How to make sure users take tests in order

Hello,

I am trying to make it so that the applicant takes Test 1 first, then 2 and 3. I don't want the user to be able to randomly select which test they take. I'm not sure how to disable the 2nd and 3rd test. All tests are disabled once taken. I can't submit the actual file due to client confidentiality, but I'll post a sample. Each test when taken takes the user to a scene within the file to complete the test. Any feedback is welcomed, thanks.