diff --git a/tox.ini b/tox.ini
index ce9115f66..1e6829918 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,5 +27,6 @@ commands=
 [testenv:docs]
 description = Build documentation
 deps = -r{toxinidir}/docs/requirements.txt
+skip_install = True
 commands =
-    sphinx-build -E -W -d docs/build/doctrees -b html docs docs/build/html
+    sphinx-build -T -E -W --keep-going {tty:--color} -d docs/build/doctrees -b html docs docs/build/html