The Windows colors refactor regressed Windows 10(?) test suite

I find that when running the test suite on my Windows 10 PC, that the refactor to logging colors caused a regression to the test harness:

The tests are interpreting the ANSI colors as part of the text characters, and all tests that have ANSI colors mixed in them fail.

Interestingly this failure does not occur on my Windows 11 x64 and ARM64 CIs, so not sure if the issue is Windows 10 vs Windows 11, or something else that this particular Windows 10 system is configured to.