Subtle popping noise after changing the struts

All,

I'm pretty sure I know the answer to this, but advice from fanatics always helps,

I changed out my struts and shocks last week. I did not change springs, and the struts were made for stock replacement. I noticed that when I pull out of my driveway, I can hear a little pop, like the spring is popping back into place. I am pretty sure that this will calm down once the struts work themselves in, but if anyone knows of any other reason it would be making this noise, please advise...

Thanks