There is some Quality of Life coming in the update later today:

Mastery Rank Test Changes

Mastery Rank Tests no longer make you wait 24 hours upon failing an attempt – meaning you can continue with Mastery Rank test attempts until you succeed. The cooldown timer remains for successful attempts, but we’ve reduced it from 24 to 23 hours.

We’ve also changed the Mastery Rank test “Practice” prompt in Cephalon Simaris’ Relay Room to “Replay”. 

• Since you can attempt without a time penalty, there is no real need to practice ahead of time. However, tests remain available to replay in case you would like to revisit them for old time sake. 
• Upcoming Mastery Rank tests will now indicate the amount of Mastery XP required to access it.
• Mastery Rank Test Changes

Mastery Rank Tests no longer make you wait 24 hours upon failing an attempt – meaning you can continue with Mastery Rank test attempts until you succeed. The cooldown timer remains for successful attempts, but we’ve reduced it from 24 to 23 hours.