Update explanatory comment in tests.
Update explanatory comment in tests.

TouK/vumi,vishwaprakashmishra/xmatrix,vishwaprakashmishra/xmatrix,harrissoerja/vumi,harrissoerja/vumi,harrissoerja/vumi,TouK/vumi,TouK/vumi,vishwaprakashmishra/xmatrix