ICST 2019 is the 12th International Conference on Software Testing, Verification and Validation that will take place in Xi’an, China on 22-27 April 2019. ICST 2019 will feature keynote addresses from renowned academia and industry scientists, several tracks, including Research, Industry, Testing Tool and Poster Tracks, a PhD symposium, and a Tools Demo track, as well as numerous workshops and co-located events. All the submitted research papers have undergone a rigorous double-blind review process and acceptance was based on quality, originality and relevance. The conference proceedings will be submitted for publication in IEEE Xplore. Exactpro’s ClearTH Test Automation Framework for DLT-Based Post-Trade Systems demo will be presented in the Demo Track on 24 April 2019.