Issue #20532: Tests which use _testcapi now are marked as CPython only.

1 files changed, 12 insertions, 4 deletions

diff --git a/Lib/test/test_devpoll.py b/Lib/test/test_devpoll.py
index 7fa4203..e634d3a 100644
--- a/Lib/test/test_devpoll.py
+++ b/Lib/test/test_devpoll.py
@@ -7,8 +7,7 @@ import random
 import select
 import sys
 import unittest
-from test.support import TESTFN, run_unittest
-from _testcapi import USHRT_MAX
+from test.support import TESTFN, run_unittest, cpython_only
 
 try:
     select.devpoll
@@ -121,15 +120,24 @@ class DevPollTests(unittest.TestCase):
         self.addCleanup(devpoll.close)
         self.assertEqual(os.get_inheritable(devpoll.fileno()), False)
 
-
     def test_events_mask_overflow(self):
         pollster = select.devpoll()
         w, r = os.pipe()
         pollster.register(w)
         # Issue #17919
         self.assertRaises(OverflowError, pollster.register, 0, -1)
-        self.assertRaises(OverflowError, pollster.register, 0, USHRT_MAX + 1)
+        self.assertRaises(OverflowError, pollster.register, 0, 1 << 64)
         self.assertRaises(OverflowError, pollster.modify, 1, -1)
+        self.assertRaises(OverflowError, pollster.modify, 1, 1 << 64)
+
+    @cpython_only
+    def test_events_mask_overflow_c_limits(self):
+        from _testcapi import USHRT_MAX
+        pollster = select.devpoll()
+        w, r = os.pipe()
+        pollster.register(w)
+        # Issue #17919
+        self.assertRaises(OverflowError, pollster.register, 0, USHRT_MAX + 1)
         self.assertRaises(OverflowError, pollster.modify, 1, USHRT_MAX + 1)