diff --git a/tox.ini b/tox.ini
index 7ee13a113..3f2396be8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -108,6 +108,7 @@ commands =
 
 [testenv:venv]
 commands = {posargs}
+deps = -r{toxinidir}/doc/requirements.txt
 
 [testenv:docs]
 basepython = python3