trial run 
noun
A preliminary test of how a new system or product works: the police used Sunday’s US Cup game as a trial run for next year’s games...
- With the experience of the trial run, they hope to fine tune the system and make it fool proof, so that passengers using the facility will not be disappointed.
- Two members of the operational team, it went on to say, had evaded security checks during a recent trial run at an unidentified New York airport.
- I am therefore going to run an experimental trial run next week, from Monday March 24 to Sunday March 30.
- addibility
- addible
- addict
- addicted
- addictedness
- addicting
- addiction
- addiction counseling
- addiction counselling
- addiction counsellor
- addiction counselor
- addiction program
- addiction programme
- addiction treatment
- addictive
- addictively
- addictiveness
- addiment
- add-in
- adding machine
- Addington, Henry
- add insult to injury
- addio
- Addis Ababa
- Addisonian