Conversation so far:
where does north korea test its nuclear weapons
Punggye-ri Nuclear Test Site was the only known nuclear test site of North Korea.
Where does France test its nuclear weapons?
France's TN 75 first full-yield test was probably the 110 kt detonation on 1 October 1995 at Fangataufa.
why are nuclear weapons tests done
Nuclear weapons tests are experiments carried out to determine the effectiveness, yield, and explosive capability of nuclear weapons.
can you tell me more reasons nuclear weapons tests are done
Testing nuclear weapons offers information about how the weapons function under different conditions; and how personnel, structures, and equipment are affected when subjected to nuclear explosions.

Question: when was the latest test
Self-contained rewrite: when was the latest nuclear test