Mocha run tests twice

[Lukasz Dutka]

I have a large TDD driven project written in coffeescript. So the test files are written in coffee as well. For debuging purposes etc. I'm using filewatchers in Webstorm which generate .js and .map files from .coffee scripts. 

Unfortunatelly I cannot filter out in params files matching only to .coffee or .js pattern. In consequence all my tests are run twice. 

Is there a way how to filter out that? -R spec test/*.js is not working for me becouse it's not compatible with --recursive option and when I use that option only main directory tests are executed.

Any idea how to solve that?

Regards

Lukas