diff --git a/buildout.cfg b/buildout.cfg
index 8a5a0ea..1e43da3 100644
--- a/buildout.cfg
+++ b/buildout.cfg
@@ -1,2 +1,2 @@
 [buildout]
-extends = test-plone-3.3.x.cfg
+extends = test-plone-4.0.x.cfg