diff --git a/Makefile b/Makefile
index 390c954..70d1763 100644
--- a/Makefile
+++ b/Makefile
@@ -1,13 +1,8 @@
-# Copyright 2017 Canonical Ltd.
+# Copyright 2017,2024 Canonical Ltd.
 # Licensed under the LGPLv3, see LICENCE file for details.
 include sysdeps.mk
 
 PYTHON = python
-# Since the python-tox package in Ubuntu uses Python 3, use pip to install tox
-# instead. This also works on OSX where tox is not present in Homebrew.
-PIP_SYSDEPS = tox
-
-PIP = sudo pip install $(1)
 
 SYSDEPS_INSTALLED = .sysdeps-installed
 DEVENV = venv
@@ -28,7 +23,6 @@ else
 	@echo 'Debian packages:'
 	@echo '$(APT_SYSDEPS).'
 endif
-	sudo pip3 install $(PIP_SYSDEPS)
 	touch $(SYSDEPS_INSTALLED)
 
 
diff --git a/sysdeps.mk b/sysdeps.mk
index d3bffee..dcb9005 100644
--- a/sysdeps.mk
+++ b/sysdeps.mk
@@ -1 +1 @@
-APT_SYSDEPS = python3-pip python3-setuptools libsodium-dev libffi-dev libssl-dev
+APT_SYSDEPS = python3-pip python3-setuptools libsodium-dev libffi-dev libssl-dev tox isort
diff --git a/test-requirements.txt b/test-requirements.txt
index 27a0b39..2f26d5e 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,4 +1,4 @@
-# Copyright 2017 Canonical Ltd.
+# Copyright 2017,2024 Canonical Ltd.
 # Licensed under the LGPLv3, see LICENCE file for details.
 
 coverage==7.3.2
@@ -11,6 +11,7 @@ mock==1.0.1
 nose2==0.13.0
 pbr==3.1.1
 python-mimeparse==1.6.0
+setuptools==75.1.0
 testtools==2.3.0; python_version<"3"
 testtools==2.5.0; python_version>="3"
 traceback2==1.4.0