The new logging tests assert that when you create a Cache, there are no WARN log statements being logged.
Unfortunately, src/tests (unit tests) is in the classpath of integration tests (CacheWithCustomLogConfigIntegrationTest is an integration test). Apparently springshell gets kicked on when we create a cache, it finds org.apache.geode.management.internal.cli.CommandManagerJUnitTest$MockPluginCommand because it's annotated as a springshell Command and then Spring logs this: [Logger=org.apache.geode Level=WARN Message=(tid=25 msgId=0) Could not load plugin command: org.springframework.shell.core.CommandMarker: Provider org.apache.geode.management.internal.cli.CommandManagerJUnitTest$MockPluginCommand not found] My test is NOT logging that, Spring is. So how do we fix this? Should I try to ignore WARN log statements in my logging tests that involve Spring? org.apache.geode.internal.logging.log4j.CacheWithCustomLogConfigIntegrationTest > cacheLogWriterInfoMessageIsSuppressed FAILED java.lang.AssertionError: Expecting empty but was:<[Logger=org.apache.geode Level=WARN Message=(tid=25 msgId=0) Could not load plugin command: org.springframework.shell.core.CommandMarker: Provider org.apache.geode.management.internal.cli.CommandManagerJUnitTest$MockPluginCommand not found]> at org.apache.geode.internal.logging.log4j.CacheWithCustomLogConfigIntegrationTest.cacheLogWriterInfoMessageIsSuppressed(CacheWithCustomLogConfigIntegrationTest.java:134)