Mockito is currently self-attaching to enable the inline-mock-maker. This will no longer work in future releases of the JDK. Please add Mockito as an agent to your build what is described in Mockito's documentation: https://javadoc.io/doc/org.mockito/mockito-core/latest/org/mockito/Mockito.html#0.3 WARNING: A Java agent has been loaded dynamically (/tmp/r/net/bytebuddy/byte-buddy-agent/1.15.4/byte-buddy-agent-1.15.4.jar) WARNING: If a serviceability tool is in use, please run with -XX:+EnableDynamicAgentLoading to hide this warning WARNING: If a serviceability tool is not in use, please run with -Djdk.instrument.traceUsage for more information WARNING: Dynamic loading of agents will be disallowed by default in a future release 05:37:34,11 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 05:37:34,28 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:37:34,46 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 05:37:34,47 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 05:37:34,115 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 05:37:34,115 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:37:34,116 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 05:37:34,116 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 05:37:35,481 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 05:37:35,481 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:37:35,492 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 05:37:35,492 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 05:37:35,604 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 05:37:35,605 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:37:35,608 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 05:37:35,608 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 05:37:35,698 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 05:37:35,699 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:37:35,700 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 05:37:35,700 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 05:37:35,783 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 05:37:35,783 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:37:35,785 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 05:37:35,785 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 05:37:35,798 PM [main] [WARN] YangLibraryWriter - ietf-yang-library not present in context, skipping update 05:37:35,798 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled