Most teams find that the current CI reports are more interesting than the historic results. If the CI build goes Red for any reason, Agile teams stop and fix it. Thus Agile teams don’t have the same kind of progression of pass/fail ratios that traditional teams see during a synch and stabilize phase. And that means historic trends usually are not all that interesting.
However, if the team really wants to keep historic test execution results (or are compelled to do so as a matter of regulatory compliance), the test results can be stored in the source control system with the code.
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