diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 000000000..66b45ef75
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,4 @@
+sphinx>=1.5.1,<1.6
+sphinxcontrib-programoutput
+sphinxcontrib-httpdomain
+reno>=2.5.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 81b770854..18e1097b0 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,10 +1,6 @@
 # Nodepool uses hacking for its dependencies
 hacking>=0.10.2,<0.11
 coverage
-sphinx>=1.5.1,<1.6
-sphinxcontrib-programoutput
-sphinxcontrib-httpdomain
-reno>=2.5.0 # Apache-2.0
 fixtures>=0.3.12
 mock>=1.0
 python-subunit
diff --git a/tox.ini b/tox.ini
index 8595bd438..1c03cd3e4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -45,6 +45,8 @@ commands =
 
 [testenv:docs]
 basepython = python3
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/doc/requirements.txt
 commands =
   sphinx-build -E -W -d doc/build/doctrees -b html doc/source/ doc/build/html