Air at a certain altitude would also "fail" "your test" and it does correlate with Temp, so you are outed as 100% full of shit again...
Atmosphere is rigid on one side and force constrained on the other. The volume hence is fixed for a given temperature and number of gas molecules. Change one and you added a force, which changes volume.
It is funny that air pressure and temperature correlate
in a fixed container
at a given altitude in an atmosphere
in a tire
on Mars
on Pluto
but somehow doesn't, according to Co2 FRAUD faux skeptics, on Earth, in fact they claim it is inversely correlated.... LOL!!!
and they have "data" (fudged) from WU (owned by board member of "Climate Science Legal Defense Fund" = LOL!!!)