Do Junipers Acidify the Soil?

I wonder if juniper trees provide acid to the soil underneath them. I want to plant 2 blueberry bushes and have no pines in my garden. The junipers are about 25 feet tall and there is scattered sunlight under them. I understand blueberries need sun, but it can be quite hot here all summer.

Hardiness Zone: 9b

By Donni from El Sobrante, CA