Yes, you can reschedule your Ontario G test without losing your booking, provided you do so at least 48 hours before your scheduled appointment. Rescheduling within this timeframe allows you to change your date or location without penalty or forfeiting your test fee. You can do this online through the DriveTest website or by calling their customer service. However, if you try to reschedule less than 48 hours before your test, you risk losing your spot and may need to pay again. It’s advisable to act quickly if you know you can’t attend your original appointment, as rescheduling early gives you more options and ensures you retain your payment and place in line.