Blue Ocean is missing per-test history in the Test tab. With regular Jenkins UI, you can click a test and see how long it's been failing (Age) and when clicking the test, see the previous run times and if it's failed or not.

This is helpful to understand:

1) What caused a test to fail, based on the commit that introduced a failure.

2) Understand if a test is unreliable by seeing if it has a history of failing "randomly".

The Test summary at the top could also explicitly mention how many new failing tests this run has, if any.