Test Failures tab reports '0 failures' but container reports Failed

I have a single container, and after running my tests, the overall (container?) status is reported as ‘Failed’. When I click on the Failed message, and am viewing the Test Summary, I’m presented with this:

Your build ran 365 tests in phpunit with 0 failures

My Show Containers widget shows: All(1) Successful (0) Failed (1)

I’m not understanding why the container is failing even though it is reporting 0 failures.

I found another report that is similar, but it had no solution.

Any insight or guidance would be appreciated. I’m out of my depth here.