Two tests provoke EACCES via chmod (saveAliases backup double failure,
appendSessionContent on a read-only file) and already skip on win32, but
root ignores file modes so both fail when the suite runs as root (for
example in a default Docker container). Every other chmod-based test in
the repo already guards with process.getuid?.() === 0; these two were the
only ones missing the guard. Apply the same skip condition and message.