No-one seems to have a clear idea of what you are trying to do.
Let's take a much simple example.
Tom is running. Is 'Tom running' the phrase that you want?
And I'd like to consult Clive about the "for" in «Testing for the system is still outstanding.»
What does it mean? Is it "testing of the system"? Yes. The 'for' suggests that there is some 'obligation' to test the system, that the system needs to be tested.
With regard to the word 'outstanding', if something is 'outstanding', it can mean that it has not yet been dealt with, is not yet completed.
eg 'Tom's bill is outstanding' means that Tom has not yet paid it.
Best wishes, Clive