describe('9999', function () {
  it('should have status code in axios error', async function () {
    const instance = axios.create({
      baseURL: "https://postman-echo.com",
      adapter: "fetch",
    });
    try {
      await instance.get("/status/400");
    } catch (error) {
      assert.equal(error.name, "AxiosError");
      assert.equal(error.isAxiosError, true);
      assert.equal(error.status, 400);
    }
  });
});

$ npx mocha test/unit/regression/bugs.js


  issues
    4999
      ✔ should not fail with query parsing (235ms)
    5028
      ✔ should handle set-cookie headers as an array
    9999
      1) should have status code in axios error


  2 passing (750ms)
  1 failing

  1) issues
       999
         should have status code in axios error:
     AssertionError [ERR_ASSERTION]: undefined == 400
      at Context.<anonymous> (file:///Users/herman/Documents/github/axios/test/unit/regression/bugs.js:55:16)
      at process.processTicksAndRejections (node:internal/process/task_queues:105:5)