QuickTest cannot double-click TapHandler

When using mouseDoubleClickSequence(), or simulating a double click via press-release-press-release, in a QuickTest the TapHandler does not register the double click. It emits two tapped() signals, and doubleTapped is not emitted.

I did some digging of the code to see if I could understand what was happening, and work around it.
The issue stems from the two press events being too far apart. TapHandler wants the presses to be < 0.4 seconds apart. However, the helper in QuickTest for sending mouse events explicitly stops this from happening:

case MouseRelease:
                me = QMouseEvent(QEvent::MouseButtonRelease, pos, window->mapToGlobal(pos), button, {}, stateKey);
                me.setTimestamp(++lastMouseTimestamp);
                lastMouseTimestamp += 500; // avoid double clicks being generated
                break;

qtdeclarative/src/imports/testlib/quicktestevent.cpp:199

Thus making it impossible to perform a double click action with a TapHandler.

mouseDoubleClickSequence() is a shortcut for press-release-press-doubleclick-release. Thus the timestamps would be 1; 2; 503; 504; 505.