The Sky Blues took on Darren Moore's West Bromwich Albion at The Hawthorns in the inaugural Cyrille Regis Shield fixture.
It was the hosts who would go on to secure the victory thanks to a brace from Harvey Barnes and Hal Robson Kanu, as well as a fifth from Jake Livermore.
Reise Allassani and Jordon Thompson scored their first goals of pre-season for Mark Robins side, who now head into the beginning of the Sky Bet League One season against Scunthorpe United on Saturday.