As you probably recall, in Europe last summer Celebrity was testing passéngers at the cruise terminal before boarding. They did the same for all passengers boarding the TA in Barcelona. We had our boarding time, which appeared to be strictly enforced, went through one stage of check-in, sent to testing, got tested, then sent to a specific section of the terminal to wait for results. Once we had the results and had been given our green sticker, we boarded. All 1200 passengers were then tested after our 3 mainland Spanish ports on the sea day before arriving in the Canary Islands; you had to sign up for a time (this could be done by scanning a QR code in Celebrity Today or at a desk in the Guest Services lobby. Testing was done in the Meeting Place and was extremely organized since numbers for each time slot were limited. Same exact process for the last sea day before disembarking, except all 1100 crew were also tested that day. Again, very smooth.