Confirm support for Django 4.1

Replaces deprecated `django.utils.timezone.utc` with `datetime.timezone.utc` (available since Python 3.2).
2025-12-20 03:41:05 -05:00 · 2022-08-24 15:24:27 -05:00
parent 6b3775a8e9
commit a4f50c4340
25 changed files with 80 additions and 89 deletions
--- a/tests/test_amazon_ses_inbound.py
+++ b/tests/test_amazon_ses_inbound.py
@@ -1,11 +1,10 @@
 import json
 from base64 import b64encode
-from datetime import datetime
+from datetime import datetime, timezone
 from textwrap import dedent
 from unittest.mock import ANY, patch

 from django.test import tag
-from django.utils.timezone import utc

 from anymail.exceptions import AnymailAPIError, AnymailConfigurationError
 from anymail.inbound import AnymailInboundMessage
@@ -131,7 +130,7 @@ class AmazonSESInboundTests(WebhookTestCase, AmazonSESWebhookTestsMixin):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailInboundEvent)
        self.assertEqual(event.event_type, 'inbound')
-        self.assertEqual(event.timestamp, datetime(2018, 3, 30, 17, 21, 51, microsecond=636000, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2018, 3, 30, 17, 21, 51, microsecond=636000, tzinfo=timezone.utc))
        self.assertEqual(event.event_id, "jili9m351il3gkburn7o2f0u6788stij94c8ld01")
        self.assertIsInstance(event.message, AnymailInboundMessage)
        self.assertEqual(event.esp_event, raw_ses_event)
@@ -185,7 +184,7 @@ class AmazonSESInboundTests(WebhookTestCase, AmazonSESWebhookTestsMixin):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailInboundEvent)
        self.assertEqual(event.event_type, 'inbound')
-        self.assertEqual(event.timestamp, datetime(2018, 3, 30, 17, 21, 51, microsecond=636000, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2018, 3, 30, 17, 21, 51, microsecond=636000, tzinfo=timezone.utc))
        self.assertEqual(event.event_id, "jili9m351il3gkburn7o2f0u6788stij94c8ld01")
        self.assertIsInstance(event.message, AnymailInboundMessage)
        self.assertEqual(event.esp_event, raw_ses_event)
@@ -248,7 +247,7 @@ class AmazonSESInboundTests(WebhookTestCase, AmazonSESWebhookTestsMixin):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailInboundEvent)
        self.assertEqual(event.event_type, 'inbound')
-        self.assertEqual(event.timestamp, datetime(2018, 3, 30, 17, 21, 51, microsecond=636000, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2018, 3, 30, 17, 21, 51, microsecond=636000, tzinfo=timezone.utc))
        self.assertEqual(event.event_id, "fqef5sop459utgdf4o9lqbsv7jeo73pejig34301")
        self.assertIsInstance(event.message, AnymailInboundMessage)
        self.assertEqual(event.esp_event, raw_ses_event)
--- a/tests/test_amazon_ses_webhooks.py
+++ b/tests/test_amazon_ses_webhooks.py
@@ -1,10 +1,9 @@
 import json
 import warnings
-from datetime import datetime
+from datetime import datetime, timezone
 from unittest.mock import ANY, patch

 from django.test import SimpleTestCase, override_settings, tag
-from django.utils.timezone import utc

