test: add ctfd_challenge.attribution empty case
#592
| Job | Run time |
|---|---|
| 14s | |
| 1m 0s | |
| 1m 14s |
ctfd_challenge.attribution empty case
#592
| Job | Run time |
|---|---|
| 14s | |
| 1m 0s | |
| 1m 14s |