diff --git a/tox.ini b/tox.ini
index b1dcd75796..f11b0890b8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,6 +13,7 @@ commands =
     {toxinidir}/tools/validate-all-yaml.sh
     {toxinidir}/tools/validate-all-maintainer.sh
     {toxinidir}/tools/validate-links.sh
+    {toxinidir}/tools/validate-min-env-vars.sh
 
 [testenv:validate-contents]
 deps = PyYAML