Before: Save b:ale_groovy_npmgroovylint_options call ale#assert#SetUpLinterTest('groovy', 'npmgroovylint') call ale#test#SetFilename('test.groovy') After: Restore call ale#assert#TearDownLinterTest() Execute(The default npm-groovy-lint command should be correct): AssertLinter 'npm-groovy-lint', \ ale#Escape('npm-groovy-lint') . ' --failon none --output json --loglevel warning %t' Execute(Default options should be configurable): let b:ale_groovy_npmgroovylint_options = '--loglevel info' AssertLinter 'npm-groovy-lint', \ ale#Escape('npm-groovy-lint') . ' --failon none --output json --loglevel info %t'