tst_qqmldebuggingenabler fails

QtQA::App::TestRunner: begin tst_qqmldebuggingenabler: [release\tst_qqmldebuggingenabler.exe] [-silent] [-o] [C:\work\ci\qt\qt5\5.5\_artifacts\test-logs\tst_qqmldebuggingenabler.exe-testresults-00.xml,xml] [-o] [-,txt]
Testing tst_QQmlDebuggingEnabler
FAIL!  : tst_QQmlDebuggingEnabler::qmlsceneInvalidPorts() '!init(false, true, 10, 20)' returned FALSE. ()
tst_qqmldebuggingenabler.cpp(166) : failure location
FAIL!  : tst_QQmlDebuggingEnabler::qmlsceneBlockInvalidPorts() '!init(true, true, 10, 20)' returned FALSE. ()
tst_qqmldebuggingenabler.cpp(173) : failure location
FAIL!  : tst_QQmlDebuggingEnabler::custom() 'init(false, false, 5555, 5565)' returned FALSE. ()
tst_qqmldebuggingenabler.cpp(190) : failure location
FAIL!  : tst_QQmlDebuggingEnabler::customBlock() 'init(true, false, 5555, 5565)' returned FALSE. ()
tst_qqmldebuggingenabler.cpp(195) : failure location
FAIL!  : tst_QQmlDebuggingEnabler::customInvalidPorts() 'process->output().contains( QString(QLatin1String("QML Debugger: Unable to listen to port %1.")).arg(i))' returned FALSE. ()
tst_qqmldebuggingenabler.cpp(203) : failure location
FAIL!  : tst_QQmlDebuggingEnabler::customBlockInvalidPorts() 'process->output().contains( QString(QLatin1String("QML Debugger: Unable to listen to port %1.")).arg(i))' returned FALSE. ()
tst_qqmldebuggingenabler.cpp(212) : failure location
FAIL!  : tst_QQmlDebuggingEnabler::customMixedPorts() 'init(false, false, 1020, 1030)' returned FALSE. ()
tst_qqmldebuggingenabler.cpp(218) : failure location
FAIL!  : tst_QQmlDebuggingEnabler::customBlockMixedPorts() 'init(true, false, 1020, 1030)' returned FALSE. ()
tst_qqmldebuggingenabler.cpp(227) : failure location
Totals: 6 passed, 8 failed, 0 skipped, 0 blacklisted
QtQA::App::TestRunner: end tst_qqmldebuggingenabler: 30 seconds, exit code 0