Using 'racism' to explain poor performance by Black people on all tests of any kind has been going on since the 70s. I heard this decades ago when I was still in school. The example given at that time was, believe it or not, saucers are racist. One of the questions on a placement test said something to the effect:
Tom has 200 saucers.
If Tom breaks 75 saucers,
how many unbroken saucers are left?
The argument made to excuse so many Black people missing this question is that Black people do not use saucers, don't even know what a saucer is, and therefore cannot answer the question. Not to mention the overtly racist nature of the excuse, what will happen when they have to calculate the ubiquitous 'widgets'?