diff --git a/tox.ini b/tox.ini
index 81d0b1c..1bb9ffb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,14 +13,15 @@ deps =
  -r{toxinidir}/requirements.txt
 commands =
     stestr run --slowest {posargs}
-    sphinx-build -b doctest doc/source doc/build
-    doc8 --ignore-path "doc/source/history.rst" doc/source
 
 [testenv:debug]
 commands = oslo_debug_helper {posargs}
 
 [testenv:pep8]
-commands = flake8
+commands =
+    flake8
+    sphinx-build -b doctest doc/source doc/build
+    doc8 --ignore-path "doc/source/history.rst" doc/source
 
 [testenv:venv]
 commands = {posargs}