Sample.cs

[Test]
public void SomeTest()
{
    var ioc = new TestIoC();
    var orderService = ioc.Get<OrderService>();
    ...
}

TestIoC.cs

public partial class TestIoC
{
    private readonly IKernel _kernel = new StandardKernel(Root.Modules);
    private Mock<ILogger> _loggerMock;
    
    public TestIoC()
    {
        BindMock(_ => LoggerMock);
    }

    public Mock<ILogger> LoggerMock
    {
        get
        {
            return _loggerMock ?? (_loggerMock = new Mock<ILogger>());
        }
    }
    
    public T Get<T>()
    {
        _hasResolved = true;
        return _kernel.Get<T>();
    }

    public void BindMock<T>(Func<IContext, Mock<T>> mock) where T : class
    {
        EnsureSetup();
        _kernel.Rebind<T>()
               .ToMethod(c => mock(c).Object)
               .InSingletonScope();
    }

    private void EnsureSetup()
    {
        if (_hasResolved)
        {
            throw new InvalidOperationException("All setup must be done before resolving");
        }
    }
}