diff --git a/test-requirements.txt b/test-requirements.txt
deleted file mode 100644
index a8d9df17ea..0000000000
--- a/test-requirements.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-# The order of packages is significant, because pip processes them in the order
-# of appearance. Changing the order has an impact on the overall integration
-# process, which may cause wedges in the gate later.
-hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
-bashate>=0.2 # Apache-2.0
-PyYAML>=3.10.0 # MIT
-ansible-lint>=4.1.0
-openstacksdk
-zuul-sphinx>=0.2.3
-testtools
-mock
-# testinfra 1.17.0 has a broken wheel that won't install under python3
-# testinfra 3.0.0 switched the ansible backend, but broke ipv6 handling
-testinfra!=1.17.0,!=3.0.0
-pytest-html # MPL-2.0
-# testinfra's ansible backend actually requires paramiko, but it's not
-# specified.  After
-#  https://github.com/philpep/testinfra/pull/454
-# releases we can do testinfra[ansible] here instead
-ansible>=2.8.0
-paramiko
-
diff --git a/tox.ini b/tox.ini
index 27db0cbad1..8fd42544dc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,9 +7,16 @@ skipsdist = True
 basepython = python3
 usedevelop = True
 install_command = pip install {opts} {packages}
-deps = -r{toxinidir}/test-requirements.txt
 
 [testenv:linters]
+deps =
+  hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
+  bashate>=0.2 # Apache-2.0
+  PyYAML>=3.10.0 # MIT
+  ansible-lint>=4.1.0
+  openstacksdk
+  testtools
+  mock
 whitelist_externals = bash
 setenv =
   ANSIBLE_LIBRARY= {toxinidir}/tools/fake-ansible/library
@@ -25,14 +32,18 @@ commands =
   python3 -m unittest playbooks/roles/install-ansible/files/inventory_plugins/test_yamlgroup.py
   bash -c "find roles playbooks -type f -regex '.*.y[a]?ml' -print0 | xargs -t -n1 -0 ansible-lint"
 
-[testenv:venv]
-commands = {posargs}
-
 [testenv:docs]
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -E -b html doc/source doc/build/html
 
 [testenv:testinfra]
+deps =
+  # testinfra 1.17.0 has a broken wheel that won't install under python3
+  # testinfra 3.0.0 switched the ansible backend, but broke ipv6 handling
+  testinfra!=1.17.0,!=3.0.0
+  ansible-base
+  pytest-html # MPL-2.0
+
 # This environment assumes a gate-hosts.yaml file has been written.
 passenv =
   TESTINFRA_EXTRA_DATA
diff --git a/zuul.d/system-config-run.yaml b/zuul.d/system-config-run.yaml
index bc0d6a1945..301813ada9 100644
--- a/zuul.d/system-config-run.yaml
+++ b/zuul.d/system-config-run.yaml
@@ -62,6 +62,7 @@
         - name: focal
           label: ubuntu-focal
     files:
+      - tox.ini
       - playbooks/
       - roles/
       - testinfra/