 from anymail.exceptions import AnymailConfigurationError, AnymailInsecureWebhookWarning
 from anymail.signals import AnymailTrackingEvent
@@ -116,7 +115,10 @@ class AmazonSESNotificationsTests(WebhookTestCase, AmazonSESWebhookTestsMixin):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "bounced")
        self.assertEqual(event.esp_event, raw_ses_event)
-        self.assertEqual(event.timestamp, datetime(2018, 3, 26, 17, 58, 59, microsecond=675000, tzinfo=utc))  # SNS
+        self.assertEqual(
+            event.timestamp,
+            datetime(2018, 3, 26, 17, 58, 59, microsecond=675000, tzinfo=timezone.utc)
+        )  # SNS
        self.assertEqual(event.message_id, "00000138111222aa-33322211-cccc-cccc-cccc-ddddaaaa0680-000000")
        self.assertEqual(event.event_id, "19ba9823-d7f2-53c1-860e-cb10e0d13dfc")
        self.assertEqual(event.recipient, "jane@example.com")
@@ -264,7 +266,10 @@ class AmazonSESNotificationsTests(WebhookTestCase, AmazonSESWebhookTestsMixin):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "sent")
        self.assertEqual(event.esp_event, raw_ses_event)
-        self.assertEqual(event.timestamp, datetime(2018, 3, 26, 17, 58, 59, microsecond=675000, tzinfo=utc))  # SNS
+        self.assertEqual(
+            event.timestamp,
+            datetime(2018, 3, 26, 17, 58, 59, microsecond=675000, tzinfo=timezone.utc)
+        )  # SNS
        self.assertEqual(event.message_id, "7c191be45-e9aedb9a-02f9-4d12-a87d-dd0099a07f8a-000000")
        self.assertEqual(event.event_id, "19ba9823-d7f2-53c1-860e-cb10e0d13dfc")
        self.assertEqual(event.recipient, "recipient@example.com")
--- a/tests/test_general_backend.py
+++ b/tests/test_general_backend.py
@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timezone
 from email.mime.text import MIMEText

 from django.core import mail
@@ -7,7 +7,6 @@ from django.core.mail import get_connection, send_mail
 from django.test import SimpleTestCase
 from django.test.utils import override_settings
 from django.utils.functional import Promise
-from django.utils.timezone import utc
 from django.utils.translation import gettext_lazy

 from anymail.backends.test import EmailBackend as TestBackend, TestPayload
@@ -134,7 +133,7 @@ class SendDefaultsTests(TestBackendTestCase):
        'SEND_DEFAULTS': {
            # This isn't an exhaustive list of Anymail message attrs; just one of each type
            'metadata': {'global': 'globalvalue'},
-            'send_at': datetime(2016, 5, 12, 4, 17, 0, tzinfo=utc),
+            'send_at': datetime(2016, 5, 12, 4, 17, 0, tzinfo=timezone.utc),
            'tags': ['globaltag'],
            'template_id': 'my-template',
            'track_clicks': True,
@@ -147,7 +146,7 @@ class SendDefaultsTests(TestBackendTestCase):
        params = self.get_send_params()
        # All these values came from ANYMAIL_SEND_DEFAULTS:
        self.assertEqual(params['metadata'], {'global': 'globalvalue'})
-        self.assertEqual(params['send_at'], datetime(2016, 5, 12, 4, 17, 0, tzinfo=utc))
+        self.assertEqual(params['send_at'], datetime(2016, 5, 12, 4, 17, 0, tzinfo=timezone.utc))
        self.assertEqual(params['tags'], ['globaltag'])
        self.assertEqual(params['template_id'], 'my-template')
        self.assertEqual(params['track_clicks'], True)
--- a/tests/test_mailgun_inbound.py
+++ b/tests/test_mailgun_inbound.py
@@ -1,11 +1,10 @@
 import json
-from datetime import datetime
+from datetime import datetime, timezone
 from io import BytesIO
 from textwrap import dedent
 from unittest.mock import ANY

 from django.test import override_settings, tag
-from django.utils.timezone import utc

 from anymail.exceptions import AnymailConfigurationError
 from anymail.inbound import AnymailInboundMessage
@@ -62,7 +61,7 @@ class MailgunInboundTestCase(WebhookTestCase):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailInboundEvent)
        self.assertEqual(event.event_type, 'inbound')
-        self.assertEqual(event.timestamp, datetime(2016, 4, 21, 17, 55, 30, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2016, 4, 21, 17, 55, 30, tzinfo=timezone.utc))
        self.assertEqual(event.event_id, "06c96bafc3f42a66b9edd546347a2fe18dc23461fe80dc52f0")
        self.assertIsInstance(event.message, AnymailInboundMessage)
        self.assertEqual(querydict_to_postdict(event.esp_event.POST), raw_event)
--- a/tests/test_mailgun_webhooks.py
+++ b/tests/test_mailgun_webhooks.py
@@ -1,12 +1,11 @@
 import json
-from datetime import datetime
+from datetime import datetime, timezone
 from unittest.mock import ANY

