Take your word for it

To “take your word for it” means to believe what someone says without verifying or investigating it yourself. So these are the testing requirements: as you may have guessed, the countries don’t just “take your word for it.” When it comes to COVID testing requirements, countries do not just believe you without verifying it. If a mechanic says that you need to repair several things for your vehicle, if you don’t know much about cars, you might just “take his word for it.”