diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index f2a396c..265859a 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -801,7 +801,7 @@
 
 unit_tests = [ProcessTestCase, CommandTests]
 
-if subprocess._has_poll:
+if getattr(subprocess, '_has_poll', False):
     class ProcessTestCaseNoPoll(ProcessTestCase):
         def setUp(self):
             subprocess._has_poll = False