Hi, Due to the failure reported in https://bugs.webkit.org/show_bug.cgi?id=202041 which I am investigating, I was attempting to add a test run of stress/regexp-unicode-surrogate-pair-increment-should-involve-length-check.js with the option --useRegExpJIT=0 Unfortunately simply adding //@ requireOptions("--useRegExpJIT=0"), makes all the tests on the file use the option instead of using the option as an addition to what was already running. Is there currently a way to say, in addition to the tests you're already running, try running with this option X? Also, is there in general any documentation on the /test language/ one can use in test headers? i.e. after //@? See http://llvm.org/docs/TestingGuide.html#constraining-test-execution for an example of such documentation. Thanks, -- Paulo Matos