diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 0000000..60ba470
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,4 @@
+sphinx>=2.0.0,!=2.1.0 # BSD
+openstackdocstheme>=2.2.1 # Apache-2.0
+# releasenotes
+reno>=3.1.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 00b5616..93fc72c 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,10 +6,6 @@ hacking>=3.1.0,<3.2.0 # Apache-2.0
 
 coverage>=4.0,!=4.4 # Apache-2.0
 python-subunit>=0.0.18 # Apache-2.0/BSD
-sphinx>=2.0.0,!=2.1.0 # BSD
 oslotest>=1.10.0 # Apache-2.0
 testrepository>=0.0.18  # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
-openstackdocstheme>=2.2.1 # Apache-2.0
-# releasenotes
-reno>=3.1.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index 52a1282..af28373 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,9 +26,12 @@ commands = {posargs}
 commands = python setup.py test --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 -W -b html doc/source doc/build/html
 
 [testenv:releasenotes]
+deps = {[testenv:docs]deps}
 commands =
   sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html