Before: Save g:ale_vim_vint_executable unlet! g:ale_vim_vint_executable runtime ale_linters/vim/vint.vim let b:command_tail = (has('nvim') ? ' --enable-neovim' : '') \ . ' -f "{file_path}:{line_number}:{column_number}: {severity}: {description} (see {reference})" %t' call ale#semver#ResetVersionCache() After: Restore call ale#linter#Reset() call ale#semver#ResetVersionCache() unlet! b:bin_dir unlet! b:executable Execute(The default command should be correct): AssertEqual 'vint', ale_linters#vim#vint#GetExecutable(bufnr('')) AssertEqual \ ale#Escape('vint') .' --version', \ ale_linters#vim#vint#VersionCommand(bufnr('')) AssertEqual \ ale#Escape('vint') .' -s --no-color' . b:command_tail, \ ale_linters#vim#vint#GetCommand(bufnr(''), []) Execute(The executable should be configurable): let g:ale_vim_vint_executable = 'foobar' AssertEqual 'foobar', ale_linters#vim#vint#GetExecutable(bufnr('')) AssertEqual \ ale#Escape('foobar') .' --version', \ ale_linters#vim#vint#VersionCommand(bufnr('')) AssertEqual \ ale#Escape('foobar') .' -s --no-color' . b:command_tail, \ ale_linters#vim#vint#GetCommand(bufnr(''), [])