Before: call ale#assert#SetUpLinterTest('c', 'cppcheck') let b:command_tail = ' -q --language=c --enable=style %t' After: call ale#assert#TearDownLinterTest() unlet! b:command_tail Execute(The executable should be configurable): AssertLinter 'cppcheck', ale#Escape('cppcheck') . b:command_tail let b:ale_c_cppcheck_executable = 'foobar' AssertLinter 'foobar', ale#Escape('foobar') . b:command_tail Execute(cppcheck for C++ should detect compile_commands.json files): call ale#test#SetFilename('cppcheck_paths/one/foo.cpp') AssertLinter 'cppcheck', \ ale#path#CdString(ale#Escape(ale#path#Simplify(g:dir . '/cppcheck_paths/one'))) \ . ale#Escape('cppcheck') \ . ' -q --language=c --project=compile_commands.json --enable=style %t'