Zagreb Tourist Board published on it's website a list of Public institutions and Private Operators, as well of Zagreb Hotels which are offering COVID-19 testing service for tourists who visit Croatia and the Croatian capital Zagreb.
All foreign tourists in Zagreb or other visitors who have spent at least one night in the Croatian capital will be able to be tested for the novel coronavirus on Saturdays, Sundays and on holidays (with prior notice), via Zagreb Tourist Board’s Visitor Centre at the address Trg bana Josipa Jelačića 11 (Jelačić Square).
Zagreb Tourist Board
COVID-19 - Info
COVID-19 Testing at Public institutions and Private Operators
COVID-19 Testing in Zagreb Hotels
Foreign Visitor COVID-19 Testing at Weekends