diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 5a26d649d38..865209d7c98 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -281,7 +281,7 @@ class PosixTester(unittest.TestCase):
             check_stat(uid, gid)
             self.assertRaises(OSError, chown_func, first_param, 0, -1)
             check_stat(uid, gid)
-            if gid != 0:
+            if 0 not in os.getgroups():
                 self.assertRaises(OSError, chown_func, first_param, -1, 0)
                 check_stat(uid, gid)
         # test illegal types