Headless Editor Test Runner not working

Hi guys! As described in the docs

http://docs.unity3d.com/Manual/testing-editortestsrunner.html

i am trying to run few tests from the command line. The problem here is that unity open but nothing happens. I am running Unity 5.3.1f1 so I would expect a result or opening a window or whatever.

This is the command I am using:

C:\Program Files\Unity\Editor>start /WAIT Unity -projectPath "C:\dev\MyProject" -runEditorTests -editorTestsResultFile c:/RES.XML

The xml result file is even created; it's like there is no argument associated to runEditorTests and editorTestsResultFile.