PhantomJS teamcity config

In a teamcity config I have build step which runs PhantomJS tests. It is a "Command Line" step with custom script. The script looks like:

%PhantomJS% CreateEntityPopupTest\unit.htm
%PhantomJS% ExcelImportPopupTest\unit.htm
... etc.

So it runs each qunit test package mentioned in the htm page. But I didn't manage to find a way to point PhantomJS (phantomjs-1.9.0-windows) to a folder, not to a single file. So there would be no need to change the config each time when we add new files with tests.