A click test 5 seconds is not at all different from the 1 second or 2 seconds test of CPS. Other things remaining constant, the time interval here for clicking is of exactly 5 seconds. It is often preferred by players who have little time for practicing but want to practice better than just jitter clicking for a second or two. This click test 5 seconds long is very similar to the kohi click tester and gives you a better idea of your clicking capability and you can make the right decisions and take steps as to what you want to improve in your clicking.
It also helps the players to take rest between long intervals of clicking and does not pose a threat of injury to the hand of the player. The injury is usually the result of excessive clicking.
Excessive clicking happens in 1 and 2 second tests as well because they are short and addictive. The player disregards the time while practicing away more than 30 to 40 sessions in one go.
The 5 seconds click test gives enough time to practice as well as to rest. It is often considered ideal for practicing by many hardcore players of Minecraft and other computer games.