Add code comment for documenting the tests.

[endalk200]

Add code comment for documenting the tests.

I think adding a code comment to the test suite is a good idea for code readability and I think this will benefit a lot more people in this regard. If this is something that is acceptable to the project I can contribute this to the existing tests.

[jmcdo29]

Go for it. I'll be happy to make adjustments where necessary