Before: call ale#assert#SetUpLinterTest('html', 'djlint') After: call ale#assert#TearDownLinterTest() Execute(The default djlint command should be correct): AssertLinter 'djlint', ale#Escape('djlint') . ' %s' Execute(The executable should be configurable): let g:ale_html_djlint_executable = 'foo bar' let g:ale_html_djlint_options = '--option' AssertLinter 'foo bar', ale#Escape('foo bar') . ' --option %s'