From Longman Dictionary of Contemporary Englishbe a testament to somethingbe a testament to something formalSHOW/BE A SIGN OFto prove or show very clearly that something exists or is true The aircraft’s safety record is a testament to its designers’ skill. → testament
Examples from the Corpus
be a testament to something• A growing pile of single bananas is testament to the fact that there is only a market for clusters.• His four-storey department-style store is testament to that.• I think the 15,000 people who recreate down here every year are a testament to that.• I was testament to that fact.• That they verge on clich without becoming mundane is testament to Romo's strength as a storyteller.• That we remain largely unaware of this when we look is testament to his skill.• This is a testament to survival and an example to us all.• Try the patience of owners as it might, such uncertainty is testament to evolution. 