Before: call ale#assert#SetUpLinterTest('robot', 'rflint') let b:rflint_format = ' --format' \ . ' "{filename}:{severity}:{linenumber}:{char}:{rulename}:{message}" %s' After: call ale#assert#TearDownLinterTest() unlet! b:rflint_format Execute(The rflint command callback should return default string): AssertLinter 'rflint', \ 'rflint' \ . b:rflint_format Execute(The rflint executable should be configurable): let g:ale_robot_rflint_executable = '~/.local/bin/rflint' AssertLinter '~/.local/bin/rflint', \ '~/.local/bin/rflint' \ . b:rflint_format