The development team are supposed to do SOME testing, even if it is testing each other's work!

As a former developer, I am in the 'Poacher turned Gamekeeper' role.

On one project, a few years ago, I asked to see the actual test output, and was handed a Word document into which the developers had typed what they thought their program had (or should have) produced. Needless to say, it was completely wrong, as was the code. A UNIX application, it had been run in a non-standard environment, and wouldn't even run in the correct environment. It got returned to them as unfit to test.

(Sometimes the released code won't even COMPILE.)