tst_QTabWidget::paintEventCount() is flaky

/Users/qt/work/qt/qtbase/tests/auto/widgets/widgets/qtabwidget/target_wrapper.sh  ./tst_qtabwidget -o /Users/qt/work/testresults/tests/auto/widgets/widgets/qtabwidget290967326,xml -o -,txt
 ********* Start testing of tst_QTabWidget *********
 Config: Using QtTest library 5.12.0, Qt 5.12.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by Clang 8.1.0 (clang-802.0.42) (Apple))
 PASS   : tst_QTabWidget::initTestCase()
 PASS   : tst_QTabWidget::getSetCheck()
 PASS   : tst_QTabWidget::testChild()
 PASS   : tst_QTabWidget::addRemoveTab()
 PASS   : tst_QTabWidget::tabPosition()
 PASS   : tst_QTabWidget::tabEnabled()
 PASS   : tst_QTabWidget::tabText()
 PASS   : tst_QTabWidget::tabShape()
 PASS   : tst_QTabWidget::tabTooltip()
 PASS   : tst_QTabWidget::tabIcon()
 PASS   : tst_QTabWidget::indexOf()
 PASS   : tst_QTabWidget::currentWidget()
 PASS   : tst_QTabWidget::currentIndex()
 PASS   : tst_QTabWidget::cornerWidget()
 PASS   : tst_QTabWidget::removeTab()
 PASS   : tst_QTabWidget::clear()
 PASS   : tst_QTabWidget::keyboardNavigation()
 FAIL!  : tst_QTabWidget::paintEventCount() Compared values are not the same
    Actual   (tab2->count): 2
    Expected (1)          : 1
    Loc: [tst_qtabwidget.cpp(573)]
 PASS   : tst_QTabWidget::minimumSizeHint()
 PASS   : tst_QTabWidget::heightForWidth(West)
 PASS   : tst_QTabWidget::heightForWidth(North)
 PASS   : tst_QTabWidget::heightForWidth(East)
 PASS   : tst_QTabWidget::heightForWidth(South)
 PASS   : tst_QTabWidget::tabBarClicked()
 PASS   : tst_QTabWidget::moveCurrentTab()
 PASS   : tst_QTabWidget::autoHide()
 PASS   : tst_QTabWidget::cleanupTestCase()
 Totals: 26 passed, 1 failed, 0 skipped, 0 blacklisted, 813ms
 ********* Finished testing of tst_QTabWidget *********
 make: *** [check] Error 1