It in fact did not test anything about dazzle camouflage. The study [1] (linked by the linked article) did test how predators vision works and determined that Zebras camouflage doesn't serve much purpose at long ranges, but doesn't prove anything about shorter ranges where dazzle camouflage may make it easier for zebras to run away because predators aren't following them accurately.

[1]: https://journals.plos.org/plosone/article?id=10.1371/journal...