C4 W1 A1: Tests failed on 1 cell(s)!

My submission only gets 75/100 even though it passes all the tests. I have tried starting from a clean copy and transferring over my code but that doesn’t work and don’t use any global variables inside the functions. I have no idea which test the grader is failing. The grader output is:

[ValidateApp | INFO] Validating ‘/home/jovyan/work/submitted/courseraLearner/W1A1/Convolution_model_Step_by_Step_v1.ipynb’
[ValidateApp | INFO] Executing notebook with kernel: python3
Tests failed on 1 cell(s)! These tests could be hidden. Please check your submission.

Any ideas how I determine which test is failing?

Hi Jason_Fackler,

Unfortunately the public tests do not detect all errors. If you want, feel free to send me your notebook with a direct message so I can have a look.

I’m facing the same issue. Anyone knows how to fix this?

The most common error here is not implementing the stride in either conv_forward or pool_forward or both. The tests in the notebook do not catch that error. Take a careful look at your output values for the stride = 2 test case for pool_forward: they all need to match, not just most of them. But the bug in the test cases is that they don’t “throw” even if you get some values wrong.