MagicalRecord = swift_dynamicCastClassUnconditional only in Unit Tests

i've looked over this for hours. I am using MagicalRecord. Everything is fine in the application , but in the unit tests i get a swift_dynamicCastClassUnconditional error when i run the following

func testExampleQCPerson() {

    let person  = QCPerson.MR_createEntity() as QCPerson //error happens here
    person.displayOrder = NSNumber(integer: 0)

    let personB  = QCPerson.MR_createEntity() as QCPerson
    personB.displayOrder = NSNumber(integer: 0)
    personB.updateOrderForPrevious()

    XCTAssert(person.displayOrder.integerValue == 1, "should have incremented")
}

as the past posts suggest, i need to make my models objective C friendly with @objc(ModelName)...so i have already done that:

import Foundation
import CoreData
@objc(QCPerson)
class QCPerson: NSManagedObject {

  @NSManaged var person_id: NSNumber
  @NSManaged var displayOrder: NSNumber
  @NSManaged var contactRefrence: String
  @NSManaged var name: String
  @NSManaged var actionType: String
}

while this makes the rest of the application functional, I'd really prefer to be able to test things as well. i will add, i can do this in the unit test

let xx: AnyObject = QCPerson.MR_createEntity() as AnyObject
XCTAssertNotNil(xx, "should exists")

but that doesn't help me with my class specific needs