Before: call ale#assert#SetUpLinterTest('ispc', 'ispc') After: call ale#assert#TearDownLinterTest() Execute(The executable should be configurable): AssertLinter 'ispc', \ ale#Escape('ispc') . ' --nowrap %s' let b:ale_ispc_ispc_executable = 'foo' AssertLinter 'foo', \ ale#Escape('foo') . ' --nowrap %s' Execute(The options should be configurable): let g:ale_ispc_ispc_options = '--foo' AssertLinter 'ispc', \ ale#Escape('ispc') . ' --nowrap --foo' . ' %s'