In 5.5.0f3 this just worked fine! I'm basically using Unity Test Runner / Running from the command line commands per documentation. I made a shell script (test.command) that wraps up this into VS Code task.json. Then I upgraded to 2017.1.0f3, and the now no test result file generated. (the tests run fine in Unity Editor, but not in command line). Please shed me a light. For reference I put the entire project to GitHub.