diff --git a/src/wormhole/test/test_twisted.py b/src/wormhole/test/test_twisted.py
index fe016f4..60f4ee2 100644
--- a/src/wormhole/test/test_twisted.py
+++ b/src/wormhole/test/test_twisted.py
@@ -43,8 +43,8 @@ class Basic(unittest.TestCase):
         def _done(dl):
             ((success1, dataX), (success2, dataY)) = dl
             r1,r2 = dl
-            self.assertTrue(success1)
-            self.assertTrue(success2)
+            self.assertTrue(success1, dataX)
+            self.assertTrue(success2, dataY)
             self.assertEqual(dataX, "data2")
             self.assertEqual(dataY, "data1")
         d.addCallback(_done)
@@ -62,8 +62,8 @@ class Basic(unittest.TestCase):
         def _done(dl):
             ((success1, dataX), (success2, dataY)) = dl
             r1,r2 = dl
-            self.assertTrue(success1)
-            self.assertTrue(success2)
+            self.assertTrue(success1, dataX)
+            self.assertTrue(success2, dataY)
             self.assertEqual(dataX, "data2")
             self.assertEqual(dataY, "data1")
         d.addCallback(_done)
@@ -104,8 +104,8 @@ class Basic(unittest.TestCase):
         def _done(dl):
             ((success1, dataX), (success2, dataY)) = dl
             r1,r2 = dl
-            self.assertTrue(success1)
-            self.assertTrue(success2)
+            self.assertTrue(success1, dataX)
+            self.assertTrue(success2, dataY)
             self.assertEqual(dataX, "data2")
             self.assertEqual(dataY, "data1")
             self.assertRaises(UsageError, w2.serialize) # too late
diff --git a/src/wormhole/twisted/transcribe.py b/src/wormhole/twisted/transcribe.py
index 712bd3a..d1143c7 100644
--- a/src/wormhole/twisted/transcribe.py
+++ b/src/wormhole/twisted/transcribe.py
@@ -44,6 +44,9 @@ class DataProducer:
 
 
 class SymmetricWormhole:
+    motd_displayed = False
+    version_warning_displayed = False
+
     def __init__(self, appid, relay):
         self.appid = appid
         self.relay = relay
@@ -53,6 +56,34 @@ class SymmetricWormhole:
         self.key = None
         self._started_get_code = False
 
+    def _url(self, verb, msgnum=None):
+        url = "%s%d/%s/%s" % (self.relay, self.channel_id, self.side, verb)
+        if msgnum is not None:
+            url += "/" + msgnum
+        return url
+
+    def handle_welcome(self, welcome):
+        if ("motd" in welcome and
+            not self.motd_displayed):
+            motd_lines = welcome["motd"].splitlines()
+            motd_formatted = "\n ".join(motd_lines)
+            print("Server (at %s) says:\n %s" % (self.relay, motd_formatted),
+                  file=sys.stderr)
+            self.motd_displayed = True
+
+        # Only warn if we're running a release version (e.g. 0.0.6, not
+        # 0.0.6-DISTANCE-gHASH). Only warn once.
+        if ("-" not in __version__ and
+            not self.version_warning_displayed and
+            welcome["current_version"] != __version__):
+            print("Warning: errors may occur unless both sides are running the same version", file=sys.stderr)
+            print("Server claims %s is current, but ours is %s"
+                  % (welcome["current_version"], __version__), file=sys.stderr)
+            self.version_warning_displayed = True
+
+        if "error" in welcome:
+            raise ServerError(welcome["error"], self.relay)
+
     def get_code(self, code_length=2):
         if self.code is not None: raise UsageError
         if self._started_get_code: raise UsageError
@@ -141,37 +172,6 @@ class SymmetricWormhole:
         self.msg1 = d["msg1"].decode("hex")
         return self
 
-    motd_displayed = False
-    version_warning_displayed = False
-
-    def handle_welcome(self, welcome):
-        if ("motd" in welcome and
-            not self.motd_displayed):
-            motd_lines = welcome["motd"].splitlines()
-            motd_formatted = "\n ".join(motd_lines)
-            print("Server (at %s) says:\n %s" % (self.relay, motd_formatted),
-                  file=sys.stderr)
-            self.motd_displayed = True
-
-        # Only warn if we're running a release version (e.g. 0.0.6, not
-        # 0.0.6-DISTANCE-gHASH). Only warn once.
-        if ("-" not in __version__ and
-            not self.version_warning_displayed and
-            welcome["current_version"] != __version__):
-            print("Warning: errors may occur unless both sides are running the same version", file=sys.stderr)
-            print("Server claims %s is current, but ours is %s"
-                  % (welcome["current_version"], __version__), file=sys.stderr)
-            self.version_warning_displayed = True
-
-        if "error" in welcome:
-            raise ServerError(welcome["error"], self.relay)
-
-    def _url(self, verb, msgnum=None):
-        url = "%s%d/%s/%s" % (self.relay, self.channel_id, self.side, verb)
-        if msgnum is not None:
-            url += "/" + msgnum
-        return url
-
     def _post_message(self, url, msg):
         # TODO: retry on failure, with exponential backoff. We're guarding
         # against the rendezvous server being temporarily offline.
@@ -257,8 +257,10 @@ class SymmetricWormhole:
         # for each side, so we use the same key for both. We use random
         # nonces to keep the messages distinct, and check for reflection.
         data_key = self.derive_key(b"data-key")
+
         outbound_encrypted = self._encrypt_data(data_key, outbound_data)
         d = self._post_message(self._url("post", "data"), outbound_encrypted)
+
         d.addCallback(lambda msgs: self._get_message(msgs, "poll", "data"))
         def _got_data(inbound_encrypted):
             if inbound_encrypted == outbound_encrypted: