Before: call ale#assert#SetUpLinterTest('vim', 'vint') let b:command_tail = (has('nvim') ? ' --enable-neovim' : '') \ . ' -f "{file_path}:{line_number}:{column_number}: {severity}: {description} (see {reference})" %t' After: unlet! b:bin_dir unlet! b:executable call ale#assert#TearDownLinterTest() Execute(The default command should be correct): AssertLinter 'vint', [ \ ale#Escape('vint') .' --version', \ ale#Escape('vint') .' -s --no-color' . b:command_tail, \] Execute(The executable should be configurable): let g:ale_vim_vint_executable = 'foobar' AssertLinter 'foobar', [ \ ale#Escape('foobar') .' --version', \ ale#Escape('foobar') .' -s --no-color' . b:command_tail, \]