UITest method always return UICollectionView Cell empty

Question

I have a collectionView with static data, with is loaded in viewDidLoad method. But the UITest gives me error because there is no cells. Here is my UITest method:

func testSelectCardAndValue(){

    app.buttons["btnPay"].tap()

    let collectionView = app.collectionViews
    let exists = NSPredicate(format: "exists == true")
    print("Qtde : \(collectionView.cells.count)") //ALWAYS SHOWING 0
    expectation(for: exists, evaluatedWith: collectionView.cells.firstMatch, handler: nil)

    waitForExpectations(timeout: 20, handler: nil)
    if(app.collectionViews.cells.count > 0) {
        app.collectionViews.cells.firstMatch.tap()
    }
}

Here is my screenshot of the view at the exact moment that the test failed. There is data in there. What is wrong?