C2_W3_Assignment_Unit tests passed but Grade deducted

Failed test case: "extra_check". Wrong weights matrix W1..
Expected:
[[-0.05350702 -0.10250995]
 [-0.07303197 -0.1295294 ]
 [-0.07487082 -0.11145172]],
but got:
[[-0.88792757 -2.15678679]
 [-0.90083658 -2.29294507]
 [-0.90485966 -2.2175348 ]].

Failed test case: "extra_check". Wrong bias vector b1..
Expected:
[[0.03448384]
 [0.03609865]
 [0.0347455 ]],
but got:
[[0.79242606]
 [0.92205182]
 [0.85903016]].

Failed test case: "extra_check". Wrong weights matrix W2..
Expected:
[[-0.39306094 -0.41154116 -0.40031599]],
but got:
[[-2.53898163 -2.75359949 -2.64586636]].

Failed test case: "extra_check". Wrong bias vector b2..
Expected:
[[-0.74585916]],
but got:
[[1.72524631]].

For Exercise 7 (nn_model()) this was the output while grading overall assignment.
Though in the individual unit test it showed all tests passed.
As a result 5 points were deducted.

This means your code does not work correctly for one of the tests the grader uses.