qmltest::ClickWindow::test_clickBothWindows() failed on linux and windows

~/qt/qt5-build/qtdeclarative/tests/auto/qmltest$ make check
/Users/liangqi/qt/qt5-build/qtdeclarative/tests/auto/qmltest/target_wrapper.sh  ./tst_qmltest 
********* Start testing of qmltest *********
Config: Using QtTest library 5.6.1, Qt 5.6.1 (x86_64-little_endian-lp64 shared (dynamic) debug build; by Clang 7.3.0 (clang-703.0.31) (Apple))
...
PASS   : qmltest::ClickWindow::initTestCase()
FAIL!  : qmltest::ClickWindow::test_clickBothWindows() 'verify()' returned FALSE. ()
   Loc: [/home/qt/work/qt/qtdeclarative/tests/auto/qmltest/window/tst_clickwindow.qml(81)]
PASS   : qmltest::ClickWindow::cleanupTestCase()
...
********* Finished testing of qmltest *********