1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 5843b03..7f691d4 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -17,6 +17,7 @@ import stat
 import tempfile
 import unittest
 import warnings
+import _testcapi
 
 _DUMMY_SYMLINK = os.path.join(tempfile.gettempdir(),
                               support.TESTFN + '-dummy-symlink')
@@ -537,6 +538,10 @@ class PosixTester(unittest.TestCase):
         except OSError:
             pass
 
+        # Issue 15989
+        self.assertRaises(OverflowError, os.pipe2, _testcapi.INT_MAX + 1)
+        self.assertRaises(OverflowError, os.pipe2, _testcapi.UINT_MAX + 1)
+
     def test_utime(self):
         if hasattr(posix, 'utime'):
             now = time.time()