diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 0000000000..079b9941d0
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,11 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+sphinx!=1.6.6,>=1.6.2 # BSD
+oslosphinx>=4.7.0 # Apache-2.0
+reno>=2.5.0 # Apache-2.0
+
+fixtures>=3.0.0 # Apache-2.0/BSD
+testresources>=2.0.0 # Apache-2.0/BSD
+testscenarios>=0.4 # Apache-2.0/BSD
+oslotest>=3.2.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index e0d270c7e3..4e3254e4c2 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,10 +8,8 @@ fixtures>=3.0.0 # Apache-2.0/BSD
 flake8-import-order==0.12 # LGPLv3
 mock>=2.0.0 # BSD
 
-sphinx!=1.6.6,>=1.6.2 # BSD
 psycopg2>=2.6.2 # LGPL/ZPL
 PyMySQL>=0.7.6 # MIT License
-oslosphinx>=4.7.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 oslo.privsep>=1.23.0 # Apache-2.0
 pyroute2>=0.4.21;sys_platform!='win32' # Apache-2.0 (+ dual licensed GPL2)
@@ -20,8 +18,6 @@ testresources>=2.0.0 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 testscenarios>=0.4 # Apache-2.0/BSD
 WebTest>=2.0.27 # MIT
-# This is needed for subunit-trace
-reno>=2.5.0 # Apache-2.0
 bandit>=1.1.0 # Apache-2.0
 tempest>=17.1.0 # Apache-2.0
 pylint==1.4.5 # GPLv2
diff --git a/tox.ini b/tox.ini
index 0b5d36389f..899030e3ce 100644
--- a/tox.ini
+++ b/tox.ini
@@ -47,6 +47,7 @@ commands =
 sitepackages = True
 
 [testenv:releasenotes]
+deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:py27]
@@ -82,7 +83,8 @@ commands =
 commands = {posargs}
 
 [testenv:docs]
-commands = sphinx-build -W -b html doc/source doc/build/html
+deps = -r{toxinidir}/doc/requirements.txt
+commands = sphinx-build -b html doc/source doc/build/html
 
 [flake8]
 # E125 continuation line does not distinguish itself from next logical line