My espresso tests fail because of interstitial ads

I am new to Firebase / Test-Lab. I was trying to use Firebase Robo and Instrumentation test. During robo tests, interstitial ads are not problem because Firebase Robo test takes back action in this situation but during Espresso test, my test fails because of interstitial ads. Is there any way to prevent interstitial ads during espresso test or pressing back when test codes realize interstitial is came?

Thanks.