diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 0000000..1489bce
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,3 @@
+sphinx>=2.0.0,!=2.1.0 # BSD
+openstackdocstheme>=2.2.1 # Apache-2.0
+reno>=3.1.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 80703a8..ed0f57f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -12,11 +12,8 @@ coverage>=3.6
 ddt>=0.7.0
 python-subunit>=0.0.18
 selenium>=2.50.1 # Apache-2.0
-sphinx>=2.0.0,!=2.1.0 # BSD
-openstackdocstheme>=2.2.1 # Apache-2.0
 testrepository>=0.0.18
 testscenarios>=0.4
 testtools>=1.4.0
 # This also needs xvfb library installed on your OS
 xvfbwrapper>=0.1.3 #license: MIT
-reno>=3.1.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index a2de3a1..688ff9f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -29,6 +29,8 @@ commands = /bin/bash run_tests.sh -N --integration --selenium-headless {posargs}
 commands = python setup.py testr --coverage --testr-args={posargs}
 
 [testenv:docs]
+deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+       -r{toxinidir}/doc/requirements.txt
 commands =
   sphinx-build -a -E -W -b html doc/source doc/build/html
 
@@ -36,6 +38,7 @@ commands =
 commands = oslo_debug_helper {posargs}
 
 [testenv:releasenotes]
+deps = {[testenv:docs]deps}
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [flake8]