she's settled in, but now shes developing confidence, starting to test how far she can push, and shes occasionally starting to ignore calls of her name, any advice?
What I would do is reteach recall.
Forget notions of testing, etc, even if they are true because they don't really add much information.
The net result is that the behavior needs to be made stronger to where "disobeying" won't even be a thought.
Go back to basics, use a long leash, etc, and build up the desired behavior again. Being a puppy, she's probably distracted (like a little kid), might have forgotten (again like little kids), or just doesn't have it totally cemented yet (little kids again).
If she's sniffing, it's said dogs tend to ignore sounds when they are deep in sniffing. I know Wally, even now, sometimes doesn't hear me or will ignore sounds around if he's deep in a scent. Add to that our voices tend to be on the lower/harder to hear end of their hearing - and it's another possibility. I like to clap my hands, especially at distance as another cue and the sound tends to be more "catching"/"unique", making it easier for him to pick up.
Also consider using Premacking once the behavior is re-established. This is the principle of giving the dog what they want when they do as you like. So something like, call her, praise/mark her for the recall, then send her back out to do what she was doing before.