Tests dont execute if KarmaTestAdapter.json is locked

[fntc]

I'm currently working on an Angular-Typescript Project which I have written some unittests for. I started testing with grunt and karma but now I'm using the KarmaTestAdapter as an easier way to see if my tests still pass. My Project gets checked in to a Team Foundation Server because the company needs other developers to access the project later on. TFS locks files that have been checked in by write-protecting them on filesystem-level. Now the Bug: Is the KarmaTestAdapter.json file is locked (write-protected) the Adapter won't run any of my test (which wouldn't be that bad) but also displays the last results (i.e. all success when some are broken)