 import hashlib
 import hmac
 from django.core.exceptions import ImproperlyConfigured
 from django.test import override_settings, tag
-from django.utils.timezone import utc

 from anymail.exceptions import AnymailConfigurationError
 from anymail.signals import AnymailTrackingEvent
@@ -197,7 +196,7 @@ class MailgunTestCase(WebhookTestCase):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "delivered")
-        self.assertEqual(event.timestamp, datetime(2018, 8, 12, 21, 17, 17, microsecond=153125, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2018, 8, 12, 21, 17, 17, microsecond=153125, tzinfo=timezone.utc))
        self.assertEqual(event.message_id, "<20180812211713.1.DF5966851B4BAA99@example.org>")
        # Note that Anymail uses the "token" as its normalized event_id:
        self.assertEqual(event.event_id, "651869375b9df3c98fc15c4889b102119add1235c38fc92824")
@@ -513,7 +512,7 @@ class MailgunLegacyTestCase(WebhookTestCase):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "delivered")
-        self.assertEqual(event.timestamp, datetime(2016, 4, 21, 17, 55, 30, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2016, 4, 21, 17, 55, 30, tzinfo=timezone.utc))
        self.assertEqual(event.message_id, "<20160421175529.19495.89030.B3AE3728@example.com>")
        self.assertEqual(event.event_id, "06c96bafc3f42a66b9edd546347a2fe18dc23461fe80dc52f0")
        self.assertEqual(event.recipient, "recipient@example.com")
@@ -552,7 +551,7 @@ class MailgunLegacyTestCase(WebhookTestCase):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "rejected")
-        self.assertEqual(event.timestamp, datetime(2016, 4, 21, 17, 55, 30, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2016, 4, 21, 17, 55, 30, tzinfo=timezone.utc))
        self.assertEqual(event.message_id, "<20160421180324.70521.79375.96884DDB@example.com>")
        self.assertEqual(event.event_id, "a3fe1fa1640349ac552b84ddde373014b4c41645830c8dd3fc")
        self.assertEqual(event.recipient, "bounce@example.com")
--- a/tests/test_mailjet_webhooks.py
+++ b/tests/test_mailjet_webhooks.py
@@ -1,9 +1,8 @@
 import json
-from datetime import datetime
+from datetime import datetime, timezone
 from unittest.mock import ANY

 from django.test import tag
-from django.utils.timezone import utc

 from anymail.signals import AnymailTrackingEvent
 from anymail.webhooks.mailjet import MailjetTrackingWebhookView
@@ -44,7 +43,7 @@ class MailjetDeliveryTestCase(WebhookTestCase):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "delivered")
-        self.assertEqual(event.timestamp, datetime(2017, 6, 22, 1, 5, 27, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2017, 6, 22, 1, 5, 27, tzinfo=timezone.utc))
        self.assertEqual(event.esp_event, raw_events[0])
        self.assertEqual(event.mta_response, "sent (250 2.0.0 OK 1498093527 a67bc12345def.22 - gsmtp)")
        self.assertEqual(event.message_id, "12345678901234567")  # converted to str (matching backend status)
@@ -251,7 +250,7 @@ class MailjetDeliveryTestCase(WebhookTestCase):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "delivered")
-        self.assertEqual(event.timestamp, datetime(2017, 6, 22, 1, 5, 27, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2017, 6, 22, 1, 5, 27, tzinfo=timezone.utc))
        self.assertEqual(event.esp_event, raw_event)
        self.assertEqual(event.mta_response, "sent (250 2.0.0 OK 1498093527 a67bc12345def.22 - gsmtp)")
        self.assertEqual(event.message_id, "12345678901234567")  # converted to str (matching backend status)
--- a/tests/test_mandrill_webhooks.py
+++ b/tests/test_mandrill_webhooks.py
@@ -2,13 +2,12 @@ import hashlib
 import hmac
 import json
 from base64 import b64encode
-from datetime import datetime
+from datetime import datetime, timezone
 from unittest.mock import ANY
 from urllib.parse import urljoin

