Spain has said it hopes to open up to overseas travellers from June, as plans for an EU-wide digital certificate go before the European Parliament.
Tourism minister Fernando Valdés said a pilot test would take place in May so that Spain would be ready to receive travellers the following month.
The EU has been working on a digital pass in time for the summer holidays.
It would cover anyone who is either vaccinated against Covid-19, has a negative test or recently recovered.
Several countries have already begun using digital or paper passes to help ease local lockdowns.
Mr Valdés told a travel conference in Mexico his country would be "ready in June to tell all travellers worldwide that you can visit us". However, any scheme to open up to non-European tourism would be dependent on the EU's digital green certificate and Mr Valdés said it was not a magic wand.
In a debate ahead of Wednesday's vote in the EU Parliament, EU Justice Commissioner Didier Reynders warned of the possibility of "fragmentation across Europe" if an agreement on a joint pass could not be reached.
"We would risk having a variety of documents that cannot be read and verified in other member states. And we risk the spread of forged documents, and with it, the spread of both the virus and the mistrust of citizens," he said.
Dutch MEP Jeroen Lenaers stressed that the proposed system would ensure "full equality and avoids discrimination between those who have been vaccinated and those who have not" by allowing travel to people who had tested negative or had recovered from the virus.
However, questions remain about how long immunity lasts after an infection and whether further jabs are needed amid the rapid spread of more contagious Covid variants.
Other issues include what data would be used to prove an individual was not infected with coronavirus and privacy concerns.
Source: BBC
