diff --git a/.azure-pipelines/templates/jobs/extended-tests-jobs.yml b/.azure-pipelines/templates/jobs/extended-tests-jobs.yml
index 7c586ee5b..0f732e6c9 100644
--- a/.azure-pipelines/templates/jobs/extended-tests-jobs.yml
+++ b/.azure-pipelines/templates/jobs/extended-tests-jobs.yml
@@ -18,8 +18,6 @@ jobs:
           PYTHON_VERSION: 3.7
           TOXENV: py37
           CERTBOT_NO_PIN: 1
-        linux-external-mock:
-          TOXENV: external-mock
         linux-boulder-v2-integration-certbot-oldest:
           PYTHON_VERSION: 3.7
           TOXENV: integration-certbot-oldest
diff --git a/certbot-apache/tests/augeasnode_test.py b/certbot-apache/tests/augeasnode_test.py
index 1e11b5eb3..591634d35 100644
--- a/certbot-apache/tests/augeasnode_test.py
+++ b/certbot-apache/tests/augeasnode_test.py
@@ -1,13 +1,9 @@
 """Tests for AugeasParserNode classes"""
 from typing import List
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
-
 import os
 import util
+from unittest import mock
 
 from certbot import errors
 
diff --git a/certbot-apache/tests/autohsts_test.py b/certbot-apache/tests/autohsts_test.py
index 664d791bd..70ed2ca1a 100644
--- a/certbot-apache/tests/autohsts_test.py
+++ b/certbot-apache/tests/autohsts_test.py
@@ -2,11 +2,7 @@
 """Test for certbot_apache._internal.configurator AutoHSTS functionality"""
 import re
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot import errors
 from certbot_apache._internal import constants
diff --git a/certbot-apache/tests/centos_test.py b/certbot-apache/tests/centos_test.py
index c9a820466..cc295266f 100644
--- a/certbot-apache/tests/centos_test.py
+++ b/certbot-apache/tests/centos_test.py
@@ -1,10 +1,6 @@
 """Test for certbot_apache._internal.configurator for Centos overrides"""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import filesystem
diff --git a/certbot-apache/tests/configurator_reverter_test.py b/certbot-apache/tests/configurator_reverter_test.py
index 72b8fe2bd..fe0dfb39d 100644
--- a/certbot-apache/tests/configurator_reverter_test.py
+++ b/certbot-apache/tests/configurator_reverter_test.py
@@ -1,11 +1,7 @@
 """Test for certbot_apache._internal.configurator implementations of reverter"""
 import shutil
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot import errors
 import util
diff --git a/certbot-apache/tests/configurator_test.py b/certbot-apache/tests/configurator_test.py
index 566907506..0978b302e 100644
--- a/certbot-apache/tests/configurator_test.py
+++ b/certbot-apache/tests/configurator_test.py
@@ -5,11 +5,7 @@ import shutil
 import socket
 import tempfile
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from acme import challenges
 from certbot import achallenges
diff --git a/certbot-apache/tests/debian_test.py b/certbot-apache/tests/debian_test.py
index 2bbf40312..facc65107 100644
--- a/certbot-apache/tests/debian_test.py
+++ b/certbot-apache/tests/debian_test.py
@@ -1,11 +1,7 @@
 """Test for certbot_apache._internal.configurator for Debian overrides"""
 import shutil
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import os
diff --git a/certbot-apache/tests/display_ops_test.py b/certbot-apache/tests/display_ops_test.py
index 50ab6bfc7..26927ffad 100644
--- a/certbot-apache/tests/display_ops_test.py
+++ b/certbot-apache/tests/display_ops_test.py
@@ -1,10 +1,6 @@
 """Test certbot_apache._internal.display_ops."""
 import unittest
-
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock  # type: ignore
+from unittest import mock
 
 from certbot import errors
 from certbot.display import util as display_util
diff --git a/certbot-apache/tests/dualnode_test.py b/certbot-apache/tests/dualnode_test.py
index 83a5729a5..a3e28d09e 100644
--- a/certbot-apache/tests/dualnode_test.py
+++ b/certbot-apache/tests/dualnode_test.py
@@ -1,10 +1,6 @@
 """Tests for DualParserNode implementation"""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot_apache._internal import assertions
 from certbot_apache._internal import augeasparser
diff --git a/certbot-apache/tests/entrypoint_test.py b/certbot-apache/tests/entrypoint_test.py
index 2a2694415..0b9644f09 100644
--- a/certbot-apache/tests/entrypoint_test.py
+++ b/certbot-apache/tests/entrypoint_test.py
@@ -1,10 +1,6 @@
 """Test for certbot_apache._internal.entrypoint for override class resolution"""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot_apache._internal import configurator
 from certbot_apache._internal import entrypoint
diff --git a/certbot-apache/tests/fedora_test.py b/certbot-apache/tests/fedora_test.py
index fca3c4ba4..4ff704aaf 100644
--- a/certbot-apache/tests/fedora_test.py
+++ b/certbot-apache/tests/fedora_test.py
@@ -1,10 +1,6 @@
 """Test for certbot_apache._internal.configurator for Fedora 29+ overrides"""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import filesystem
diff --git a/certbot-apache/tests/gentoo_test.py b/certbot-apache/tests/gentoo_test.py
index 25f9e929b..4df46e70f 100644
--- a/certbot-apache/tests/gentoo_test.py
+++ b/certbot-apache/tests/gentoo_test.py
@@ -1,10 +1,6 @@
 """Test for certbot_apache._internal.configurator for Gentoo overrides"""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import filesystem
diff --git a/certbot-apache/tests/http_01_test.py b/certbot-apache/tests/http_01_test.py
index 65dfb6344..fe5b69b33 100644
--- a/certbot-apache/tests/http_01_test.py
+++ b/certbot-apache/tests/http_01_test.py
@@ -2,11 +2,7 @@
 import unittest
 import errno
 from typing import List
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from acme import challenges
 from certbot import achallenges
diff --git a/certbot-apache/tests/parser_test.py b/certbot-apache/tests/parser_test.py
index 31a769ddd..89633ae47 100644
--- a/certbot-apache/tests/parser_test.py
+++ b/certbot-apache/tests/parser_test.py
@@ -1,11 +1,7 @@
 """Tests for certbot_apache._internal.parser."""
 import shutil
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import os
diff --git a/certbot-apache/tests/parsernode_configurator_test.py b/certbot-apache/tests/parsernode_configurator_test.py
index ebeda3c37..6c153acc4 100644
--- a/certbot-apache/tests/parsernode_configurator_test.py
+++ b/certbot-apache/tests/parsernode_configurator_test.py
@@ -1,10 +1,6 @@
 """Tests for ApacheConfigurator for AugeasParserNode classes"""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 import util
 
