diff --git a/Lib/test/test_asyncio/test_base_events.py b/Lib/test/test_asyncio/test_base_events.py
index dff01d2c11b..bedfe16c15c 100644
--- a/Lib/test/test_asyncio/test_base_events.py
+++ b/Lib/test/test_asyncio/test_base_events.py
@@ -782,10 +782,9 @@ class BaseEventLoopTests(test_utils.TestCase):
         self.loop._selector.select.return_value = (event_sentinel,)
 
         for i in range(1, 3):
-            # with self.subTest('Loop %d/2' % i):  # Not in Python 3.3.
-                self.loop.call_soon(self.loop.stop)
-                self.loop.run_forever()
-                self.assertEqual(callcount, 1)
+            self.loop.call_soon(self.loop.stop)
+            self.loop.run_forever()
+            self.assertEqual(callcount, 1)
 
     def test_run_once(self):
         # Simple test for test_utils.run_once().  It may seem strange