 from django.core.exceptions import ImproperlyConfigured
 from django.test import override_settings, tag
-from django.utils.timezone import utc

 from anymail.signals import AnymailTrackingEvent
 from anymail.webhooks.mandrill import MandrillCombinedWebhookView, MandrillTrackingWebhookView
@@ -166,7 +165,7 @@ class MandrillTrackingTestCase(WebhookTestCase):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "sent")
-        self.assertEqual(event.timestamp, datetime(2016, 4, 19, 19, 47, 26, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2016, 4, 19, 19, 47, 26, tzinfo=timezone.utc))
        self.assertEqual(event.esp_event, raw_events[0])
        self.assertEqual(event.message_id, "abcdef012345789abcdef012345789")
        self.assertEqual(event.recipient, "recipient@example.com")
--- a/tests/test_postal_webhooks.py
+++ b/tests/test_postal_webhooks.py
@@ -1,11 +1,10 @@
 import json
 import unittest
 from base64 import b64encode
-from datetime import datetime
+from datetime import datetime, timezone
 from unittest.mock import ANY

 from django.test import tag
-from django.utils.timezone import utc

 from anymail.exceptions import AnymailConfigurationError
 from anymail.signals import AnymailTrackingEvent
@@ -100,7 +99,7 @@ class PostalDeliveryTestCase(WebhookTestCase):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "bounced")
        self.assertEqual(event.esp_event, raw_event)
-        self.assertEqual(event.timestamp, datetime.fromtimestamp(1606753101, tz=utc))
+        self.assertEqual(event.timestamp, datetime.fromtimestamp(1606753101, tz=timezone.utc))
        self.assertEqual(event.message_id, 233843)
        self.assertEqual(event.event_id, "0fcc831f-92b9-4e2b-97f2-d873abc77fab")
        self.assertEqual(event.recipient, "bounce@example.com")
@@ -145,7 +144,7 @@ class PostalDeliveryTestCase(WebhookTestCase):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "deferred")
        self.assertEqual(event.esp_event, raw_event)
-        self.assertEqual(event.timestamp, datetime.fromtimestamp(1606753101, tz=utc))
+        self.assertEqual(event.timestamp, datetime.fromtimestamp(1606753101, tz=timezone.utc))
        self.assertEqual(event.message_id, 1564)
        self.assertEqual(event.event_id, "0fcc831f-92b9-4e2b-97f2-d873abc77fab")
        self.assertEqual(event.recipient, "deferred@example.com")
@@ -190,7 +189,7 @@ class PostalDeliveryTestCase(WebhookTestCase):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "queued")
        self.assertEqual(event.esp_event, raw_event)
-        self.assertEqual(event.timestamp, datetime.fromtimestamp(1606753101, tz=utc))
+        self.assertEqual(event.timestamp, datetime.fromtimestamp(1606753101, tz=timezone.utc))
        self.assertEqual(event.message_id, 1568)
        self.assertEqual(event.event_id, "9be13015-2e54-456c-bf66-eacbe33da824")
        self.assertEqual(event.recipient, "suppressed@example.com")
@@ -235,7 +234,7 @@ class PostalDeliveryTestCase(WebhookTestCase):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "failed")
        self.assertEqual(event.esp_event, raw_event)
-        self.assertEqual(event.timestamp, datetime.fromtimestamp(1606753101, tz=utc))
+        self.assertEqual(event.timestamp, datetime.fromtimestamp(1606753101, tz=timezone.utc))
        self.assertEqual(event.message_id, 1571)
        self.assertEqual(event.event_id, "5fec5077-dae7-4989-94d5-e1963f3e9181")
        self.assertEqual(event.recipient, "failed@example.com")
@@ -280,7 +279,7 @@ class PostalDeliveryTestCase(WebhookTestCase):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "delivered")
        self.assertEqual(event.esp_event, raw_event)
-        self.assertEqual(event.timestamp, datetime.fromtimestamp(1606753101, tz=utc))
+        self.assertEqual(event.timestamp, datetime.fromtimestamp(1606753101, tz=timezone.utc))
        self.assertEqual(event.message_id, 1563)
        self.assertEqual(event.recipient, "recipient@example.com")
        self.assertEqual(event.tags, ["welcome-email"])
--- a/tests/test_postmark_webhooks.py
+++ b/tests/test_postmark_webhooks.py
@@ -1,9 +1,9 @@
 import json
-from datetime import datetime
+from datetime import datetime, timezone
 from unittest.mock import ANY