diff --git a/certbot-apache/tests/util.py b/certbot-apache/tests/util.py
index a4191b3fe..cf97d9e7a 100644
--- a/certbot-apache/tests/util.py
+++ b/certbot-apache/tests/util.py
@@ -4,11 +4,7 @@ import unittest
 
 import augeas
 import josepy as jose
-
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock  # type: ignore
+from unittest import mock
 
 from certbot.compat import os
 from certbot.plugins import common
diff --git a/certbot-dns-cloudflare/tests/dns_cloudflare_test.py b/certbot-dns-cloudflare/tests/dns_cloudflare_test.py
index 2b1827831..cd73adc8f 100644
--- a/certbot-dns-cloudflare/tests/dns_cloudflare_test.py
+++ b/certbot-dns-cloudflare/tests/dns_cloudflare_test.py
@@ -1,12 +1,9 @@
 """Tests for certbot_dns_cloudflare._internal.dns_cloudflare."""
 
 import unittest
+from unittest import mock
 
 import CloudFlare
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 
 from certbot import errors
 from certbot.compat import os
diff --git a/certbot-dns-digitalocean/tests/dns_digitalocean_test.py b/certbot-dns-digitalocean/tests/dns_digitalocean_test.py
index 4683893e8..8fdee38f3 100644
--- a/certbot-dns-digitalocean/tests/dns_digitalocean_test.py
+++ b/certbot-dns-digitalocean/tests/dns_digitalocean_test.py
@@ -1,12 +1,9 @@
 """Tests for certbot_dns_digitalocean._internal.dns_digitalocean."""
 
 import unittest
+from unittest import mock
 
 import digitalocean
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 
 from certbot import errors
 from certbot.compat import os
diff --git a/certbot-dns-dnsimple/tests/dns_dnsimple_test.py b/certbot-dns-dnsimple/tests/dns_dnsimple_test.py
index fc3dc5b1f..0e28f43b2 100644
--- a/certbot-dns-dnsimple/tests/dns_dnsimple_test.py
+++ b/certbot-dns-dnsimple/tests/dns_dnsimple_test.py
@@ -1,11 +1,8 @@
 """Tests for certbot_dns_dnsimple._internal.dns_dnsimple."""
 
 import unittest
+from unittest import mock
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 from requests.exceptions import HTTPError
 
 from certbot.compat import os
diff --git a/certbot-dns-dnsmadeeasy/tests/dns_dnsmadeeasy_test.py b/certbot-dns-dnsmadeeasy/tests/dns_dnsmadeeasy_test.py
index a04716d95..46f5895a8 100644
--- a/certbot-dns-dnsmadeeasy/tests/dns_dnsmadeeasy_test.py
+++ b/certbot-dns-dnsmadeeasy/tests/dns_dnsmadeeasy_test.py
@@ -1,11 +1,8 @@
 """Tests for certbot_dns_dnsmadeeasy._internal.dns_dnsmadeeasy."""
 
 import unittest
+from unittest import mock
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 from requests.exceptions import HTTPError
 
 from certbot.compat import os
diff --git a/certbot-dns-gehirn/tests/dns_gehirn_test.py b/certbot-dns-gehirn/tests/dns_gehirn_test.py
index 1310f74ca..b982e3e1b 100644
--- a/certbot-dns-gehirn/tests/dns_gehirn_test.py
+++ b/certbot-dns-gehirn/tests/dns_gehirn_test.py
@@ -1,11 +1,8 @@
 """Tests for certbot_dns_gehirn._internal.dns_gehirn."""
 
 import unittest
+from unittest import mock
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 from requests.exceptions import HTTPError
 
 from certbot.compat import os
diff --git a/certbot-dns-google/tests/dns_google_test.py b/certbot-dns-google/tests/dns_google_test.py
index b6f63a937..27e8b1a65 100644
--- a/certbot-dns-google/tests/dns_google_test.py
+++ b/certbot-dns-google/tests/dns_google_test.py
@@ -6,10 +6,8 @@ from googleapiclient import discovery
 from googleapiclient.errors import Error
 from googleapiclient.http import HttpMock
 from httplib2 import ServerNotFoundError
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import os
diff --git a/certbot-dns-linode/tests/dns_linode_test.py b/certbot-dns-linode/tests/dns_linode_test.py
index d0d6ceb03..c227ef4b5 100644
--- a/certbot-dns-linode/tests/dns_linode_test.py
+++ b/certbot-dns-linode/tests/dns_linode_test.py
@@ -1,11 +1,7 @@
 """Tests for certbot_dns_linode._internal.dns_linode."""
 
