English version

dummy run

From Longman Dictionary of Contemporary Englishdummy runˌdummy ˈrun noun [countable]  PRACTISE/PRACTICEan occasion when you practise doing something in complete detail to see if it works syn dry run Do a dummy run to see how long it will take.
Examples from the Corpus
dummy runMaybe everyone was out in force as a dummy run for the Countryside march on 18 March.In a recent dummy run, the 4th Marine Brigade stormed a beach on Catalina Island.
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