Error: jest-haste-map: Haste module naming collision:

Question

I have created a custom npm module (will use xxx instead of its name) and link it manually using npm install.

I tried very har

Answer 1

Add rn-cli.config.js In the root project

const blacklist = require('metro-config/src/defaults/blacklist');
module.exports = {
 resolver: {
    blacklistRE: blacklist([
        /node_modules\/.*\/node_modules\/react-native\/.*/,
    ])
 },
};

see this issue

Hope it works for you