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import os
diff --git a/certbot-dns-luadns/tests/dns_luadns_test.py b/certbot-dns-luadns/tests/dns_luadns_test.py
index 7592e2323..3c1ac6841 100644
--- a/certbot-dns-luadns/tests/dns_luadns_test.py
+++ b/certbot-dns-luadns/tests/dns_luadns_test.py
@@ -1,11 +1,8 @@
 """Tests for certbot_dns_luadns._internal.dns_luadns."""
 
 import unittest
+from unittest import mock
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 from requests.exceptions import HTTPError
 
 from certbot.compat import os
diff --git a/certbot-dns-nsone/tests/dns_nsone_test.py b/certbot-dns-nsone/tests/dns_nsone_test.py
index 3754f9811..13ea09b3d 100644
--- a/certbot-dns-nsone/tests/dns_nsone_test.py
+++ b/certbot-dns-nsone/tests/dns_nsone_test.py
@@ -1,11 +1,8 @@
 """Tests for certbot_dns_nsone._internal.dns_nsone."""
 
 import unittest
+from unittest import mock
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 from requests.exceptions import HTTPError
 
 from certbot.compat import os
diff --git a/certbot-dns-ovh/tests/dns_ovh_test.py b/certbot-dns-ovh/tests/dns_ovh_test.py
index 7f93967eb..7eb767b70 100644
--- a/certbot-dns-ovh/tests/dns_ovh_test.py
+++ b/certbot-dns-ovh/tests/dns_ovh_test.py
@@ -1,11 +1,8 @@
 """Tests for certbot_dns_ovh._internal.dns_ovh."""
 
 import unittest
+from unittest import mock
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 from requests.exceptions import HTTPError
 
 from certbot.compat import os
diff --git a/certbot-dns-rfc2136/tests/dns_rfc2136_test.py b/certbot-dns-rfc2136/tests/dns_rfc2136_test.py
index d0434aef5..1f91d3cb6 100644
--- a/certbot-dns-rfc2136/tests/dns_rfc2136_test.py
+++ b/certbot-dns-rfc2136/tests/dns_rfc2136_test.py
@@ -1,14 +1,11 @@
 """Tests for certbot_dns_rfc2136._internal.dns_rfc2136."""
 
 import unittest
+from unittest import mock
 
 import dns.flags
 import dns.rcode
 import dns.tsig
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 
 from certbot import errors
 from certbot.compat import os
diff --git a/certbot-dns-route53/tests/dns_route53_test.py b/certbot-dns-route53/tests/dns_route53_test.py
index 69b6b115d..bdc70e048 100644
--- a/certbot-dns-route53/tests/dns_route53_test.py
+++ b/certbot-dns-route53/tests/dns_route53_test.py
@@ -1,13 +1,10 @@
 """Tests for certbot_dns_route53._internal.dns_route53.Authenticator"""
 
 import unittest
+from unittest import mock
 
 from botocore.exceptions import ClientError
 from botocore.exceptions import NoCredentialsError
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 
 from certbot import errors
 from certbot.compat import os
diff --git a/certbot-dns-sakuracloud/tests/dns_sakuracloud_test.py b/certbot-dns-sakuracloud/tests/dns_sakuracloud_test.py
index 1c64df372..a1abf7b78 100644
--- a/certbot-dns-sakuracloud/tests/dns_sakuracloud_test.py
+++ b/certbot-dns-sakuracloud/tests/dns_sakuracloud_test.py
@@ -1,11 +1,8 @@
 """Tests for certbot_dns_sakuracloud._internal.dns_sakuracloud."""
 
 import unittest
+from unittest import mock
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 from requests.exceptions import HTTPError
 
 from certbot.compat import os
diff --git a/certbot-nginx/tests/configurator_test.py b/certbot-nginx/tests/configurator_test.py
index a182f789a..916dfe3f5 100644
--- a/certbot-nginx/tests/configurator_test.py
+++ b/certbot-nginx/tests/configurator_test.py
@@ -1,10 +1,7 @@
 """Test for certbot_nginx._internal.configurator."""
 import unittest
+from unittest import mock
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 import OpenSSL
 
 from acme import challenges
diff --git a/certbot-nginx/tests/http_01_test.py b/certbot-nginx/tests/http_01_test.py
index b9917af35..05be06202 100644
--- a/certbot-nginx/tests/http_01_test.py
+++ b/certbot-nginx/tests/http_01_test.py
@@ -1,11 +1,8 @@
 """Tests for certbot_nginx._internal.http_01"""
 import unittest
+from unittest import mock
 
 import josepy as jose
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
 
 from acme import challenges
 from certbot import achallenges
diff --git a/certbot-nginx/tests/parser_obj_test.py b/certbot-nginx/tests/parser_obj_test.py
index 4d1f25277..60ff1c975 100644
--- a/certbot-nginx/tests/parser_obj_test.py
+++ b/certbot-nginx/tests/parser_obj_test.py
@@ -1,11 +1,7 @@
 """ Tests for functions and classes in parser_obj.py """
 
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock # type: ignore
+from unittest import mock
 
 from certbot_nginx._internal.parser_obj import COMMENT_BLOCK
 from certbot_nginx._internal.parser_obj import parse_raw
diff --git a/certbot-nginx/tests/test_util.py b/certbot-nginx/tests/test_util.py
index 6cc701f42..1ac649318 100644
--- a/certbot-nginx/tests/test_util.py
+++ b/certbot-nginx/tests/test_util.py
@@ -4,10 +4,7 @@ import shutil
 import tempfile
 
 import josepy as jose
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock  # type: ignore
+from unittest import mock
 import pkg_resources
 
 from certbot import util
diff --git a/certbot/certbot/plugins/dns_test_common.py b/certbot/certbot/plugins/dns_test_common.py
index a2ab84dcb..65c9cc2c8 100644
--- a/certbot/certbot/plugins/dns_test_common.py
+++ b/certbot/certbot/plugins/dns_test_common.py
@@ -5,6 +5,7 @@ from typing import TYPE_CHECKING
 
 import configobj
 import josepy as jose
+from unittest import mock
 
 from acme import challenges
 from certbot import achallenges
@@ -19,12 +20,6 @@ else:
     Protocol = object
 
