the Slice in x[::] has to have step as None to help the interpreter
diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index 4e311e4..6dca5d2 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -150,7 +150,8 @@
slc = ast.parse("x[::]").body[0].value.slice
self.assertIsNone(slc.upper)
self.assertIsNone(slc.lower)
- self.assertIsNone(slc.step)
+ self.assertTrue(isinstance(slc.step, ast.Name))
+ self.assertEqual(slc.step.id, "None")
def test_from_import(self):
im = ast.parse("from . import y").body[0]