Before: call ale#assert#SetUpLinterTest('pony', 'ponyc') After: call ale#assert#TearDownLinterTest() Execute(The options should be used in the command): AssertLinter 'ponyc', ale#Escape('ponyc') . ' --pass paint' let b:ale_pony_ponyc_options = 'foobar' AssertLinter 'ponyc', ale#Escape('ponyc') . ' foobar'