Controls how standard output or error from a test suite will be retained in the test results after the build completes. (This refers only to additional messages printed to console, not to a failure stack trace.) Some output is always retained for tests, but by default, excessively long output is truncated to save disk space. This property can be used to control whether that truncation takes place: Beware that storing large output can cause Jenkins's memory consumption to substantially increase, even if you never look at the test results.