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock  # type: ignore
-
-
 DOMAIN = 'example.com'
 KEY = jose.JWKRSA.load(test_util.load_vector("rsa512_key.pem"))
 
diff --git a/certbot/certbot/plugins/dns_test_common_lexicon.py b/certbot/certbot/plugins/dns_test_common_lexicon.py
index 01f4c6d61..371040404 100644
--- a/certbot/certbot/plugins/dns_test_common_lexicon.py
+++ b/certbot/certbot/plugins/dns_test_common_lexicon.py
@@ -1,6 +1,7 @@
 """Base test class for DNS authenticators built on Lexicon."""
 from typing import Any
 from typing import TYPE_CHECKING
+from unittest import mock
 from unittest.mock import MagicMock
 
 import josepy as jose
@@ -14,10 +15,6 @@ from certbot.plugins.dns_common_lexicon import LexiconClient
 from certbot.plugins.dns_test_common import _AuthenticatorCallableTestCase
 from certbot.tests import util as test_util
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock  # type: ignore
 if TYPE_CHECKING:
     from typing_extensions import Protocol
 else:
diff --git a/certbot/certbot/tests/util.py b/certbot/certbot/tests/util.py
index e758fd9d1..3509f360f 100644
--- a/certbot/certbot/tests/util.py
+++ b/certbot/certbot/tests/util.py
@@ -16,7 +16,7 @@ from typing import Iterable
 from typing import List
 from typing import Optional
 import unittest
-import warnings
+from unittest import mock
 
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives import serialization
@@ -35,20 +35,6 @@ from certbot.compat import os
 from certbot.display import util as display_util
 from certbot.plugins import common
 
-try:
-    # When we remove this deprecated import, we should also remove the
-    # "external-mock" test environment and the mock dependency listed in
-    # tools/pinning/pyproject.toml.
-    import mock
-    warnings.warn(
-        "The external mock module is being used for backwards compatibility "
-        "since it is available, however, future versions of Certbot's tests will "
-        "use unittest.mock. Be sure to update your code accordingly.",
-        PendingDeprecationWarning
-    )
-except ImportError:  # pragma: no cover
-    from unittest import mock  # type: ignore
-
 
 class DummyInstaller(common.Installer):
     """Dummy installer plugin for test purpose."""
diff --git a/certbot/setup.py b/certbot/setup.py
index 600087d7f..8ea0b0e6f 100644
--- a/certbot/setup.py
+++ b/certbot/setup.py
@@ -90,7 +90,6 @@ test_extras = [
     'pytest-xdist',
     'setuptools',
     'tox',
-    'types-mock',
     'types-pyOpenSSL',
     'types-pyRFC3339',
     'types-pytz',
diff --git a/certbot/tests/account_test.py b/certbot/tests/account_test.py
index e034c5f32..0037de31e 100644
--- a/certbot/tests/account_test.py
+++ b/certbot/tests/account_test.py
@@ -4,10 +4,7 @@ import json
 import unittest
 
 import josepy as jose
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 import pytz
 
 from acme import messages
diff --git a/certbot/tests/auth_handler_test.py b/certbot/tests/auth_handler_test.py
index ba0323c3e..23d5b2ae2 100644
--- a/certbot/tests/auth_handler_test.py
+++ b/certbot/tests/auth_handler_test.py
@@ -4,10 +4,7 @@ import logging
 import unittest
 
 from josepy import b64encode
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from acme import challenges
 from acme import client as acme_client
diff --git a/certbot/tests/cert_manager_test.py b/certbot/tests/cert_manager_test.py
index 0ed09eccd..157d45b55 100644
--- a/certbot/tests/cert_manager_test.py
+++ b/certbot/tests/cert_manager_test.py
@@ -7,10 +7,7 @@ import tempfile
 import unittest
 
 import configobj
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot import errors, configuration
 from certbot._internal.storage import ALL_FOUR
diff --git a/certbot/tests/cli_test.py b/certbot/tests/cli_test.py
index 82138f52d..54abe2594 100644
--- a/certbot/tests/cli_test.py
+++ b/certbot/tests/cli_test.py
@@ -5,6 +5,7 @@ from importlib import reload as reload_module
 import io
 import tempfile
 import unittest
+from unittest import mock
 
 from acme import challenges
 from certbot import errors
@@ -16,11 +17,6 @@ from certbot.compat import os
 import certbot.tests.util as test_util
 from certbot.tests.util import TempDirTestCase
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
-
 
 PLUGINS = disco.PluginsRegistry.find_all()
 
diff --git a/certbot/tests/client_test.py b/certbot/tests/client_test.py
index 70f46aee7..6b430831f 100644
--- a/certbot/tests/client_test.py
+++ b/certbot/tests/client_test.py
@@ -5,6 +5,7 @@ import platform
 import shutil
 import tempfile
 import unittest
+from unittest import mock
 from unittest.mock import MagicMock
 
 from josepy import interfaces
@@ -17,11 +18,6 @@ from certbot._internal import constants
 from certbot.compat import os
 import certbot.tests.util as test_util
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock
-
 
