Sure thing. I've had some experience with the blacklist detection due to a JS file hosted on a trusted 3rd party site that had another section of their site hacked (meaning their site was blacklisted and anything pulling resources from their site was similarly blacklisted). I researched more about how things worked then and have been sharing when I can since then. I hadn't seen your specific situation before but it is my guess based on an understanding of how similar scanning setups work.

For future reference, another useful tool is Sucuri SiteCheck, which will show you the results of multiple website malware blacklists on one page: http://sitecheck.sucuri.net/scanner/

(I checked and http://wp-abtesting.com/ is clean)