CVALv3 and Apache License 2

Can I freely use Vaadin TestBench for my addon which would licensed under Apache License 2? I mean without purchasing any license key.

https://vaadin.com/forum/#!/thread/232869
> We planning to release our application source code, do we need to purchase CVAL licenses? No, as long as you release your source code under a license that's compatible with the AGPL.
 

I don't know. Probably not. But what I can tell you is that Apache 2.0 is not compatible with AGPL.