 KEY = test_util.load_vector("rsa512_key.pem")
 CSR_SAN = test_util.load_vector("csr-san_512.pem")
diff --git a/certbot/tests/compat/filesystem_test.py b/certbot/tests/compat/filesystem_test.py
index 9aab49c34..a9a258ba2 100644
--- a/certbot/tests/compat/filesystem_test.py
+++ b/certbot/tests/compat/filesystem_test.py
@@ -2,11 +2,7 @@
 import contextlib
 import errno
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot import util
 from certbot._internal import lock
diff --git a/certbot/tests/compat/misc_test.py b/certbot/tests/compat/misc_test.py
index 2155bd5a0..5cb8167b6 100644
--- a/certbot/tests/compat/misc_test.py
+++ b/certbot/tests/compat/misc_test.py
@@ -1,10 +1,6 @@
 """Tests for certbot.compat.misc"""
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock  # type: ignore
 import unittest
-import warnings
+from unittest import mock
 
 from certbot.compat import os
 
diff --git a/certbot/tests/configuration_test.py b/certbot/tests/configuration_test.py
index 1c122615b..61c902bc9 100644
--- a/certbot/tests/configuration_test.py
+++ b/certbot/tests/configuration_test.py
@@ -1,10 +1,6 @@
 """Tests for certbot.configuration."""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot import errors
 from certbot._internal import constants
diff --git a/certbot/tests/crypto_util_test.py b/certbot/tests/crypto_util_test.py
index 9a111a0eb..3031cf531 100644
--- a/certbot/tests/crypto_util_test.py
+++ b/certbot/tests/crypto_util_test.py
@@ -1,11 +1,8 @@
 """Tests for certbot.crypto_util."""
 import logging
 import unittest
+from unittest import mock
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock
 import OpenSSL
 
 from certbot import errors
diff --git a/certbot/tests/display/completer_test.py b/certbot/tests/display/completer_test.py
index a6ada8b9a..73722151a 100644
--- a/certbot/tests/display/completer_test.py
+++ b/certbot/tests/display/completer_test.py
@@ -9,17 +9,12 @@ from importlib import reload as reload_module
 import string
 import sys
 import unittest
+from unittest import mock
 
 from certbot.compat import filesystem
 from certbot.compat import os
 import certbot.tests.util as test_util
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
-
-
 
 class CompleterTest(test_util.TempDirTestCase):
     """Test certbot._internal.display.completer.Completer."""
diff --git a/certbot/tests/display/internal_util_test.py b/certbot/tests/display/internal_util_test.py
index 86489b6a5..b29396c41 100644
--- a/certbot/tests/display/internal_util_test.py
+++ b/certbot/tests/display/internal_util_test.py
@@ -3,15 +3,11 @@ import io
 import socket
 import tempfile
 import unittest
+from unittest import mock
 
 from acme import messages as acme_messages
 from certbot import errors
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock
-
 
 class WrapLinesTest(unittest.TestCase):
     def test_wrap_lines(self):
diff --git a/certbot/tests/display/ops_test.py b/certbot/tests/display/ops_test.py
index e00eeb086..1235190a7 100644
--- a/certbot/tests/display/ops_test.py
+++ b/certbot/tests/display/ops_test.py
@@ -2,6 +2,7 @@
 """Test certbot.display.ops."""
 import sys
 import unittest
+from unittest import mock
 
 import josepy as jose
 
@@ -15,11 +16,6 @@ from certbot.display import ops
 from certbot.display import util as display_util
 import certbot.tests.util as test_util
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock
-
 
 KEY = jose.JWKRSA.load(test_util.load_vector("rsa512_key.pem"))
 
diff --git a/certbot/tests/display/util_test.py b/certbot/tests/display/util_test.py
index 7985de753..7eb45653c 100644
--- a/certbot/tests/display/util_test.py
+++ b/certbot/tests/display/util_test.py
@@ -3,15 +3,11 @@ import io
 import socket
 import tempfile
 import unittest
+from unittest import mock
 
 from certbot import errors
 import certbot.tests.util as test_util
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock
-
 
 class NotifyTest(unittest.TestCase):
     """Tests for certbot.display.util.notify"""
diff --git a/certbot/tests/eff_test.py b/certbot/tests/eff_test.py
index c61f183cb..6a8ac2c61 100644
--- a/certbot/tests/eff_test.py
+++ b/certbot/tests/eff_test.py
@@ -1,11 +1,8 @@
 """Tests for certbot._internal.eff."""
 import datetime
 import unittest
+from unittest import mock
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock
 import josepy
 import pytz
 import requests
diff --git a/certbot/tests/error_handler_test.py b/certbot/tests/error_handler_test.py
index 010a756c1..d6d506956 100644
--- a/certbot/tests/error_handler_test.py
+++ b/certbot/tests/error_handler_test.py
@@ -6,15 +6,10 @@ from typing import Callable
 from typing import Dict
 from typing import Union
 import unittest
+from unittest import mock
 
 from certbot.compat import os
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
-
-
 
