Run NUnit tests in dotnet core

I am trying to run unit tests for my c# project with dotnet core. I am using docker container for runtime.

Dockerfile

FROM microsoft/dotnet:0.0.1-alpha
RUN mkdir /src
WORKDIR /src
ADD . /src
RUN dotnet restore

"NUnit" and "NUnit.Runners" have been added into project.json

"version": "1.0.0-*",
"compilationOptions": {
    "emitEntryPoint": true
},

"dependencies": {
    "NETStandard.Library": "1.0.0-rc2-23811",
    "NUnit": "3.2.0",
    "NUnit.Runners": "3.2.0"
},
"frameworks": {
    "dnxcore50": { }
}

Run dotnet restore successfully with the following output

...
log  : Installing NUnit.ConsoleRunner 3.2.0.
log  : Installing NUnit.Extension.NUnitV2ResultWriter 3.2.0.
log  : Installing NUnit.Extension.NUnitV2Driver 3.2.0.
log  : Installing NUnit.Extension.VSProjectLoader 3.2.0.
log  : Installing NUnit.Extension.NUnitProjectLoader 3.2.0.
log  : Installing NUnit.Runners 3.2.0.
info : Committing restore...
log  : Restore completed in 4352ms.

tried to run the tests with

dotnet nunit

dotnet nunit-console

Not work.

So my questions is how am I going to call the runner? Or can someone suggest another unit testing framework that works with current version of dotnet core?

Appreciate any help that you can provide. Thank you!