Description
Cosmic voids can supply powerful insights into the nature of dark energy,
provided that we have accurate models of their statistical properties. In this talk
I will present a new method to predict void density profiles, and
show how we can reduce systematic errors when probing the growth rate around
voids. This will be crucial for testing non-standard dark energy models with
upcoming large survey campaigns. Finally, I will also present a self-consistent
measurement of the growth rate around galaxies and around voids, in the 6-
degree Field Galaxy Survey, as a test of the standard model of gravity.