Artifact tests

Any ideas why some of your tests are failing?

When I just check out master and run the tests I get failures, but when I re-triggered a build of master on travis everything is green.  

```
$ java -version                                                                                                                          (1)
java version "1.7.0_65"
OpenJDK Runtime Environment (IcedTea 2.5.2) (Arch Linux build 7.u65_2.5.2-2-x86_64)
OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)
```