More discounts may soon be coming to Amazon Prime members at Whole Foods Market.

At a Whole Foods in Austin, Texas, the grocer has tested marketing material that promotes 10 percent discounts for Prime members, according pictures of that signage obtained by CNBC.

The discounts are not official, and the marketing material is still in its trial stage. The banners were hung late Wednesday in the store and had been removed by Thursday morning.

A Whole Foods spokesperson told CNBC, "We're not testing this offer at any of our stores."

One of the banners tells Amazon Prime members "blue signs mean special deals just for you, yes you." Another proclaims that Prime members save an extra 10 percent off "hundreds of sale prices."

The yellow and blue banners are one more indication of how the internet giant may use Whole Foods following its $13.7 billion acquisition of the grocer. With Whole Foods' reputation for expensive, niche items, onlookers have been watching closely to determine how it might make the grocer's products more affordable.