Course 1 Week 4 PA1 Received 90/100, although passed all tests

I cleared all the tests on the notebook, but still got 90/100

Can you please check and suggest, which 1 cell is falling and elaborate on the error?

Thanks

The tests in the notebook cannot catch all possible errors, so there’s a bug in your code somewhere. But it is unfortunate that the grader can’t even tell you where to look. Trust me, we have complained about this to the course staff, but apparently it is a limitation of the underlying Coursera grading platform and not so easy to fix.

Also note that no-one but the Course Staff can actually look at your notebooks. I will contact you by DM to suggest how we can move forward here.

Thanks a lot for the reply. It is indeed unfortunate.

Anyhow, I will wait for the DM