Recently, the Machine Learning group at CWI has developed a method for statistical hypothesis testing that are safer and more flexible than traditional ones. While until March 2020, most work was theoretical, now the time has come to put "safe testing" to the test: in a collaboration with UMC Utrecht and Radboud UMC, our method is employed for combining results of several COVID-19 related clinical trials that are currently running in a number of hospitals in various countries.