Thank you for the suggestion. Tweaked it a little to what you suggested.
Hope you enjoyed!

I can see what you're going for in here and it's quite a good concept but leaving the exit door open is rarely a good idea as it invites the player to attempt alternative solutions without engaging with the actual test. In this case, the player can place a portal on the other side near the turrets while falling from a high portal on the entrance side of the water, walk through their own portal and leave, everything else is optional. Players will always seek to find the easiest way out of a test chamber, you may wish to design the chamber so that this cannot be exploited.

I've got a little collection of chambers going and I'm always interested in feedback on each chamber or the collection as a whole. I'd be grateful if you'd have a look:
Elementary