Is there a limit to the number of times I can take the Registration Test or Rank-Up Test?

When you failed a test, it is possible for you to retake it as many times as you want after a certain period of time has passed.

The time period required to retake a test is as follows:
– For Registration Test: after 1 hour
– For Rank-Up Test: after 1,440 hours (60 days)