diff --git a/Lib/test/test_pty.py b/Lib/test/test_pty.py
index 55ab914..4f1251c 100644
--- a/Lib/test/test_pty.py
+++ b/Lib/test/test_pty.py
@@ -253,7 +253,7 @@
 
         # Test that the right data went to the right places.
         rfds = select.select([read_from_stdout_fd, masters[1]], [], [], 0)[0]
-        self.assertSameElements([read_from_stdout_fd, masters[1]], rfds)
+        self.assertEqual([read_from_stdout_fd, masters[1]], rfds)
         self.assertEqual(os.read(read_from_stdout_fd, 20), b'from master')
         self.assertEqual(os.read(masters[1], 20), b'from stdin')