The real test is smarter, quicker, more complex, and more difficult. You should gain more skills in each component of English (listening, writing, reading, and speaking). Reading books in English, listening to story-based English films, and speaking in English with those who would give attention to your needs may help you. If your current practice test score is between 115–125, then, a probable score may be a bit lower or further lower in the actual test. After all, you need to practice a lot of precision typing on the keyboard. All the best.