From 4e836b43229e3f0d65c5595403df87c3f9b49775 Mon Sep 17 00:00:00 2001
From: Antoine Pitrou <antoine@python.org>
Date: Tue, 15 Nov 2016 12:41:16 +0100
Subject: [PATCH] Fix for PyPy

---
 tornado/test/concurrent_test.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tornado/test/concurrent_test.py b/tornado/test/concurrent_test.py
index 92a4a62d6..4e5118b17 100644
--- a/tornado/test/concurrent_test.py
+++ b/tornado/test/concurrent_test.py
@@ -15,6 +15,7 @@
 # under the License.
 from __future__ import absolute_import, division, print_function, with_statement
 
+import gc
 import logging
 import re
 import socket
@@ -187,6 +188,7 @@ class ReturnFutureTest(AsyncTestCase):
             yield gen.moment
             yield gen.moment
             del g
+            gc.collect()  # for PyPy
 
 
 # The following series of classes demonstrate and test various styles
-- 
2.47.2