tst_QListView::taskQTBUG_2233_scrollHiddenItems fails on qpa, xcb

qt@bq-ubuntu1004-x86-37:~/rmcgover/qtbase/qt/qtbase/tests/auto/qlistview$ make check
./tst_qlistview 

Information of screen 258:
  width.........: 800
  height........: 600
  depth.........: 24
  white pixel...: ffffff
  black pixel...: 0

Running window manager: KWin
********* Start testing of tst_QListView *********
Config: Using QTest library 5.0.0, Qt 5.0.0
PASS   : tst_QListView::initTestCase()
PASS   : tst_QListView::getSetCheck()
created regular window: 62914562
PASS   : tst_QListView::noDelegate()
created regular window: 62914565
PASS   : tst_QListView::noModel()
created regular window: 62914568
PASS   : tst_QListView::emptyModel()
created regular window: 62914571
PASS   : tst_QListView::removeRows()
created regular window: 62914574
PASS   : tst_QListView::cursorMove()
created regular window: 62914578
PASS   : tst_QListView::hideRows()
PASS   : tst_QListView::moveCursor()
created regular window: 62914581
PASS   : tst_QListView::moveCursor2()
PASS   : tst_QListView::moveCursor3()
created regular window: 62914585
PASS   : tst_QListView::indexAt()
created regular window: 62914589
PASS   : tst_QListView::clicked()
created regular window: 62914594
PASS   : tst_QListView::singleSelectionRemoveRow()
created regular window: 62914597
PASS   : tst_QListView::singleSelectionRemoveColumn()
created regular window: 62914600
PASS   : tst_QListView::modelColumn()
created regular window: 62914603
PASS   : tst_QListView::hideFirstRow()
created regular window: 62914607
PASS   : tst_QListView::batchedMode()
created regular window: 62914611
PASS   : tst_QListView::setCurrentIndex()
created regular window: 62914615
created regular window: 62914619
created regular window: 62914623
created regular window: 62914627
created regular window: 62914631
created regular window: 62914635
created regular window: 62914639
created regular window: 62914643
created regular window: 62914647
created regular window: 62914651
created regular window: 62914655
created regular window: 62914659
PASS   : tst_QListView::selection()
created regular window: 62914663
PASS   : tst_QListView::scrollTo()
created regular window: 62914667
PASS   : tst_QListView::scrollBarRanges()
created regular window: 62914671
created regular window: 62914675
created regular window: 62914679
created regular window: 62914683
created regular window: 62914687
created regular window: 62914691
PASS   : tst_QListView::scrollBarAsNeeded()
PASS   : tst_QListView::moveItems()
created regular window: 62914695
PASS   : tst_QListView::wordWrap()
SKIP   : tst_QListView::setCurrentIndexAfterAppendRowCrash() This test only makes sense on windows 2000 and higher.
   Loc: [tst_qlistview.cpp(1496)]
PASS   : tst_QListView::emptyItemSize()
PASS   : tst_QListView::task203585_selectAll()
created regular window: 62914699
PASS   : tst_QListView::task228566_infiniteRelayout()
created regular window: 62914703
PASS   : tst_QListView::task248430_crashWith0SizedItem()
created regular window: 62914707
PASS   : tst_QListView::task250446_scrollChanged()
PASS   : tst_QListView::task196118_visualRegionForSelection()
created regular window: 62914711
PASS   : tst_QListView::task254449_draggingItemToNegativeCoordinates()
created regular window: 62914715
PASS   : tst_QListView::keyboardSearch()
created regular window: 62914719
created regular window: 62914723
PASS   : tst_QListView::shiftSelectionWithNonUniformItemSizes()
PASS   : tst_QListView::clickOnViewportClearsSelection()
created regular window: 62914727
PASS   : tst_QListView::task262152_setModelColumnNavigate()
created regular window: 62914731
created regular window: 62914735
FAIL!  : tst_QListView::taskQTBUG_2233_scrollHiddenItems(LeftToRight) Compared values are not the same
   Actual (bar->maximum()): 48
   Expected (rowCount/4 - nbVisibleItem): 49
   Loc: [tst_qlistview.cpp(1864)]
created regular window: 62914739
PASS   : tst_QListView::taskQTBUG_633_changeModelData()
PASS   : tst_QListView::taskQTBUG_435_deselectOnViewportClick()
created regular window: 62914743
PASS   : tst_QListView::taskQTBUG_2678_spacingAndWrappedText()
created regular window: 62914747
PASS   : tst_QListView::taskQTBUG_5877_skippingItemInPageDownUp()
created regular window: 62914751
PASS   : tst_QListView::taskQTBUG_9455_wrongScrollbarRanges()
created regular window: 62914755
PASS   : tst_QListView::styleOptionViewItem()
created regular window: 62914759
PASS   : tst_QListView::taskQTBUG_12308_artihmeticException()
created regular window: 62914763
PASS   : tst_QListView::taskQTBUG_12308_wrongFlowLayout()
PASS   : tst_QListView::cleanupTestCase()
Totals: 45 passed, 1 failed, 1 skipped
********* Finished testing of tst_QListView *********
make: *** [check] Error 1