What is the issue I’m unable to understand? Anybody help me or ping me to this post if it’s available already.
It’s hard to write test cases that catch all possible errors. One class of errors that is frequently missed is hard-coding parameters or referencing global variables in such a way that you pass the tests because you directly reference the same data. But then the grader uses different global variable to pass to your routines …
Also note that it’s little unclear which assignment you are talking about. If you mean the conv_forward or pool_forward sections of the Week 1 Step by Step exercise, note that the test cases in the notebook do not catch the error of not taking the stride into account.
If applying the above ideas doesn’t get you there, let us know.