Before: call ale#assert#SetUpLinterTest('vhdl', 'xvhdl') After: call ale#assert#TearDownLinterTest() Execute(The default xvhdl command should be correct): AssertLinter 'xvhdl', ale#Escape('xvhdl') . ' --2008 %t' Execute(The xvhdl executable and options should be configurable): let b:ale_vhdl_xvhdl_executable = 'foobar' let b:ale_vhdl_xvhdl_options = '--something' AssertLinter 'foobar', ale#Escape('foobar') . ' --something %t'