When we decided to move to France, one of my quiet anxieties was the unknown. Back in Texas, I know the drill — wild boars, venomous spiders, scorpions, snakes, tornadoes, hurricanes. I’ve got a playbook for all of it. But France? What hazards might be lurking here that I wouldn’t even think to Google?

Last week, I got my answer. And naturally, I’m passing it straight on to you.

If you’re deep into your move-to-France research, you may already know that Americans from certain states can exchange their driver’s license for a French one—no test.