Node.js: v14.15.2 yargs-parser: v20.2.7 ```js const yargsParser = require('yargs-parser'); const opts = { string: ['asd'], configuration: { 'boolean-negation': false, 'camel-case-expansion': false, 'unknown-options-as-args': true, }, }; console.log(yargsParser('--no-asd2 123', opts)); // { _: [ '--no-asd2', 123 ] } console.log(yargsParser('--no-asd 123', opts)); // { _: [], 'no-asd': 123 } ``` Is it correct behaviour? Because of `'boolean-negation': false` I was expecting similar output `{ _: [ '--no-asd', 123 ] }`. --- Fixed that by adding `'negation-prefix': Math.random().toString(36).slice(2)` to configuration. But that would be better to fix it under the hood :) Thanks! --- UPD: even `'negation-prefix': ''` works fine.