PEP 0492 -- Coroutines with async and await syntax. Issue #24017.
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index 6d2763b..494a53b 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -1025,9 +1025,9 @@
         # static type: PyTypeObject
         s = vsize('P2n15Pl4Pn9Pn11PIP')
         check(int, s)
-        # (PyTypeObject + PyNumberMethods + PyMappingMethods +
+        # (PyTypeObject + PyAsyncMethods + PyNumberMethods + PyMappingMethods +
         #  PySequenceMethods + PyBufferProcs + 4P)
-        s = vsize('P2n17Pl4Pn9Pn11PIP') + struct.calcsize('34P 3P 10P 2P 4P')
+        s = vsize('P2n17Pl4Pn9Pn11PIP') + struct.calcsize('34P 3P 3P 10P 2P 4P')
         # Separate block for PyDictKeysObject with 4 entries
         s += struct.calcsize("2nPn") + 4*struct.calcsize("n2P")
         # class