoo.exceptions import ValidationError
 from odoo.tests.common import TransactionCase
 
 
+@odoo.tests.tagged('post_install', '-at_install')
 class DateRangeTest(TransactionCase):
-    post_install = True
-    at_install = False
 
     def setUp(self):
         super(DateRangeTest, self).setUp()
diff --git a/date_range/tests/test_date_range_generator.py b/date_range/tests/test_date_range_generator.py
index 9bbe929..5f44cb2 100644
--- a/date_range/tests/test_date_range_generator.py
+++ b/date_range/tests/test_date_range_generator.py
@@ -5,13 +5,13 @@ import datetime
 
 from dateutil.rrule import MONTHLY
 
+import odoo
 from odoo.exceptions import ValidationError
 from odoo.tests.common import TransactionCase
 
 
+@odoo.tests.tagged('post_install', '-at_install')
 class DateRangeGeneratorTest(TransactionCase):
-    post_install = True
-    at_install = False
 
     def setUp(self):
         super(DateRangeGeneratorTest, self).setUp()
diff --git a/date_range/tests/test_date_range_type.py b/date_range/tests/test_date_range_type.py
index 51519ff..e00c899 100644
--- a/date_range/tests/test_date_range_type.py
+++ b/date_range/tests/test_date_range_type.py
@@ -3,14 +3,14 @@
 
 from psycopg2 import IntegrityError
 
+import odoo
 from odoo.exceptions import ValidationError
 from odoo.tests.common import TransactionCase
 from odoo.tools import mute_logger
 
 
+@odoo.tests.tagged('post_install', '-at_install')
 class DateRangeTypeTest(TransactionCase):
-    post_install = True
-    at_install = False
 
     def setUp(self):
         super(DateRangeTypeTest, self).setUp()