North Korean leader Kim Jong-un probably wants to test the United States' commitment to any nuclear deal when he meets with U.S. President Donald Trump next week, a former U.S. envoy said Tuesday.

Trump and Kim are set for a historic summit in Singapore next Tuesday, a meeting that will focus on dismantling North Korea's nuclear weapons program in exchange for security guarantees for the regime.

"I believe he wants the summit to see the seriousness on the U.S. side," Joseph Yun, former U.S. special representative for North Korea policy, said at a congressional hearing.

His remark comes amid lingering skepticism about Kim's intent to give up a nuclear program that took decades to build and on which the regime has staked its survival.

Source: Yonhap News Agency