diff --git a/tox.ini b/tox.ini
index 701cf167e..514962de5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -122,7 +122,13 @@ commands = {posargs}
 deps = -r{toxinidir}/doc/requirements.txt
 
 [testenv:docs]
-deps = -r{toxinidir}/doc/requirements.txt
+# Do not remove requirements.txt from deps list as without it
+# upper constraints will not be used for deps listed in requirements.txt
+# and may cause issues
+deps =
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -r{toxinidir}/doc/requirements.txt
+  -r{toxinidir}/requirements.txt
 allowlist_externals =
   rm
 commands =