A MightyMoose reporter suitable for front loading.

AutoTestReporter.cs

using System.Linq;
using ApprovalTests.Core;

namespace ApprovalTests.Reporters
{
    public class AutoTestReporter : IEnvironmentAwareReporter
    {
        public static readonly AutoTestReporter INSTANCE = new AutoTestReporter();

        public void Report(string approved, string received)
        {
        }

        public bool IsWorkingInThisEnvironment(string forFile)
        {
            return Approvals.CurrentCaller.NonLambdaCallers
                .Any(c => c.Class.Assembly.GetName().Name.StartsWith("AutoTest.TestRunners"));
        }
    }
}