Before: Save g:ale_json_jq_executable Save g:ale_json_jq_options After: Restore Execute(The jq fixer should use the options you set): let g:ale_json_jq_executable = 'foo' let g:ale_json_jq_options = '--bar' AssertEqual \ {'command': ale#Escape('foo') . ' . --bar'}, \ ale#fixers#jq#Fix(bufnr(''))