diff -r 7070250bf50d -r 0a927fe4541b devtools/testlib.py
--- a/devtools/testlib.py	Fri Dec 09 12:14:11 2011 +0100
+++ b/devtools/testlib.py	Fri Dec 16 12:30:12 2011 +0100
@@ -605,7 +605,7 @@
         dump = json.dumps
         args = [dump(arg) for arg in args]
         req = self.request(fname=fname, pageid='123', arg=args)
-        ctrl = self.vreg['controllers'].select('json', req)
+        ctrl = self.vreg['controllers'].select('ajax', req)
         return ctrl.publish(), req
 
     def app_publish(self, req, path='view'):