upgrade argument reflects default value stated in docs
#593
| Job | Run time |
|---|---|
| 3m 25s | |
| 9m 45s | |
| 8m 34s | |
| 15m 0s | |
| 7m 17s | |
| 3m 56s | |
| 4m 9s | |
| 4m 26s | |
| 4m 10s | |
| 3m 54s | |
| 1h 4m 36s |