Commuters will now have to bring cards to ride buses in Seoul city.
Seoul Metropolitan City government announced the test operation on Sunday which will see them get rid of fare boxes from buses starting October.
Fare boxes on one-hundred-71 buses across eight lines will be removed, until March next year.
That's around 2.4 percent of the total number of buses running in the city.
The city will install mobile QR codes at stations which will allow travelers get their digital bus cards.
Officials expect the measure to reduce the risk of virus infections through cash transactions and improve traffic safety as drivers would no longer need to manage the boxes.
They will review the results before deciding whether to fully adopt the all-digital fare system.