Duplicate Content-Length with Axios running in NodeJS/JEST - jestjs

Question

I face really weird problem with Axios / nanoexpress. I started to write JEST test and copied working piece of code from Vuex that calls my backend. This code works reliably in Vue but here it fails with a network error. The Axios version is the same on both SPA and JEST test.
JEST:
let response = await axios.get(`${API}/users/1234`, getAuthHeader());
function getAuthHeader() {
const config = { headers: { } };
config.headers.Authorization = "bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VySWQiOiIxZTQwdjBiMWo1Iiwibmlja25hbWUiOiJsaXRlcmFrbCIsInB3ZFRpbWVzdGFtcCI6IjIwMjAtMDMtMjJUMTE6MTA6NDkuNDg2WiIsInJvbGVzIjpbImFkbWluOnBvbGwiXSwiaWF0IjoxNTg2NjkwNzc2LCJleHAiOjE1ODkzNjkxNzZ9.N5MfpZ9i9Sjv-izdYItR4gXCmzVkqkuVcVSEL_6Q89c";
return config;
}
When I remove the config with Authorization header, the code works well:
let response = await axios.get(`${API}/users/1234`, getAuthHeader());
This is the error:
Network Error
at createError (node_modules/axios/lib/core/createError.js:16:15)
at XMLHttpRequest.handleError (node_modules/axios/lib/adapters/xhr.js:83:14)
at XMLHttpRequest.<anonymous> (node_modules/jsdom/lib/jsdom/living/helpers/create-event-accessor.js:33:32)
at innerInvokeEventListeners (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:316:27)
at invokeEventListeners (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:267:3)
at XMLHttpRequestEventTargetImpl._dispatch (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:214:9)
at fireAnEvent (node_modules/jsdom/lib/jsdom/living/helpers/events.js:17:36)
at requestErrorSteps (node_modules/jsdom/lib/jsdom/living/xhr-utils.js:121:3)
at Object.dispatchError (node_modules/jsdom/lib/jsdom/living/xhr-utils.js:51:3)
at EventEmitter.<anonymous> (node_modules/jsdom/lib/jsdom/living/xmlhttprequest.js:675:20)
at Request.<anonymous> (node_modules/jsdom/lib/jsdom/living/xhr-utils.js:384:47)
at Request.onRequestError (node_modules/request/request.js:877:8)
console.error node_modules/jsdom/lib/jsdom/virtual-console.js:29
Error: Error: Parse Error: Duplicate Content-Length
at Object.dispatchError (C:\Users\leos\WebstormProjects\nano-options\node_modules\jsdom\lib\jsdom\living\xhr-utils.js:54:19)
at EventEmitter.<anonymous> (C:\Users\leos\WebstormProjects\nano-options\node_modules\jsdom\lib\jsdom\living\xmlhttprequest.js:675:20)
at EventEmitter.emit (events.js:327:22)
at Request.<anonymous> (C:\Users\leos\WebstormProjects\nano-options\node_modules\jsdom\lib\jsdom\living\xhr-utils.js:384:47)
at Request.emit (events.js:315:20)
at Request.onRequestError (C:\Users\leos\WebstormProjects\nano-options\node_modules\request\request.js:877:8)
at ClientRequest.emit (events.js:315:20)
at Socket.socketOnData (_http_client.js:486:9)
at Socket.emit (events.js:315:20)
at addChunk (_stream_readable.js:297:12) undefined
The service is nothing fancy and it is never called when Authorization header is present and it is called when the Authorization header is missing.
app.get('/v1/users/:userId', async (req, res) => {
console.log("getUser handler starts");
const response = {};
res.send(response);
return res;
});
I have spent several hours trying to see the raw network communication but failed. It must be something with Axios because I can run successfuly exactly the same request with the Authorization header from Postman.
Update:
it seems to be related to NodeJS version. I submitted an issue: https://github.com/axios/axios/issues/2889
Update 2:
I switched from Axios to Got and the test is working properly. https://github.com/literakl/mezinamiridici/commit/e667c5661429fc8cba273716dfced2244e211abf