Not quite yet but you can never say never on this matter
It is the first sort of weapons test conducted by North Korea since talks broke down between Trump and Kim in Vietnam at the end of February. There's no actual proof that this is some sort of long-range missile but the fact that Kim was there to oversee it certainly holds some significance that we could potentially start seeing things shift back to the good ol' nuclear testing days before. Though odds of that happening remain rather minuscule for the time being.
But perhaps this is more of warning shot to the US as well with North Korean authorities trying to signal that they certainly aren't the ones under pressure despite sanctions being levied against them.
For now, markets can shrug off the earlier report and need not worry too much of a major change in sentiment on the North Korea vs US rhetoric. However, you can never really rule out North Korea risk completely. They're still an enigma to the world so it's always best to just keep abreast of developments in the country if you're watching risk assets.