You can create a Test A that would be the original key. Then you can clone this and rename Test B and add your standard that you want for one week. Then you can clone Test A again and call it Test C and add your next set of standards and scan.
If you do not care to keep any data from each test, you can just create Test A and add the standards, scan and then when you are ready for the second set of standards just edit Test A and overwrite the first scans.
If you want to keep the data, you will want to do the first suggestion.
Let me know if you have any other questions.