Nuclear weapons represent a unique existential threat to all humanity. However, despite being a dangerous and widespread threat in its nature, governments are addressing it selectively, not exhaustively. The world is not moving towards disaster like a sleepwalker. The truth is worse, we are asleep in front of the controls of a fast moving plane. Unless we wake up and take control, the result is too predictable. Kofi Annan, former ONU Secretary-General (2006). Possession of nuclear weapons exposes the world population to potentially devastating consequences in the tests that are carried out. Therefore, in order to eliminate the use of these weapons contributing to world peace and security, the Comprehensive Nuclear-Test-Ban Treaty (CTBT) is created, which with 178 signatures and 144 ratifications is one of the instruments with more received accessions; The reason for this support is clear: prohibit and prevent nuclear test explosions. However, it is necessary to review specific cases such as the Democratic People's Republic of Korea in terms of the applicability of this international instrument and the conduct of nuclear tests in the last five years.