Before: call ale#assert#SetUpLinterTest('terraform', 'tflint') After: call ale#assert#TearDownLinterTest() Execute(The default command should be correct): AssertLinter 'tflint', ale#Escape('tflint') . ' -f json %t' Execute(The default executable should be configurable): let b:ale_terraform_tflint_executable = 'asdf' AssertLinter 'asdf', ale#Escape('asdf') . ' -f json %t' Execute(Overriding options should work): let g:ale_terraform_tflint_executable = 'fnord' let g:ale_terraform_tflint_options = '--whatever' AssertLinter 'fnord', ale#Escape('fnord') . ' --whatever -f json %t'