Pass --quiet to meson test.
Less is more, in this case.
x11)
xvfb-run -a -s "-screen 0 1024x768x24 -noreset" \
meson test -C ${builddir} \
+ --quiet \
--timeout-multiplier "${multiplier}" \
--print-errorlogs \
--setup=${backend} \
export WAYLAND_DISPLAY=wayland-5
meson test -C ${builddir} \
+ --quiet \
--timeout-multiplier "${multiplier}" \
--print-errorlogs \
--setup=${backend} \
export BROADWAY_DISPLAY=:5
meson test -C ${builddir} \
+ --quiet \
--timeout-multiplier "${multiplier}" \
--print-errorlogs \
--setup=${backend} \