在UITesting期间导致内存警告和崩溃的背景图像

I have a simple UITest which taps an item on the tool bar 100 times, running the test with no background image consistently passes, however when I add a background image I receive memory warnings followed by the test failing. I've tried numerous solutions for displaying the image, most all of them cause the same result, memory warnings followed by a crash. I have an image set consisting of three png images sized at 3X: 2304 X 3072, 2X: 1536 X 2048, and 1X: 768 X 1024, as per apple docs. How can I add a background image so that it wont cause memory issues. I have a simple UITest which taps an item on th