this is working as intended. 100% retry passing rate means the test is "very flaky" -- you can always retry it to make it pass. 

ah, that's true, should the status be red then when clicking on the test link?

like https://wmatrix.googleplex.com/testrun/?test_ids=275435922

or should status say flaky instead of good?  

the link shows you the result of the "retry" which passed. If you click "Retry of	275431038" at the bottom, it will direct to the one that failed. Maybe the "Retry of 275431038" should be highlighted. 

ahhh.... ok, now I get it.  Sorry for the pestering, chalk this up to user error.

How about this one? https://wmatrix.googleplex.com/retry_teststats/?days_back=30&tests=platform_Perf

veyron_minnie-cheets has green background (so... good?), but if you click on it, it turns out that is has never passed (so... bad!).

If a test never passes, it means it is stable (not flaky) and reflects real problems, it is actually a good thing from the test flakiness' perspective. 

Test flakiness and test failures are two different concepts. We do have another test health dashboard
  https://wmatrix.googleplex.com/testhealth/unfiltered/?days_back=7
which indicates which tests fail more often. But keep in mind, "fail more often" != "flaky".

Awesome, I was looking for something like that :)