Fix another unexamined Future

diff --git a/tornado/test/iostream_test.py b/tornado/test/iostream_test.py
index 2a7e74b3174eda6624875ac8a244635b001d392d..973b0e7bfa465ff611c6b9b9f53387fc4d046aab 100644 (file)
--- a/tornado/test/iostream_test.py
+++ b/tornado/test/iostream_test.py
@@ -892,13 +892,15 @@ class TestIOStreamStartTLS(AsyncTestCase):
         # Test that server_hostname parameter to start_tls is being used.
         # The check_hostname functionality is only available in python 2.7 and
         # up and in python 3.4 and up.
-        self.server_start_tls(_server_ssl_options())
+        server_future = self.server_start_tls(_server_ssl_options())
         client_future = self.client_start_tls(
             ssl.create_default_context(),
             server_hostname=b'127.0.0.1')
         with ExpectLog(gen_log, "SSL Error"):
             with self.assertRaises(ssl.SSLError):
                 yield client_future
+        with self.assertRaises(ssl.SSLError):
+            yield server_future
 
 
 @skipIfNonUnix