Web API 2: Added a new controller, it won't register?

Question

Having a heck of a time here... (Web API 2.1, .NET 4.5.1)

I had one controller that worked perfectly:

[RoutePrefix("v1/members")]
public class MembersController : ApiController
{
    [Route("{id}")]
    public Member Get(string id)
    {
        DataGateway g = new DataGateway();

        return g.GetMember(id);
    }
}

Works as intended and desired like:

/v1/members/12345

But I added a new controller today and it doesn't seem to be registered or recognized at all. It doesn't get added to the Help pages and it returns a 404 Not Found when trying to access it:

[RoutePrefix("v1/test")]
public class Test : ApiController
{
    [Route("{id}")]
    public string Get(int id)
    {
        return "value";
    }
}

Like I stated, the new controller doesn't show up in the Help pages and returns a 404:

/v1/test/12345

What am I doing wrong?

EDITED TO ADD:

I installed tracing and it doesn't even seem to be hitting that. The first controller works fine and shows a trace, the new Test controller doesn't show any trace info.

EDIT 2:

Updated example code to better match my actual code, which was the problem all along.

Answer 1

The problem was here:

[RoutePrefix("v1/test")]
public class Test : ApiController

Changed to:

[RoutePrefix("v1/test")]
public class TestController : ApiController

Seems the almighty important word "Controller" needs to be in the class name for the magic to happen.