I can't reproduce the test failing after hundreds of iterations on
OpenSUSE, and the test hasn't flaked at all in our CI in the last 6
months according to our dashboards.
Fixes: QTBUG-70612
Change-Id: I2397f3db5caf97f674de7d75fd99bd14c14166a4
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>