For the first time, it has been possible to test laser measurement technology for LISA in laboratories almost under mission conditions. A team of researchers led by the Max Planck Institute for Gravitational Physics (Albert Einstein Institute; AEI) and the Institute for Gravitational Physics at Leibniz Universität in Hannover, Germany, achieved the breakthrough with a novel experiment. The work ties up with the LISA Pathfinder mission, which tested LISA technologies in space from 2015 to 2017. LISA is a planned observatory in space that will detect gravitational waves inaccessible on Earth. A consortium of international scientists is currently developing LISA as a mission of the European Space Agency (ESA). With their experiment, the AEI scientists demonstrate the functionality of the LISA phasemeter, which will be the central measuring unit of the observatory. Their experiment can also be easily extended for further testing and can thus verify other steps of LISA measurements observatory.