--- a/devtools/testlib.py	Tue Mar 12 12:04:51 2013 +0100
+++ b/devtools/testlib.py	Tue Mar 12 12:08:22 2013 +0100
@@ -85,8 +85,7 @@
 
 class JsonValidator(object):
     def parse_string(self, data):
-        json.loads(data)
-        return data
+        return json.loads(data)
 
 # email handling, to test emails sent by an application ########################