Use web project config.json when doing integration testing

I am using ASP.NET 5 RC1 and I need to write a few integration tests so I have:

public class IntegrationTests {

  private readonly TestServer _server;
  private readonly HttpClient _client;

  public IntegrationTests() {

    _server = new TestServer(TestServer.CreateBuilder().UseStartup<Startup>());
    _client = _server.CreateClient();

  }

  // Test methods ...
}

When I run it I get the error:

The configuration file 'C:\Projects\ASPNET5_TEST\config.json' was not found and is not optional.

Do I need to copy config.json to the Test project and maintain the 2?

How can I use the config.json of my web project?