Fix reversed test trying to fix bug #5713

(It instead ensured that only 'top' had a SUP keyword)

This clearly shows that 937b466266256d26d02cf8d48e72a26272fe8627 was
not a full or correct fix, but despite this I can no longer reproduce
the issue.  Further investigation is required.

Andrew Bartlett
(This used to be commit 95a9e9b6b84866cd300b1d19915627c6718b4dde)