diff --git a/requirements.txt b/requirements.txt
index 3f81433..1d18dd3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,5 +3,3 @@
 # process, which may cause wedges in the gate later.
 
 pbr>=2.0 # Apache-2.0
-sphinx>=1.6.2 # BSD
-openstackdocstheme>=1.11.0  # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
new file mode 100644
index 0000000..7a5c9c5
--- /dev/null
+++ b/test-requirements.txt
@@ -0,0 +1,6 @@
+# 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>=1.6.2 # BSD
+openstackdocstheme>=1.11.0  # Apache-2.0
diff --git a/tox.ini b/tox.ini
index e3b8655..951953b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,9 @@ skipsdist = True
 usedevelop = True
 setenv = VIRTUAL_ENV={envdir}
 install_command = pip install -U {opts} {packages}
-deps = -r{toxinidir}/requirements.txt
+deps =
+  -r{toxinidir}/requirements.txt
+  -r{toxinidir}/test-requirements.txt
 
 [testenv:venv]
 commands = {posargs}