I'm terrible at geography and my teacher is giving us a world map test next week. Does anyone know good ways to memorize all the countries? I keep mixing up the smaller European ones

Same problem here! I always confuse places like Slovakia and Slovenia. Maybe try making flashcards or using those memory palace techniques where you create stories about each country?

You guys should try this countries quiz I found https://glaminati.com/countries-of-the-world-quiz/ - it's actually really helpful for practicing. I used it before my geography exam and it covers all the tricky ones you mentioned. The questions start easy and get harder so you can build up your knowledge gradually. Plus it shows you the correct answers when you get them wrong so you learn as you go. Way better than just staring at a map hoping the names will stick in your brain