diff --git a/certbot/certbot/tests/util.py b/certbot/certbot/tests/util.py
index 78236fa06..59b37bfbe 100644
--- a/certbot/certbot/tests/util.py
+++ b/certbot/certbot/tests/util.py
@@ -27,6 +27,9 @@ from certbot.compat import os
 from certbot.display import util as display_util
 
 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 "
diff --git a/tools/pinning/pyproject.toml b/tools/pinning/pyproject.toml
index 0107733d5..20a1f3bf2 100644
--- a/tools/pinning/pyproject.toml
+++ b/tools/pinning/pyproject.toml
@@ -35,6 +35,13 @@ acme = {path = "../../acme", extras = ["dev", "docs"]}
 windows-installer = {path = "../../windows-installer"}
 
 # Extra dependencies
+# 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 = "*"
 # Upgrading coverage, pylint, pytest, and some of pytest's plugins causes many
 # test failures so let's pin these packages back for now.
 coverage = "4.5.4"
diff --git a/tools/requirements.txt b/tools/requirements.txt
index e5a6d3be7..498c1e87a 100644
--- a/tools/requirements.txt
+++ b/tools/requirements.txt
@@ -18,8 +18,8 @@ backcall==0.2.0
 bcrypt==3.2.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.6"
 beautifulsoup4==4.9.3; python_version >= "3.6" and python_version < "4.0"
 bleach==3.3.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0"
-boto3==1.17.44; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.6.0" and python_version >= "3.6"
-botocore==1.20.44; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.6.0" and python_version >= "3.6"
+boto3==1.17.47; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.6.0" and python_version >= "3.6"
+botocore==1.20.47; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.6.0" and python_version >= "3.6"
 cachecontrol==0.12.6; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0"
 cached-property==1.5.2; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.6"
 cachetools==4.2.1; python_version >= "3.5" and python_version < "4.0" and (python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.6.0" and python_version >= "3.6")
@@ -36,7 +36,7 @@ configobj==5.0.6; python_version >= "3.6"
 coverage==4.5.4; (python_version >= "2.6" and python_full_version < "3.0.0") or (python_full_version >= "3.3.0" and python_version < "4")
 crashtest==0.3.1; python_version >= "3.6" and python_version < "4.0" and (python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0")
 cryptography==3.4.7; python_version >= "3.6" and python_full_version < "3.0.0" and python_version < "4.0" and (python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0") and sys_platform == "linux" or python_full_version >= "3.5.0" and python_version >= "3.6" and python_version < "4.0" and (python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0") and sys_platform == "linux"
-decorator==5.0.5
+decorator==5.0.6
 deprecated==1.2.12; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.4.0"
 distlib==0.3.1; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0"
 distro==1.5.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.6"
@@ -80,6 +80,7 @@ lazy-object-proxy==1.4.3; python_version >= "3.6" and python_full_version < "3.0
 lockfile==0.12.2
 markupsafe==1.1.1; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0"
 mccabe==0.6.1; python_version >= "3.6"
+mock==4.0.3; python_version >= "3.6"
 msgpack==1.0.2; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0"
 msrest==0.6.21; python_version >= "3.6"
 mypy-extensions==0.4.3; python_version >= "3.6"
@@ -99,7 +100,7 @@ ply==3.11; python_version >= "3.6"
 poetry-core==1.0.2; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0"
 poetry==1.1.5; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0"
 prompt-toolkit==3.0.3
-protobuf==3.15.7; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.6.0" and python_version >= "3.6"
+protobuf==3.15.8; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.6.0" and python_version >= "3.6"
 ptyprocess==0.7.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0"
 py==1.10.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.6"
 pyasn1-modules==0.2.8; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.6.0" and python_version >= "3.6"
@@ -157,7 +158,7 @@ tldextract==3.1.0; python_version >= "3.6" and python_version < "4.0"
 toml==0.10.2; python_version == "3.6" and python_full_version < "3.0.0" or python_version > "3.6" and python_full_version < "3.0.0" or python_version == "3.6" and python_full_version >= "3.5.0" or python_version > "3.6" and python_full_version >= "3.5.0"
 tomlkit==0.7.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0"
 tox==3.23.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.5.0"
-tqdm==4.59.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.4.0"
+tqdm==4.60.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_version >= "3.6" and python_full_version >= "3.4.0"
 traitlets==4.3.3
 twine==3.3.0; python_version >= "3.6"
 typed-ast==1.4.2; implementation_name == "cpython" and python_version < "3.8" and python_version >= "3.6"