A much-improved defensive effort helped Papua New Guinea outclass Fiji 26-0 in their second and final rugby league test in Port Moresby.
The win atoned for last week's shock 26-12 defeat in Mount Hagen and ensured the Kumuls claimed the series honours on points differential.
Kumuls coach Adrian Lam criticsed his side's high error rate last week and says while things have improved there's still a long way to go.
"We did still make some errors, some uncharacteristic errors. Our error rate was pretty high but we just defended a lot better and those errors were made in better field position. We've still got a lot to work on as a nation moving forward but the defence today was just outstanding, it was just fantastic and very aggressive and passionate."
Fiji Bati coach Joe Rabele says poor ball security cost them.
I think 90 percent of the time we were defending. We just dropped so many balls - all of the drops of the ball they capitalised and turned into points. We didn't recover from the loss of the ball last week they dropped many balls and we capitalised on that and scored points. This week it was the other way around.