Keept getting errormessages like the following
C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1819,5): warning MSB3245: Could not resolve this reference. Could not locate the assembly "Microsoft.VisualStudio.QualityTools.UnitTestFramework, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors.
Turns out there is a simpler solution than installing Visual Studio on the build-server.
there is a nuget package that resolves this error
PM> Install-Package Microsoft.VisualStudio.QualityTools.UnitTestFramework.Updated