Twilio SMS Twiml with Test Credentials

I'm using twilio with the test credentials and I send a simple sms from the test number +15005550006 to my twilio number. When I execute it I get an sid. On my twilio number I have set up a request url to receive the twiml request but it never gets hit. I'm able to access that url from the internet (not localhost) myself but never when sending a test sms.

Since I am using test credentials, is twilio sending a request to my url? And is there a way to see from the twilio report/alert to see if it is actually trying to connect to that url?