Instructions:

Run tests:

./gradlew test

With logback 1.3.0-alpha11 output looks like:

20 ene 1970;00:29:43.126 INFO org.example.DatePatternBrokenTest - something

Switching to logback 1.3.0-alpha10, output looks like:

18 dic 2021;00:19:58.343 INFO org.example.DatePatternBrokenTest - something