North Korean leader Kim Jong Un oversaw a successful static motor test firing for a “multi-stage solid-propellant rocket motor to be loaded in an intermediate-range hypersonic missile,” according to state media on Wednesday.

The Rodong Sinmun said the test occurred Tuesday morning and afternoon at the Sohae Satellite Launching Ground in the northwest of the country.

Kim reportedly said the test helped “confirm the timetable for completing” the missile system, adding the weapon is “just as important as an intercontinental ballistic missile (ICBM)” and that “the enemy knows this well.”

North Korea said it tested a solid-fuel “hypersonic” intermediate-range ballistic