I did a quick search in the GWJ database and I don't see this mentioned anywhere. It's a few years old now but still going strong and I don't think anyone has fully solved them yet. It's not actually a "test". It's a series of puzzles that require ... "lateral thinking". If you are fan of puzzles check it out here (www.timtang.com). He asks you to make a free login just so that it can track your progress.
You are given an image to look at, a title for the puzzle, a blurb of text below each picture, and an answer box to type in the answer. Answers contain no capitals and no spaces. Type in your answer. If you are right, it changes to the next puzzle. If it is wrong it will respond with "Incorrect answer" and bring you back. If you are wrong but close, some puzzles respond with a "you were close" style message.
You start with "traditional" puzzles but can switch back and forth to "toddler" puzzles when you get stuck. Don't let the category name fool you, they are not baby puzzles either. Other categories will become available as you progress.
Currently I am on Tradional #27 and Toddler "r".
We can discuss our progress through the puzzles here but please follow these rules:
#1 DO NOT POST ANSWERS TO ANY OF THE PUZZLES not even with spoilers tags!
#2 IF you post a hint please be sure to use spoiler tags and check that it does not contain anything too specific or reference how to solve other puzzles.
If you get completely stuck, PM me and I can offer HINTS to any puzzle I have already done. I will NOT give you the answer though.