Running tests from visual studio code not working

I made a very simple testcase to make sure everything is working:

import Toybox.Lang;
using Toybox.Test;

(:test)
function testTrueEqualsTrue(logger as Test.Logger) as Boolean {
    logger.warning("warning");
    logger.debug("debug");
    logger.error("error");
    return 42 == 42;
}

When trying to run this from Visual Studio Code command pallet (ctrl + shift + p => Monkey C: Run Tests) the program compiles, starts a simulator, but then crashes the simulator. It will just say that the simulator is 'not responding', while not every finishing this simple test. What do I do wrong here?

The program does actually compile and run normally, just not the tests. I use Ubuntu and the 8.4.0 connect iq sdk. I tries a few different devices for the tests, but all of them fail.