How to set “CHROME_BIN” env variable on cloud9 IDE when running react.js app


I set my karma.conf.js, installed dependencies properly and after I “npm test” on my cloud9 IDE, react app I got the error: ‘No binary for Chrome browser on your platform. Please, set “CHROME_BIN” env variable.’

This answer and all realted doesn’t resolve my error?

Can anybody give me a hint please?