We have integrated invisible recaptcha in one of our websites. Whenever we submit the form it automatically submits.
I read in some google groups that we would get
Invisible recaptcha check fails if you try to access your page via automated tests (in my case chrome browser) since chrome has a feature to recognize if the browsers is controlled by such software... so try to create easy tests in Python or Java(+webdriver), to see if recaptcha is implemented correctly.