Don't run the @testset if there are no tests (#319)
#666
| Job | Run time |
|---|---|
| 2m 17s | |
| 1m 54s | |
| 1m 7s | |
| 59s | |
| 1m 0s | |
| 1m 2s | |
| 1m 0s | |
| 2m 0s | |
| 1m 56s | |
| 2m 5s | |
| 1m 55s | |
| 1m 55s | |
| 2m 22s | |
| 3m 0s | |
| 3m 33s | |
| 3m 1s | |
| 1m 45s | |
| 2m 17s | |
| 2m 4s | |
| 37m 12s |