diff --git a/versions-4.2.x.cfg b/versions-4.2.x.cfg
index 15ce80a87..7ab4c3e07 100644
--- a/versions-4.2.x.cfg
+++ b/versions-4.2.x.cfg
@@ -14,3 +14,7 @@ plone.app.jquerytools = 1.5.7
 plone.app.tiles = 1.0.1
 plone.app.z3cform = 0.6.3
 plone.directives.form = 1.1
+
+# for testing
+funcsigs = 0.4
+mock = 1.0.1