Where is MSTest V2

I can't seem to find this. Specifically, what I'm looking for is the ability to use [DataTestMethod] and [DataRow] attributes in my unit tests. I have Visual Studio Professional 2015 installed and I cannot seem to find these attributes in my installation. I've run the setup to see if there's something I'm missing and I can't see anything missing that might contain it.

According to this Microsoft page: http://ift.tt/1WQE4Xs

"...you can start using it right away (with Visual Studio 2015 itself) with these steps:"

"Install the “MSTest V2” TestFramework as before i.e. look for, and install the framework package as shown below:"

It's unclear what "as before" refers to. I can't find MSTest V2 for installation anywhere.

Right above the quote above, is this 5th step:

(5) Delivered as a NuGet package.

Yet I can find no NuGet package for MS Test V2.

What's the deal? Seems this ought to be ridiculously simple to do and yet I'm totally stumped.