aspnetcore/test/Microsoft.AspNet.TestHost.Tests/project.json

{
  "dependencies": {
    "Microsoft.AspNet.Hosting": "",
    "Microsoft.AspNet.TestHost": "",
    "Xunit.KRunner": "1.0.0-*"
  },
  "commands": {
    "test": "Xunit.KRunner"
  },
  "configurations": {
    "net45": { 
        "dependencies": {
            "System.Runtime": ""
        }
    }
  }
}