That doesn't seem to work either.  The exact error I'm getting from eclipse is:

```
The method contains(capture#2-of ? extends TenacityPropertyKey...) in the type AbstractIterableAssert<IterableAssert<capture#2-of ? extends TenacityPropertyKey>,Iterable<capture#2-of ? extends TenacityPropertyKey>,capture#2-of ? extends TenacityPropertyKey> is not applicable for the arguments (TenacityPropertyKey)	TenacityPropertyKeyResourceTest.java	/tenacity-core/src/test/java/com/yammer/tenacity/tests	line 27	Java Problem
```

I converted the Iterable to a List and that worked.