"cwd" setting in launch.json breaks test result visualisations

[TheSlowGrowth]

When the "cwd" property is defined for a launch configuration in launch.json, the test output in the test panel breaks: After tests have been run, no red crosses or green ticks appear next to each test in the list.

[dietelTiMaMi]

I've just stumbled upon the same issue.
Running the test without cwd will prevent it from running all together.

[dietelTiMaMi]

This is the same as issue #44 which is already resolved py pullrequest #45