Simple past tense and past participle of retest.(verb)
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Use "retested" in a sentence
"But I think back to the 'old days' when tech giants like Intel, Microsoft, or Oracle would carefully manage a product rollout with the launch being tested and retested multiple times before ever hitting the market."
"Last year, five athletes were caught when the IOC retested samples from the 2008 Beijing Olympics for CERA, an advanced version of the endurance-boosting drug EPO."
"Ten of the group were retested and seven had stayed free of diabetes."