 def get_signals(signums):
     """Get the handlers for an iterable of signums."""
diff --git a/certbot/tests/errors_test.py b/certbot/tests/errors_test.py
index 792868df0..d05f2b43e 100644
--- a/certbot/tests/errors_test.py
+++ b/certbot/tests/errors_test.py
@@ -1,10 +1,6 @@
 """Tests for certbot.errors."""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from acme import messages
 from certbot import achallenges
diff --git a/certbot/tests/helpful_test.py b/certbot/tests/helpful_test.py
index 0abe277bf..c67211a43 100644
--- a/certbot/tests/helpful_test.py
+++ b/certbot/tests/helpful_test.py
@@ -1,10 +1,6 @@
 """Tests for certbot.helpful_parser"""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot import errors
 from certbot._internal.cli import HelpfulArgumentParser
diff --git a/certbot/tests/hook_test.py b/certbot/tests/hook_test.py
index fad18dc9f..8cd8e6631 100644
--- a/certbot/tests/hook_test.py
+++ b/certbot/tests/hook_test.py
@@ -1,10 +1,6 @@
 """Tests for certbot._internal.hooks."""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot import errors
 from certbot import util
diff --git a/certbot/tests/lock_test.py b/certbot/tests/lock_test.py
index b45eb8f7a..1e7525782 100644
--- a/certbot/tests/lock_test.py
+++ b/certbot/tests/lock_test.py
@@ -2,11 +2,7 @@
 import functools
 import multiprocessing
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import os
diff --git a/certbot/tests/log_test.py b/certbot/tests/log_test.py
index aec3ac65a..855582591 100644
--- a/certbot/tests/log_test.py
+++ b/certbot/tests/log_test.py
@@ -6,6 +6,7 @@ import sys
 import time
 from typing import Optional
 import unittest
+from unittest import mock
 
 from acme import messages
 from certbot import errors
@@ -15,11 +16,6 @@ from certbot.compat import filesystem
 from certbot.compat import os
 from certbot.tests import util as test_util
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
-
 
 
 class PreArgParseSetupTest(unittest.TestCase):
diff --git a/certbot/tests/main_test.py b/certbot/tests/main_test.py
index bec13a19d..3374f35b3 100644
--- a/certbot/tests/main_test.py
+++ b/certbot/tests/main_test.py
@@ -12,6 +12,7 @@ import tempfile
 import traceback
 from typing import List
 import unittest
+from unittest import mock
 
 import josepy as jose
 import pytz
@@ -34,11 +35,6 @@ from certbot.compat import os
 from certbot.plugins import enhancements
 import certbot.tests.util as test_util
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
-
 
 
 CERT_PATH = test_util.vector_path('cert_512.pem')
diff --git a/certbot/tests/ocsp_test.py b/certbot/tests/ocsp_test.py
index c102667bc..802787e02 100644
--- a/certbot/tests/ocsp_test.py
+++ b/certbot/tests/ocsp_test.py
@@ -4,6 +4,7 @@ import contextlib
 from datetime import datetime
 from datetime import timedelta
 import unittest
+from unittest import mock
 
 from cryptography import x509
 from cryptography.exceptions import InvalidSignature
@@ -16,11 +17,6 @@ import pytz
 from certbot import errors
 from certbot.tests import util as test_util
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
-
 
 out = """Missing = in header key=value
 ocsp: Use -help for summary.
diff --git a/certbot/tests/plugins/common_test.py b/certbot/tests/plugins/common_test.py
index 46d766bcf..215faaea3 100644
--- a/certbot/tests/plugins/common_test.py
+++ b/certbot/tests/plugins/common_test.py
@@ -2,12 +2,9 @@
 import functools
 import shutil
 import unittest
+from unittest import mock
 
 import josepy as jose
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
 
 from acme import challenges
 from certbot import achallenges
diff --git a/certbot/tests/plugins/disco_test.py b/certbot/tests/plugins/disco_test.py
index 6b599f561..c564cebce 100644
--- a/certbot/tests/plugins/disco_test.py
+++ b/certbot/tests/plugins/disco_test.py
@@ -3,6 +3,7 @@ import functools
 import string
 from typing import List
 import unittest
+from unittest import mock
 
 import pkg_resources
 
@@ -12,11 +13,6 @@ from certbot._internal.plugins import null
 from certbot._internal.plugins import standalone
 from certbot._internal.plugins import webroot
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock
-
 
 EP_SA = pkg_resources.EntryPoint(
     "sa", "certbot._internal.plugins.standalone",
diff --git a/certbot/tests/plugins/dns_common_lexicon_test.py b/certbot/tests/plugins/dns_common_lexicon_test.py
index 40afd107b..4634c2057 100644
--- a/certbot/tests/plugins/dns_common_lexicon_test.py
+++ b/certbot/tests/plugins/dns_common_lexicon_test.py
@@ -1,11 +1,7 @@
 """Tests for certbot.plugins.dns_common_lexicon."""
 
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot.plugins import dns_common_lexicon
 from certbot.plugins import dns_test_common_lexicon
diff --git a/certbot/tests/plugins/dns_common_test.py b/certbot/tests/plugins/dns_common_test.py
index f68d36137..97bc5dea6 100644
--- a/certbot/tests/plugins/dns_common_test.py
+++ b/certbot/tests/plugins/dns_common_test.py
@@ -3,11 +3,7 @@
 import collections
 import logging
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot import errors
 from certbot import util
diff --git a/certbot/tests/plugins/enhancements_test.py b/certbot/tests/plugins/enhancements_test.py
index 62289d95b..903d3e095 100644
--- a/certbot/tests/plugins/enhancements_test.py
+++ b/certbot/tests/plugins/enhancements_test.py
@@ -1,10 +1,6 @@
 """Tests for new style enhancements"""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot._internal.plugins import null
 from certbot.plugins import enhancements
diff --git a/certbot/tests/plugins/manual_test.py b/certbot/tests/plugins/manual_test.py
index cfe2f60fa..a5dc69c32 100644
--- a/certbot/tests/plugins/manual_test.py
+++ b/certbot/tests/plugins/manual_test.py
@@ -2,11 +2,7 @@
 import sys
 import textwrap
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from acme import challenges
 from certbot import errors
diff --git a/certbot/tests/plugins/null_test.py b/certbot/tests/plugins/null_test.py
index dfdd0a7de..ce3440e5b 100644
--- a/certbot/tests/plugins/null_test.py
+++ b/certbot/tests/plugins/null_test.py
@@ -1,10 +1,6 @@
 """Tests for certbot._internal.plugins.null."""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 
 class InstallerTest(unittest.TestCase):
diff --git a/certbot/tests/plugins/selection_test.py b/certbot/tests/plugins/selection_test.py
index b2f387542..6aed9ec8d 100644
--- a/certbot/tests/plugins/selection_test.py
+++ b/certbot/tests/plugins/selection_test.py
@@ -2,7 +2,7 @@
 import sys
 from typing import List
 import unittest
-
+from unittest import mock
 
