MSTest.TestAdapter.props missing in Samples/C#/WordTest

When i try building the solution for WordTest i get the following error:
this project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them. For more information, see The missing file is packages\MSTest.TestAdapter.1.1.4-preview\build\net45\MSTest.TestAdapter.props.

I’ve tried reinstalling the package and would get the same error