diff --git a/tox.ini b/tox.ini
index 354e589179..97cf5e54dc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -68,6 +68,14 @@ commands =
 commands =
   {toxinidir}/tools/build-install-guides-rst.sh ubuntu
 
+[testenv:build]
+commands =
+  {toxinidir}/tools/build-rst.sh \
+    doc/{posargs} \
+    --glossary \
+    --build build \
+    --target {posargs}
+
 [testenv:publishdocs]
 # Prepare all documents (except www subdir) so that they can get
 # published on docs.openstack.org with just copying publish-docs/*