 from certbot import errors
 from certbot import interfaces
@@ -11,11 +11,6 @@ from certbot._internal.plugins.disco import PluginsRegistry
 from certbot.display import util as display_util
 from certbot.tests import util as test_util
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock
-
 
 class ConveniencePickPluginTest(unittest.TestCase):
     """Tests for certbot._internal.plugins.selection.pick_*."""
diff --git a/certbot/tests/plugins/standalone_test.py b/certbot/tests/plugins/standalone_test.py
index 2649abae9..39454570e 100644
--- a/certbot/tests/plugins/standalone_test.py
+++ b/certbot/tests/plugins/standalone_test.py
@@ -5,6 +5,7 @@ from typing import Dict
 from typing import Set
 from typing import Tuple
 import unittest
+from unittest import mock
 
 import josepy as jose
 import OpenSSL.crypto
@@ -16,11 +17,6 @@ from certbot import errors
 from certbot.tests import acme_util
 from certbot.tests import util as test_util
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
-
 
 class ServerManagerTest(unittest.TestCase):
     """Tests for certbot._internal.plugins.standalone.ServerManager."""
diff --git a/certbot/tests/plugins/storage_test.py b/certbot/tests/plugins/storage_test.py
index 66034b09e..a63ef7795 100644
--- a/certbot/tests/plugins/storage_test.py
+++ b/certbot/tests/plugins/storage_test.py
@@ -4,17 +4,13 @@ from typing import Iterable
 from typing import List
 from typing import Optional
 import unittest
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import filesystem
 from certbot.compat import os
 from certbot.tests import util as test_util
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
-
 
 
 class PluginStorageTest(test_util.ConfigTestCase):
diff --git a/certbot/tests/plugins/util_test.py b/certbot/tests/plugins/util_test.py
index 1b4fcd652..faac01165 100644
--- a/certbot/tests/plugins/util_test.py
+++ b/certbot/tests/plugins/util_test.py
@@ -1,10 +1,6 @@
 """Tests for certbot.plugins.util."""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot.compat import os
 
diff --git a/certbot/tests/plugins/webroot_test.py b/certbot/tests/plugins/webroot_test.py
index d7e961596..d5ccc4b4f 100644
--- a/certbot/tests/plugins/webroot_test.py
+++ b/certbot/tests/plugins/webroot_test.py
@@ -8,12 +8,9 @@ import json
 import shutil
 import tempfile
 import unittest
+from unittest import mock
 
 import josepy as jose
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
 
 from acme import challenges
 from certbot import achallenges
diff --git a/certbot/tests/renewal_test.py b/certbot/tests/renewal_test.py
index 10631c1c6..ce6065091 100644
--- a/certbot/tests/renewal_test.py
+++ b/certbot/tests/renewal_test.py
@@ -1,18 +1,13 @@
 """Tests for certbot._internal.renewal"""
 import copy
 import unittest
+from unittest import mock
 
 from acme import challenges
 from certbot import errors, configuration
 from certbot._internal import storage
 import certbot.tests.util as test_util
 
-try:
-    import mock
-except ImportError:  # pragma: no cover
-    from unittest import mock
-
-
 
 class RenewalTest(test_util.ConfigTestCase):
     @mock.patch('certbot._internal.cli.set_by_cli')
diff --git a/certbot/tests/renewupdater_test.py b/certbot/tests/renewupdater_test.py
index f086e3cf3..30a7b0f46 100644
--- a/certbot/tests/renewupdater_test.py
+++ b/certbot/tests/renewupdater_test.py
@@ -1,10 +1,6 @@
 """Tests for renewal updater interfaces"""
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot import interfaces
 from certbot._internal import main
diff --git a/certbot/tests/reverter_test.py b/certbot/tests/reverter_test.py
index e8d85d4d1..5124c7d9f 100644
--- a/certbot/tests/reverter_test.py
+++ b/certbot/tests/reverter_test.py
@@ -4,11 +4,7 @@ import logging
 import shutil
 import tempfile
 import unittest
-
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import os
diff --git a/certbot/tests/storage_test.py b/certbot/tests/storage_test.py
index c4e42ec37..3a1f2b7b4 100644
--- a/certbot/tests/storage_test.py
+++ b/certbot/tests/storage_test.py
@@ -4,12 +4,9 @@ import datetime
 import shutil
 import stat
 import unittest
+from unittest import mock
 
 import configobj
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
 import pytz
 
 import certbot
diff --git a/certbot/tests/util_test.py b/certbot/tests/util_test.py
index 0da0976b8..e9b5ddef2 100644
--- a/certbot/tests/util_test.py
+++ b/certbot/tests/util_test.py
@@ -5,18 +5,13 @@ from importlib import reload as reload_module
 import io
 import sys
 import unittest
+from unittest import mock
 
 from certbot import errors
 from certbot.compat import filesystem
 from certbot.compat import os
 import certbot.tests.util as test_util
 
