Kairos pondered over what he could possibly do in order to test Chase. Realistically, he could think of quite a few things. However, most of them would at the very least hamper Chase's trust in him, or his teammates instead.
Most of the plans he came up with would also irreversibly shift their views of him if he decided to carry them out. There were a few that he would almost go through with, but at the end of the day, he would have to put everybody through a fake crisis.
Kairos had no plans of outright lying to the others, so if he did such a thing he was definitely going to tell them afterwards. And at that point, when they faced another crisis, there might be a seed of doubt in the back of their mind, that it might just be another test.
And that might very well be enough for them to let their guard down just a little too much, and let something terribly bad happen.