 from django.test import tag
-from django.utils.timezone import get_fixed_timezone, utc
+from django.utils.timezone import get_fixed_timezone

 from anymail.exceptions import AnymailConfigurationError
 from anymail.signals import AnymailTrackingEvent
@@ -165,7 +165,7 @@ class PostmarkDeliveryTestCase(WebhookTestCase):
        self.assertEqual(event.event_type, "clicked")
        self.assertEqual(event.esp_event, raw_event)
        self.assertEqual(event.timestamp, datetime(2017, 10, 25, 15, 21, 11, microsecond=906561,
-                                                   tzinfo=utc))
+                                                   tzinfo=timezone.utc))
        self.assertEqual(event.message_id, "f4830d10-9c35-4f0c-bca3-3d9b459821f8")
        self.assertEqual(event.recipient, "recipient@example.com")
        self.assertEqual(event.user_agent, "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) etc.")
@@ -247,7 +247,7 @@ class PostmarkDeliveryTestCase(WebhookTestCase):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "unsubscribed")
        self.assertEqual(event.esp_event, raw_event)
-        self.assertEqual(event.timestamp, datetime(2022, 6, 5, 17, 17, 32, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2022, 6, 5, 17, 17, 32, tzinfo=timezone.utc))
        self.assertEqual(event.message_id, "a4909a96-73d7-4c49-b148-a54522d3f7ac")
        self.assertEqual(event.recipient, "john@example.com",)
        self.assertEqual(event.reject_reason, "unsubscribed")
@@ -278,7 +278,7 @@ class PostmarkDeliveryTestCase(WebhookTestCase):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "subscribed")
        self.assertEqual(event.esp_event, raw_event)
-        self.assertEqual(event.timestamp, datetime(2022, 6, 5, 17, 17, 32, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2022, 6, 5, 17, 17, 32, tzinfo=timezone.utc))
        self.assertEqual(event.message_id, "a4909a96-73d7-4c49-b148-a54522d3f7ac")
        self.assertEqual(event.recipient, "john@example.com",)
        self.assertEqual(event.reject_reason, None)
@@ -309,7 +309,7 @@ class PostmarkDeliveryTestCase(WebhookTestCase):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "bounced")
        self.assertEqual(event.esp_event, raw_event)
-        self.assertEqual(event.timestamp, datetime(2022, 6, 5, 17, 17, 32,  tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2022, 6, 5, 17, 17, 32,  tzinfo=timezone.utc))
        self.assertEqual(event.message_id, "b4cb783d-78ed-43f2-983b-63f55c712dc8")
        self.assertEqual(event.recipient, "john@example.com",)
        self.assertEqual(event.reject_reason, "bounced")
--- a/tests/test_sendgrid_webhooks.py
+++ b/tests/test_sendgrid_webhooks.py
@@ -1,9 +1,8 @@
 import json
-from datetime import datetime
+from datetime import datetime, timezone
 from unittest.mock import ANY

 from django.test import tag
-from django.utils.timezone import utc

 from anymail.signals import AnymailTrackingEvent
 from anymail.webhooks.sendgrid import SendGridTrackingWebhookView
@@ -43,7 +42,7 @@ class SendGridDeliveryTestCase(WebhookTestCase):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "queued")
-        self.assertEqual(event.timestamp, datetime(2016, 4, 19, 19, 47, 26, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2016, 4, 19, 19, 47, 26, tzinfo=timezone.utc))
        self.assertEqual(event.esp_event, raw_events[0])
        self.assertEqual(event.message_id, "3c2f4df8-c6dd-4cd2-9b91-6582b81a0349")
        self.assertEqual(event.event_id, "ZyjAM5rnQmuI1KFInHQ3Nw")
@@ -72,7 +71,7 @@ class SendGridDeliveryTestCase(WebhookTestCase):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "delivered")
-        self.assertEqual(event.timestamp, datetime(2016, 4, 19, 19, 47, 30, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2016, 4, 19, 19, 47, 30, tzinfo=timezone.utc))
        self.assertEqual(event.esp_event, raw_events[0])
        self.assertEqual(event.message_id, "4ab185c2-0171-492f-9ce0-27de258efc99")
        self.assertEqual(event.event_id, "nOSv8m0eTQ-vxvwNwt3fZQ")
--- a/tests/test_sendinblue_webhooks.py
+++ b/tests/test_sendinblue_webhooks.py
@@ -1,9 +1,8 @@
 import json
-from datetime import datetime
+from datetime import datetime, timezone
 from unittest.mock import ANY

