I googled a bit in French, and I can't find the specifics of the test in this story, but the separation of the couple could be a legal event that would justify

I googled a bit in French, and I can't find the specifics of the test in this story, but the separation of the couple could be a legal event that would justify the judge allowing the test (because of the skin color difference, and child support payment). Moreover, after the test, the father was allowed to be removed from the birth certificate by a judge, so I don't think it was a quick trip to Spain.