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I hope this message finds you well, present circumstances excluded. I am a licensed attorney with over a dozen years of driver license related legal experience. It is a pleasure to assist you today.
The answer to your question is no, you will not have to re-submit to another written test or driving test. However, you will likely have to provide a physician's note that you are capable of safely driver to the MN DMV. As a matter of fact, you should go ahead and get that letter put together by your treating physician to provide at the meeting that you will attend about your license.
Here is some helpful information about diabetes and driving in MN: https://dps.mn.gov/divisions/dvs/forms-documents/Documents/MedicalConditions_and_YourLicense.pdf
Let me know if you have any other questions or comments.
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Best wishes going forward (and this is all going to work out - don't worry).