diff --git a/tests/dummysmtpd.py b/tests/dummysmtpd.py
--- a/tests/dummysmtpd.py
+++ b/tests/dummysmtpd.py
@@ -54,8 +54,8 @@
         try:
             # wrap_socket() would block, but we don't care
             conn = sslutil.wrapserversocket(conn, ui, certfile=self._certfile)
-        except ssl.SSLError:
-            log('%s ssl error\n' % addr[0])
+        except ssl.SSLError as e:
+            log('%s ssl error: %r\n' % (addr[0], e))
             conn.close()
             return
         smtpd.SMTPChannel(self, conn, addr)