Before: call ale#assert#SetUpFixerTest('apkbuild', 'apkbuild-fixer') After: call ale#assert#TearDownFixerTest() Execute(The apkbuild-fixer callback should return the correct default values): AssertFixer { \ 'read_temporary_file': 1, \ 'command': ale#Escape('apkbuild-fixer') . ' -p apkbuild-lint %t', \} Execute(The apkbuild-fixer callback should include custom apkbuild-fixer options): let g:ale_apkbuild_apkbuild_fixer_executable = "another-apkbuild-fixer" let g:ale_apkbuild_apkbuild_fixer_options = "-s" AssertFixer { \ 'read_temporary_file': 1, \ 'command': ale#Escape('another-apkbuild-fixer') . ' -p apkbuild-lint -s %t' \}