@Bravo

So just reject them if they aren't willing to work with you or they aren't able to meet the standards. You can do everything you just said without rejecting them and then asking them back because you wanted to test their character. I stand by what I said. It's a rather shitty way to go about doing things, in my humble opinion, since there's plenty of other ways of judging someone's character without resorting to bullshitting a reason to reject them even though you have every other intention to accept them. 

It's not being "evil". It's just being a dick. Say what you have to up front and be done with it. I have two games that have been around for around a year each and I have rejected several applicants for each game for a variety of reasons. The ones who remain are the ones who have proven to be good characters and capable of meeting my standards without complaint. I am more than a little familiar with what it takes to run a game and chose people who are well suited for it, so believe me when I say that there are plenty of other very effective methods a GM can use that doesn't revolve around what you're advocating. 

If you told me that I was rejected for a really silly, made up reason and then told me it was a test of my character three days later and you wanted me back, I'd refuse flat out. If you couldn't tell I'd be a dedicated and easy person to work with another way, then why would I want to participate? It's just rude.

Because this is over text, I feel like I should put a disclaimer here saying I'm not personally attacking you or saying you're an awful person, Brovo, I'm simply disagreeing with one GMing decision out of the many you obviously made that have worked for you. Healthy discussion and all that, blah blah blah, keeping it respectful and non-confrontational. I decided to edit this in because I've seen waaay too many things on the internet turn into something scrappy because text can come across as snippy or aggressive when it's not what was intended.