Make some tests more stable by adding more explicit ordering

Peter Eisentraut <peter@eisentraut.org>

Commit: cd8844e7db64d57554c780ec9881457c573c51ab
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2026-03-16T15:24:22Z
Make some tests more stable by adding more explicit ordering

for some tests added by commit 2f094e7ac69, based on buildfarm results

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