RetrieveRequest doesn't throw RecordNotFoundByEntityKey error #280

[TestClass]
public class RetrieveByAlternateKeyTests
{
    [TestMethod]
    public void Retrieve_UnknownAlternateKey_ThrowsErrorCode()
    {
        // Arrange
        var context = MiddlewareBuilder
            .New()
            .AddCrud()
            .AddFakeMessageExecutors()
            .AddGenericFakeMessageExecutors()
            .AddPipelineSimulation()
            .UsePipelineSimulation()
            .UseMessages()
            .SetLicense(FakeXrmEasyLicense.Commercial)
            .Build();

        context.EnableProxyTypes(typeof(Account).Assembly);
        context.InitializeMetadata(typeof(Account).Assembly);

        void AddAlternateKey(string entityLogicalName, params string[] keyAttributes)
        {
            var metadata = context.GetEntityMetadataByName(entityLogicalName);
            metadata.SetSealedPropertyValue(nameof(metadata.Keys), new EntityKeyMetadata[]
            {
                new() { KeyAttributes = keyAttributes }
            });
            context.SetEntityMetadata(metadata);
        }

        AddAlternateKey(Account.EntityLogicalName, Account.Fields.AccountNumber);

        var service = context.GetOrganizationService();

        // Act + Assert
        var exception = Assert.Throws<FaultException<OrganizationServiceFault>>(() =>
        {
            service.Execute(new RetrieveRequest()
            {
                Target = new EntityReference(Account.EntityLogicalName, Account.Fields.AccountNumber, "something"),
                ColumnSet = new ColumnSet(false),
            });
        });
        Assert.AreEqual(ErrorCodes.RecordNotFoundByEntityKey, (ErrorCodes)exception.Detail.ErrorCode);
    }
}