diff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -9,16 +9,17 @@ import subprocess
 import sys
 import sysconfig
 import textwrap
 import time
 import unittest
 from test import support
 from test.support import MISSING_C_DOCSTRINGS
 from test.support.script_helper import assert_python_failure
+from test.support import script_helper
 try:
     import _posixsubprocess
 except ImportError:
     _posixsubprocess = None
 try:
     import threading
 except ImportError:
     threading = None
@@ -48,22 +49,24 @@ class CAPITest(unittest.TestCase):
 
         InstanceMethod.testfunction.attribute = "test"
         self.assertEqual(testfunction.attribute, "test")
         self.assertRaises(AttributeError, setattr, inst.testfunction, "attribute", "test")
 
     @unittest.skipUnless(threading, 'Threading required for this test.')
     def test_no_FatalError_infinite_loop(self):
         with support.SuppressCrashReport():
-            p = subprocess.Popen([sys.executable, "-c",
-                                  'import _testcapi;'
-                                  '_testcapi.crash_no_current_thread()'],
-                                 stdout=subprocess.PIPE,
-                                 stderr=subprocess.PIPE)
-        (out, err) = p.communicate()
+
+            run_result, cmd_line = \
+                script_helper.run_python_until_end('-c',
+                                                   'import _testcapi;'
+                                                   '_testcapi.crash_no_current_thread()')
+
+        rc, out, err = run_result
+
         self.assertEqual(out, b'')
         # This used to cause an infinite loop.
         self.assertTrue(err.rstrip().startswith(
                          b'Fatal Python error:'
                          b' PyThreadState_Get: no current thread'))
 
     def test_memoryview_from_NULL_pointer(self):
         self.assertRaises(ValueError, _testcapi.make_memoryview_from_NULL_pointer)