Grails and unit testing - uncheck "Add --classpath:..." by default?

I find that I have to uncheck this every single time for each new unit test I'm trying to run via IJ. Is there a better way? Leaving it checked results in the test failing to run properly.

I'm using Grails 2.0.1 and IJ 12.1.6 on OS X 10.8.5.