 from django.test import tag
-from django.utils.timezone import utc

 from anymail.signals import AnymailTrackingEvent
 from anymail.webhooks.sendinblue import SendinBlueTrackingWebhookView
@@ -60,7 +59,7 @@ class SendinBlueDeliveryTestCase(WebhookTestCase):
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "queued")
        self.assertEqual(event.esp_event, raw_event)
-        self.assertEqual(event.timestamp, datetime(2018, 3, 6, 19, 10, 23, microsecond=0, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2018, 3, 6, 19, 10, 23, microsecond=0, tzinfo=timezone.utc))
        self.assertEqual(event.message_id, "<201803062010.27287306012@smtp-relay.mailin.fr>")
        self.assertIsNone(event.event_id)  # SendinBlue does not provide a unique event id
        self.assertEqual(event.recipient, "recipient@example.com")
--- a/tests/test_sparkpost_backend.py
+++ b/tests/test_sparkpost_backend.py
@@ -1,5 +1,5 @@
 import json
-from datetime import date, datetime
+from datetime import date, datetime, timezone
 from decimal import Decimal
 from email.mime.base import MIMEBase
 from email.mime.image import MIMEImage
@@ -7,7 +7,7 @@ from email.mime.text import MIMEText

 from django.core import mail
 from django.test import override_settings, tag
-from django.utils.timezone import get_fixed_timezone, override as override_current_timezone, utc
+from django.utils.timezone import get_fixed_timezone, override as override_current_timezone

 from anymail.exceptions import (
    AnymailAPIError, AnymailConfigurationError, AnymailRecipientsRefused,
@@ -370,7 +370,7 @@ class SparkPostBackendAnymailFeatureTests(SparkPostBackendMockAPITestCase):
            self.assertEqual(data["options"]["start_time"], "2016-03-04T05:06:07-08:00")

            # Explicit UTC:
-            self.message.send_at = datetime(2016, 3, 4, 5, 6, 7, tzinfo=utc)
+            self.message.send_at = datetime(2016, 3, 4, 5, 6, 7, tzinfo=timezone.utc)
            self.message.send()
            data = self.get_api_call_json()
            self.assertEqual(data["options"]["start_time"], "2016-03-04T05:06:07+00:00")
--- a/tests/test_sparkpost_webhooks.py
+++ b/tests/test_sparkpost_webhooks.py
@@ -1,9 +1,8 @@
 import json
-from datetime import datetime
+from datetime import datetime, timezone
 from unittest.mock import ANY

 from django.test import override_settings, tag
-from django.utils.timezone import utc

 from anymail.signals import AnymailTrackingEvent
 from anymail.webhooks.sparkpost import SparkPostTrackingWebhookView
@@ -73,7 +72,7 @@ class SparkPostDeliveryTestCase(WebhookTestCase):
        event = kwargs['event']
        self.assertIsInstance(event, AnymailTrackingEvent)
        self.assertEqual(event.event_type, "queued")
-        self.assertEqual(event.timestamp, datetime(2016, 2, 2, 19, 50, 00, tzinfo=utc))
+        self.assertEqual(event.timestamp, datetime(2016, 2, 2, 19, 50, 00, tzinfo=timezone.utc))
        self.assertEqual(event.esp_event, raw_events[0])
        self.assertEqual(event.message_id, "65832150921904138")  # actually transmission_id
        self.assertEqual(event.event_id, "92356927693813856")