diff --git a/uncloud/uncloud_vm/tests.py b/uncloud/uncloud_vm/tests.py
index c51f597..8d7994f 100644
--- a/uncloud/uncloud_vm/tests.py
+++ b/uncloud/uncloud_vm/tests.py
@@ -1,5 +1,7 @@
 import datetime
 
+import parsedatetime
+
 from django.test import TestCase
 from django.contrib.auth import get_user_model
 from django.utils import timezone
@@ -9,6 +11,7 @@ from uncloud_vm.models import VMDiskImageProduct, VMDiskProduct, VMProduct, VMHo
 from uncloud_pay.models import Order
 
 User = get_user_model()
+cal = parsedatetime.Calendar()
 
 
 # If you want to check the test database using some GUI/cli tool
@@ -41,13 +44,14 @@ class VMTestCase(TestCase):
         super().setUp()
 
     def create_sample_vm(self, owner):
+        one_month_later, parse_status = cal.parse("1 month later")
         return VMProduct.objects.create(
             vmhost=self.vm_host, cores=2, ram_in_gb=4, owner=owner,
             order=Order.objects.create(
                 owner=owner,
                 creation_date=datetime.datetime.now(tz=timezone.utc),
                 starting_date=datetime.datetime.now(tz=timezone.utc),
-                ending_date=datetime.datetime(2020, 4, 2, tzinfo=timezone.utc),
+                ending_date=datetime.datetime(*one_month_later[:6], tzinfo=timezone.utc),
                 recurring_price=4.0, one_time_price=5.0, recurring_period='per_month'
             )
         )
@@ -59,7 +63,7 @@ class VMTestCase(TestCase):
         vm = self.create_sample_vm(owner=self.user)
 
         pending_disk_image = VMDiskImageProduct.objects.create(
-            owner=self.user, name='alpine3.11', is_os_image=True, is_public=True, size_in_gb=10,
+            owner=self.user, name='pending_disk_image', is_os_image=True, is_public=True, size_in_gb=10,
             status='pending'
         )
         try:
@@ -78,7 +82,7 @@ class VMTestCase(TestCase):
         """Ensure that a user can only create a VMDiskProduct for an existing VM"""
 
         disk_image = VMDiskImageProduct.objects.create(
-            owner=self.user, name='alpine3.11', is_os_image=True, is_public=True, size_in_gb=10,
+            owner=self.user, name='disk_image', is_os_image=True, is_public=True, size_in_gb=10,
             status='active'
         )
 
@@ -102,7 +106,7 @@ class VMTestCase(TestCase):
                 owner=self.user, vm=someone_else_vm,
                 size_in_gb=10,
                 image=VMDiskImageProduct.objects.create(
-                    owner=self.user, name='alpine3.11', is_os_image=True, is_public=True, size_in_gb=10,
+                    owner=self.user, name='disk_image', is_os_image=True, is_public=True, size_in_gb=10,
                     status='active'
                 )
             )