tst_QQuickTextInput::setInputMask() is flaky on macOS 10.14

agent:2020/02/12 10:47:30 build.go:220: QDEBUG : tst_qquicktextinput::setInputMask(keys any_req) [     5.256 D] qt.qpa.window unknown - Done re-parenting <QNSView_TestNamespace: 0x7fcd4b504500; QCocoaWindow(0x7fcd4b504380, window=QWindow(0x7ffeec34f500))> into NSObject(0x0)
 agent:2020/02/12 10:47:30 build.go:220: QDEBUG : tst_qquicktextinput::setInputMask(keys any_req) [     5.256 D] qt.qpa.window unknown - Moving <QNSView_TestNamespace: 0x7fcd4b504500; QCocoaWindow(0x7fcd4b504380, window=QWindow(0x7ffeec34f500))> from <QNSWindow_TestNamespace: 0x7fcd4b513e10; contentView=<QNSView_TestNamespace: 0x7fcd4b504500; QCocoaWindow(0x7fcd4b504380, window=QWindow(0x7ffeec34f500))>> to NSObject(0x0)
 agent:2020/02/12 10:47:30 build.go:220: QDEBUG : tst_qquicktextinput::setInputMask(keys any_req) [     5.258 D] qt.qpa.window unknown - Done moving <QNSView_TestNamespace: 0x7fcd4b504500; QCocoaWindow(0x7fcd4b504380, window=QWindow(0x7ffeec34f500))> to NSObject(0x0)
 agent:2020/02/12 10:47:30 build.go:220: QDEBUG : tst_qquicktextinput::setInputMask(keys any_req) [     5.258 D] qt.qpa.cocoa.notifications unknown - Forwarding NSViewGlobalFrameDidChangeNotification to QVector(QCocoaWindow(0x7fcd4b504380, window=QWindow(0x7ffeec34f500)))
 agent:2020/02/12 10:47:30 build.go:220: QDEBUG : tst_qquicktextinput::setInputMask(keys any_req) [     5.258 D] qt.qpa.window unknown - Deallocating <QNSWindow_TestNamespace: 0x7fcd4b513e10; contentView=NSObject(0x0)>
 agent:2020/02/12 10:47:30 build.go:220: QDEBUG : tst_qquicktextinput::setInputMask(keys any_req) [     5.262 D] qt.accessibility.cache unknown - delete - id: 2147483648  iface: QAccessibleInterface(0x7fcd48dfaed0 invalid)
 agent:2020/02/12 10:47:30 build.go:220: FAIL!  : tst_qquicktextinput::setInputMask(keys any_req) Compared values are not the same
 agent:2020/02/12 10:47:30 build.go:220:    Actual   (textInput->text()): "@@AC@"
 agent:2020/02/12 10:47:30 build.go:220:    Expected (expectedText)     : "@AC@@"
 agent:2020/02/12 10:47:30 build.go:220:    Loc: [tst_qquicktextinput.cpp(6471)]