Issue #14930: Make memoryview objects weakrefable.
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index e3629ff..b024d9a 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -778,7 +778,7 @@
         check(int(PyLong_BASE**2-1), size(vh) + 2*self.longdigit)
         check(int(PyLong_BASE**2), size(vh) + 3*self.longdigit)
         # memoryview
-        check(memoryview(b''), size(h + 'PPiP4P2i5P3cP'))
+        check(memoryview(b''), size(h + 'PPiP4P2i5P3c2P'))
         # module
         check(unittest, size(h + '3P'))
         # None