diff --git a/Lib/test/test_parser.py b/Lib/test/test_parser.py
index face39a..b39d37b 100644
--- a/Lib/test/test_parser.py
+++ b/Lib/test/test_parser.py
@@ -611,7 +611,8 @@
         rc, out, err = assert_python_failure('-c', e)
         # parsing the expression will result in an error message
         # followed by a MemoryError (see #11963)
-        self.assertEqual(err, b's_push: parser stack overflow\nMemoryError')
+        self.assertIn(b's_push: parser stack overflow', err)
+        self.assertIn(b'MemoryError', err)
 
 class STObjectTestCase(unittest.TestCase):
     """Test operations on ST objects themselves"""