Well, i've got egg on my face. You reminded me that i should have prefaced my command with "cl_". When i type the whole thing, the console does accept it. However, the test campaign seems to be non functional. Clicking "Start Campaign" after that has no effect until i click on one of the standard campaigns. Additionally i get the following output in the log:
CL_GetCampaign: Campaign "test" doesn't exist.