diff --git a/tox.ini b/tox.ini
index e752e21a..abe206c2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -190,6 +190,7 @@ commands = {[testenv]commands}
 
 [testenv:docs]
 basepython = python3
+install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/doc/requirements.txt
 commands =
     rm -rf doc/build
@@ -198,6 +199,7 @@ allowlist_externals = rm
 
 [testenv:releasenotes]
 basepython = python3
+install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/doc/requirements.txt
 commands =
     rm -rf releasenotes/build
@@ -210,11 +212,13 @@ allowlist_externals =
 basepython = python3
 # Re-use the releasenotes venv
 envdir = {toxworkdir}/releasenotes
+install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/doc/requirements.txt
 commands = reno new {posargs}
 
 [testenv:api-ref]
 basepython = python3
+install_command = pip install -U {opts} {packages}
 deps =
     -r{toxinidir}/doc/requirements.txt
 commands =