Re: How to ignore system properties?

Don't ignore them - restore them to previous values after the test is complete. This can be done with a test rule or a before/afterclass hook. See here, for example: https://github.com/apache/lucene/blob/main/lucene/test-framework/src/java/org/apache/lucene/tests/util/LuceneTestCase.java#L642-L655

How to ignore system properties?

We got system properties invariant errors from LuceneTestCase sometimes, which were brought up by our dependencies. Is there any way to ignore some system properties through annotation/settings?