diff -r bda5a87df1c8 Lib/test/test_capi.py
--- a/Lib/test/test_capi.py	Fri Sep 13 06:27:52 2013 -0700
+++ b/Lib/test/test_capi.py	Fri Sep 13 08:48:02 2013 -0700
@@ -44,12 +44,13 @@
 
     @unittest.skipUnless(threading, 'Threading required for this test.')
     def test_no_FatalError_infinite_loop(self):
-        with support.suppress_crash_popup():
-            p = subprocess.Popen([sys.executable, "-c",
-                                  'import _testcapi;'
-                                  '_testcapi.crash_no_current_thread()'],
-                                 stdout=subprocess.PIPE,
-                                 stderr=subprocess.PIPE)
+        with support.SuppressCoreFiles():
+            with support.suppress_crash_popup():
+                p = subprocess.Popen([sys.executable, "-c",
+                                      'import _testcapi;'
+                                      '_testcapi.crash_no_current_thread()'],
+                                     stdout=subprocess.PIPE,
+                                     stderr=subprocess.PIPE)
         (out, err) = p.communicate()
         self.assertEqual(out, b'')
         # This used to cause an infinite loop.
diff -r bda5a87df1c8 Lib/test/test_faulthandler.py
--- a/Lib/test/test_faulthandler.py	Fri Sep 13 06:27:52 2013 -0700
+++ b/Lib/test/test_faulthandler.py	Fri Sep 13 08:48:02 2013 -0700
@@ -19,18 +19,6 @@
 
 TIMEOUT = 0.5
 
-try:
-    from resource import setrlimit, RLIMIT_CORE, error as resource_error
-except ImportError:
-    prepare_subprocess = None
-else:
-    def prepare_subprocess():
-        # don't create core file
-        try:
-            setrlimit(RLIMIT_CORE, (0, 0))
-        except (ValueError, resource_error):
-            pass
-
 def expected_traceback(lineno1, lineno2, header, min_count=1):
     regex = header
     regex += '  File "<string>", line %s in func\n' % lineno1
@@ -59,10 +47,8 @@
         build, and replace "Current thread 0x00007f8d8fbd9700" by "Current
         thread XXX".
         """
-        options = {}
-        if prepare_subprocess:
-            options['preexec_fn'] = prepare_subprocess
-        process = script_helper.spawn_python('-c', code, **options)
+        with support.SuppressCoreFiles():
+            process = script_helper.spawn_python('-c', code)
         stdout, stderr = process.communicate()
         exitcode = process.wait()
         output = support.strip_python_stderr(stdout)
@@ -101,8 +87,9 @@
             header=re.escape(header))
         if other_regex:
             regex += '|' + other_regex
-        with support.suppress_crash_popup():
-            output, exitcode = self.get_output(code, filename)
+        with support.SuppressCoreFiles():
+            with support.suppress_crash_popup():
+                output, exitcode = self.get_output(code, filename)
         output = '\n'.join(output)
         self.assertRegex(output, regex)
         self.assertNotEqual(exitcode, 0)
@@ -232,8 +219,9 @@
 faulthandler._sigsegv()
 """.strip()
         not_expected = 'Fatal Python error'
-        with support.suppress_crash_popup():
-            stderr, exitcode = self.get_output(code)
+        with support.SuppressCoreFiles():
+            with support.suppress_crash_popup():
+                stderr, exitcode = self.get_output(code)
         stder = '\n'.join(stderr)
         self.assertTrue(not_expected not in stderr,
                      "%r is present in %r" % (not_expected, stderr))
diff -r bda5a87df1c8 Lib/test/test_sys.py
--- a/Lib/test/test_sys.py	Fri Sep 13 06:27:52 2013 -0700
+++ b/Lib/test/test_sys.py	Fri Sep 13 08:48:02 2013 -0700
@@ -250,15 +250,16 @@
 
             sys.setrecursionlimit(%d)
             f()""")
-        with test.support.suppress_crash_popup():
-            for i in (50, 1000):
-                sub = subprocess.Popen([sys.executable, '-c', code % i],
-                    stderr=subprocess.PIPE)
-                err = sub.communicate()[1]
-                self.assertTrue(sub.returncode, sub.returncode)
-                self.assertIn(
-                    b"Fatal Python error: Cannot recover from stack overflow",
-                    err)
+        with test.support.SuppressCoreFiles():
+            with test.support.suppress_crash_popup():
+                for i in (50, 1000):
+                    sub = subprocess.Popen([sys.executable, '-c', code % i],
+                        stderr=subprocess.PIPE)
+                    err = sub.communicate()[1]
+                    self.assertTrue(sub.returncode, sub.returncode)
+                    self.assertIn(
+                        b"Fatal Python error: Cannot recover from stack overflow",
+                        err)
 
     def test_getwindowsversion(self):
         # Raise SkipTest if sys doesn't have getwindowsversion attribute
diff -r bda5a87df1c8 Lib/test/test_threading.py
--- a/Lib/test/test_threading.py	Fri Sep 13 06:27:52 2013 -0700
+++ b/Lib/test/test_threading.py	Fri Sep 13 08:48:02 2013 -0700
@@ -839,7 +839,8 @@
 
             _testcapi.run_in_subinterp(%r)
             """ % (subinterp_code,)
-        rc, out, err = assert_python_failure("-c", script)
+        with test.support.SuppressCoreFiles():
+            rc, out, err = assert_python_failure("-c", script)
         self.assertIn("Fatal Python error: Py_EndInterpreter: "
                       "not the last thread", err.decode())