I am trying to automatically evaluate code under BSL. The Scheme Sandbox has support for specifying BSL as the language, but somehow it's not behaving as I would expect. Welcome to DrScheme, version 4.2 [3m]. Language: Module. > (require scheme/sandbox) > (define e (parameterize ([sandbox-output 'string]) (make-evaluator '(special beginner) "7 (check-expect (id 1) 1) (define (id x) x)"))) 7 > (get-output e) "" > I would expect the 7 to appear in the string that results from GET-OUTPUT, followed by a newline, then "The test passed!" I am using calling MAKE-EVALUATOR wrong? I should be using some other library, such as lang/run-teaching-program ?