Testimonial “bouncing”

Not sure how to describe this, but here goes. :)

I have a testimonial inside a Testimonial Element inside a Color Section. I am using a background image in the Color Section. Some testimonials contain multiple lines of text. This causes the Color Section to expand and contract (height) every time a new testimonial appears.
Is there a way to keep this from moving? I’ve messed around with every combination of settings, but I can’t figure it out.

Thanks for any help!