With some Java impl, the JSF47Logger_implTest fails if a high-level logger is set with "INFO" level, and a lower level logger (which inherits from the higher one) is created without setting the level. The javadocs say that in this case the lower level setting is set according to a global LogManager configuration setting. In many cases, it's null, which causes the level to be inherited from the parent. But it might not be. On some Jenkins test platforms, it appears that it is not null, and not INFO, thus making the test fail. (This is a conjecture - This Jira will "fix" that, and we'll see if the intermittent Jenkins failures in this test go away).