Do you know if they will deny you from boarding an airplane if you can't show any negative covid certificate?
The drugstores sell also "self covid test" But you don't get any certificate because you do it yourself. I don't know if you could use that instead.
Those PCR test are extremely expensive for people like me. It's just a random taxation in my opinion.
Be careful with those self tests. They have been suspended in some countries due to being contaminated with toxins. These tests originate in Korea.