Api and Microservices - Url Shortner project

Hi

I am unable to complete all the test cases. The test for invalid url is failing. However I have use URL and Dns module to validate the url but test is not being passed.
My project link is here:
solution: https://shortit-fcc.herokuapp.com

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36.

Challenge: URL Shortener Microservice

Link to the challenge:

Code for api is as per below:

app.post('/api/shorturl', async function(req,res){
  const fullUrl = req.body.url;

  try {
    const myURL =  new URL(fullUrl);
    dns.lookup(myURL.host,async (err,address,family)=>{
      if(err){
        res.json({error: 'invalid url'});
      }
      const record = new UrlShort({original_url:fullUrl});
  await record.save();
  //console.log(record);
  res.json({original_url:record.original_url,short_url:record.short_url})
    })
    
  } catch (error) {
    //console.log(error);
    res.json({error: 'invalid url'});
  }
  
});

You should validate the url base on the correct format.