diff --git a/rfc3161/api.py b/rfc3161/api.py
index 889da4d..6f44104 100644
--- a/rfc3161/api.py
+++ b/rfc3161/api.py
@@ -182,7 +182,6 @@ class RemoteTimestamper(object):
             response = urllib2.urlopen(http_request).read()
         except (IOError, socket.error), e:
             raise TimestampingError('Unable to send the request to %s' % self.url, e)
-        open('response.tsr', 'w').write(response)
         tst_response, substrate = decoder.decode(response, asn1Spec=rfc3161.TimeStampResp())
         if substrate:
             return False, 'Extra data returned'
diff --git a/tests/api.py b/tests/api.py
index 10dea5e..95f8c5b 100644
--- a/tests/api.py
+++ b/tests/api.py
@@ -26,7 +26,7 @@ class Rfc3161(unittest.TestCase):
         PASSWORD = 'teszt'
         CERTIFICATE = os.path.join(os.path.dirname(__file__),
                 '../data/e_szigno_test_tsa2.crt')
-        data = 'xx'
+        data = '{"comment": "Envoi en Commission", "to": "Benjamin Dauvergne", "filetype": "Arr\u00eat CC", "from": "Benjamin Dauvergne", "files": [{"name": "affectations_ange1d.xlsx", "digest": "ce57e4ba353107dddaab91b9ad26c0569ffe0f94", "size": 16279}]}'
         certificate = file(CERTIFICATE).read()
         value, substrate = rfc3161.RemoteTimestamper(
                 PUBLIC_TSA_SERVER, certificate=certificate, username=USERNAME,