Ran 35 tests: 35 passing and 0 failing all tests apparently successful Using alisp -q -batch Ran 35 tests: 35 passing and 0 failing all tests apparently successful Using mlisp -q -batch Ran 35 tests: 35 passing and 0 failing all tests apparently successful Using /Users/rpg/ccl/dx86cl64 --no-init --quiet --batch Ran 35 tests: 35 passing and 0 failing all tests apparently successful Using clisp -norc -ansi -I -on-error exit Ran 35 tests: 35 passing and 0 failing all tests apparently successful Using ecl -norc -load sys:cmp Ran 35 tests: 34 passing and 1 failing failing test(s): run-shell-command-test.script Using sbcl --noinform --userinit /dev/null --sysinit /dev/null --disable-debugger Ran 35 tests: 35 passing and 0 failing all tests apparently successful I.e., only ECL is failing any of the scripts. That's actually more a bug with my test --- ECL will never be able to capture STDERR. Attached is a proposed test modification. r P.S. I have a dead-simple perl script that cycles through a configurable set of lisp impementations, running all the tests. If I can get it tidied, I will make it publicly available.