diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index a9723b18f32..7b5d5192634 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -734,7 +734,7 @@ class ProcessTestCase(unittest.TestCase):
             self.assertNotEqual(p.wait(), 0)
 
 class HelperFunctionTests(unittest.TestCase):
-    def test_eintr_retry_call(self):
+    def _test_eintr_retry_call(self):
         record_calls = []
         def fake_os_func(*args):
             record_calls.append(args)
@@ -750,6 +750,9 @@ class HelperFunctionTests(unittest.TestCase):
                          subprocess._eintr_retry_call(fake_os_func, 666))
         self.assertEqual([(256, 999), (666,), (666,)], record_calls)
 
+    if not mswindows:
+        test_eintr_retry_call = _test_eintr_retry_call
+
 
 def test_main():
     test_support.run_unittest(ProcessTestCase,