Failures for new `pytest-fail-slow` check in Windows CI jobs

Issue to keep track of spurious failures after gh-20672 was merged yesterday. 

This one showed up on gh-17924:
```
 ______________ TestDifferentialEvolutionSolver.test_strategy_fn _______________
[gw0] win32 -- Python 3.12.3 C:\hostedtoolcache\windows\Python\3.12.3\x64\python.exe
Test passed but took too long to run: Duration 1.9977539000001343s > 1.0s
```