QtQuickControls\tests\auto\extras\Slider menu tests fail on Windows 10

297-PASS   : qtquickcontrols::Tests_Slider::test_activeFocusOnPress()
298-PASS   : qtquickcontrols::Tests_Slider::test_activeFocusOnTab()
299-PASS   : qtquickcontrols::Tests_Slider::test_dragRounding()
300:FAIL!  : qtquickcontrols::Tests_Slider::test_dragThreshold() Compared values are not the same
301-   Actual   (): 0
302-   Expected (): 0.5
303-D:\dev\5-vs15-56\qt-56\qtquickcontrols\tests\auto\controls\data\tst_slider.qml(317) : failure location
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305-PASS   : qtquickcontrols::Tests_Slider::test_minimumvalue()
306-PASS   : qtquickcontrols::Tests_Slider::test_mouseWheel()
307-PASS   : qtquickcontrols::Tests_Slider::test_rightLeftKeyPressed()
308:FAIL!  : qtquickcontrols::Tests_Slider::test_sliderOffset() Compared values are not the same
309-   Actual   (): 0
310-   Expected (): 0.5
311-D:\dev\5-vs15-56\qt-56\qtquickcontrols\tests\auto\controls\data\tst_slider.qml(287) : failure location