diff --git a/Lib/test/test_asyncio/test_windows_events.py b/Lib/test/test_asyncio/test_windows_events.py
index b32477f9d4b..17c204a7563 100644
--- a/Lib/test/test_asyncio/test_windows_events.py
+++ b/Lib/test/test_asyncio/test_windows_events.py
@@ -49,6 +49,7 @@ class ProactorTests(unittest.TestCase):
         trans.close()
         self.loop.run_until_complete(f)
         self.assertEqual(f.result(), b'')
+        b.close()
 
     def test_double_bind(self):
         ADDRESS = r'\\.\pipe\test_double_bind-%s' % os.getpid()