Multiple frameworks doesn't work with VS test explorer

[h0useRus]

Hi, latest version working fine with one framework with Test Explorer and dotnet test, but if you select more than one framework in project.json working only dotnet test, but not in Test Explorer, all tests disappear. My project.json:

{
    "version": "1.2.3.4",
    "dependencies": {
        "MyLib": {
            "target": "project"
        },
        "NUnit": "3.2.1",
        "dotnet-test-nunit": "3.4.0-alpha-2"
    },
    "testRunner": "nunit",
    "frameworks": {
        "net451": { },       
        "netcoreapp1.0": {
            "imports": [
                "dnxcore50",
                "netcoreapp1.0",
                "portable-net45+win8"
            ],
            "dependencies": {
                "Microsoft.NETCore.App": {
                    "version": "1.0.0-*",
                    "type": "platform"
                }
            },
            "buildOptions": {
                "define": [ "NETCORE" ]
            }
        }
    }
}