Try to fix AssertionError in test

1 job for develop in 1 minute and 41 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #30167
docker
test

00:01:41

 
Name Stage Failure
failed
test Test
AssertionError: code

----------------------------- Captured stderr call -----------------------------
INFO:traitlets:Executing notebook with kernel: python3
INFO:traitlets:Executing notebook with kernel: python3
=========================== short test summary info ============================
FAILED tests/test_nbcourse.py::test_nbcourse_wrong_build - Failed: DID NOT RA...
======================== 1 failed, 20 passed in 22.41s =========================
ERROR: Job failed: exit code 1