There is no government language test. There are government-funded language classes, and one would need to complete a course to receive the certificate indicating completion. There is a placement test to determine which level class one should take, but that placement test is not acceptable proof of language knowledge.
As @Quink is a native speaker they would probably be assessed at having skills beyond what is offered in those classes, so would not have been able to take the class (and in the unlikely event the course organizers permitted it: it would have been terribly boring for someone who's fluent, and would have taken something like 12-16 weeks rather than the 25 days that waiting for the test results did).