-try:
-    import mock
-except ImportError: # pragma: no cover
-    from unittest import mock
-
-
 
 class EnvNoSnapForExternalCallsTest(unittest.TestCase):
     """Tests for certbot.util.env_no_snap_for_external_calls."""
diff --git a/pytest.ini b/pytest.ini
index 42853f26b..704912685 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -11,14 +11,12 @@
 # we release breaking changes.
 #
 # The current warnings being ignored are:
-# 1) The warning raised when importing certbot.tests.util and the external mock
-#    library is installed.
-# 2) A deprecation warning is raised in dnspython==1.15.0 in the oldest tests for
+# 1) A deprecation warning is raised in dnspython==1.15.0 in the oldest tests for
 #    certbot-dns-rfc2136.
-# 3) botocore is currently using deprecated urllib3 functionality. See
-#    https://github.com/boto/botocore/issues/2744.
+# 2) botocore's default TLS settings raise deprecation warnings in Python
+#    3.10+, but their values are sane from a security perspective. See
+#    https://github.com/boto/botocore/issues/2550.
 filterwarnings =
     error
-    ignore:The external mock module:PendingDeprecationWarning
     ignore:decodestring\(\) is a deprecated alias:DeprecationWarning:dns
     ignore:'urllib3.contrib.pyopenssl:DeprecationWarning:botocore
diff --git a/tools/oldest_constraints.txt b/tools/oldest_constraints.txt
index bbbbc579a..2e723bd81 100644
--- a/tools/oldest_constraints.txt
+++ b/tools/oldest_constraints.txt
@@ -45,7 +45,6 @@ jsonschema==3.2.0; python_version >= "3.7"
 lazy-object-proxy==1.7.1; python_version >= "3.7"
 logger==1.4; python_version >= "3.7"
 mccabe==0.7.0; python_version >= "3.7"
-mock==1.0.1
 mypy-extensions==0.4.3; python_version >= "3.7"
 mypy==0.971; python_version >= "3.7"
 ndg-httpsclient==0.3.2
@@ -92,7 +91,6 @@ tomli==2.0.1; python_version < "3.11" and python_version >= "3.7" or python_full
 tox==1.9.2; python_version >= "3.7"
 typed-ast==1.5.4; python_version >= "3.7" and python_version < "3.8" or implementation_name == "cpython" and python_version < "3.8" and python_version >= "3.7"
 types-cryptography==3.3.21; python_version >= "3.7"
-types-mock==4.0.15; python_version >= "3.7"
 types-pyopenssl==22.0.9; python_version >= "3.7"
 types-pyrfc3339==1.1.1; python_version >= "3.7"
 types-python-dateutil==2.8.19; python_version >= "3.7"
diff --git a/tools/pinning/current/pyproject.toml b/tools/pinning/current/pyproject.toml
index eb42ecd34..77b4fdf8d 100644
--- a/tools/pinning/current/pyproject.toml
+++ b/tools/pinning/current/pyproject.toml
@@ -50,13 +50,6 @@ awscli = ">=1.22.76"
 # as a dependency here to ensure a version of cython is pinned for extra
 # stability.
 cython = "*"
-# We install mock in our "external-mock" tox environment to test that we didn't
-# break Certbot's test API which used to always use mock objects from the 3rd
-# party mock library. We list the mock dependency here so that is pinned, but
-# we don't depend on it in Certbot to avoid installing mock when it's not
-# needed. This dependency can be removed here once Certbot's support for the
-# 3rd party mock library has been dropped.
-mock = "*"
 # poetry 1.2.0+ is required for it to pin pip, setuptools, and wheel. See
 # https://github.com/python-poetry/poetry/issues/1584. This version is required
 # here in addition to certbot/setup.py because otherwise the pre-release
diff --git a/tools/pinning/oldest/pyproject.toml b/tools/pinning/oldest/pyproject.toml
index b6aed9dc0..67b835551 100644
--- a/tools/pinning/oldest/pyproject.toml
+++ b/tools/pinning/oldest/pyproject.toml
@@ -61,7 +61,6 @@ google-api-python-client = "1.5.5"
 httplib2 = "0.9.2"
 idna = "2.6"
 ipaddress = "1.0.16"
-mock = "1.0.1"
 ndg-httpsclient = "0.3.2"
 oauth2client = "4.0.0"
 parsedatetime = "2.4"
diff --git a/tools/requirements.txt b/tools/requirements.txt
index e25e7f565..36b0f5128 100644
--- a/tools/requirements.txt
+++ b/tools/requirements.txt
@@ -84,7 +84,6 @@ lockfile==0.12.2
 markupsafe==2.1.1; python_version >= "3.7"
 matplotlib-inline==0.1.3; python_version >= "3.7"
 mccabe==0.7.0; python_version >= "3.7"
-mock==4.0.3
 msgpack==1.0.4; python_version >= "3.7" and python_version < "4.0"
 msrest==0.6.21; python_version >= "3.7"
 mypy-extensions==0.4.3; python_version >= "3.7"
@@ -170,7 +169,6 @@ traitlets==5.3.0; python_version >= "3.7"
 twine==3.3.0; python_version >= "3.7"
 typed-ast==1.5.4; python_version >= "3.7" and python_version < "3.8" or implementation_name == "cpython" and python_version < "3.8" and python_version >= "3.7"
 types-cryptography==3.3.21; python_version >= "3.7"
-types-mock==4.0.15; python_version >= "3.7"
 types-pyopenssl==22.0.9; python_version >= "3.7"
 types-pyrfc3339==1.1.1; python_version >= "3.7"
 types-python-dateutil==2.8.19; python_version >= "3.7"
diff --git a/tox.ini b/tox.ini
index f4776328d..8125304f7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -112,11 +112,6 @@ commands =
 setenv =
     {[testenv:oldest]setenv}
 
-[testenv:external-mock]
-commands =
-    python {toxinidir}/tools/pip_install.py mock
-    {[base]install_and_test} {[base]all_packages}
-
 [testenv:lint{,-win,-posix}]
 basepython = python3
 # separating into multiple invocations disables cross package