--- a/req.py	Thu Oct 01 11:57:40 2015 +0200
+++ b/req.py	Thu Oct 01 12:01:28 2015 +0200
@@ -338,6 +338,7 @@
         if PY3:
             for key, val in parse_qsl(querystring):
                 yield key, val
+            return
         if isinstance(querystring, unicode):
             querystring = querystring.encode(self.encoding)
         for key, val in parse_qsl(querystring):