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 03:50:48,686 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 03:50:48,691 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 03:50:48,703 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 03:50:48,703 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 03:50:48,759 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 03:50:48,760 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 03:50:48,760 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 03:50:48,761 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 03:50:50,141 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 03:50:50,142 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 03:50:50,154 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 03:50:50,154 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 03:50:50,266 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 03:50:50,267 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 03:50:50,271 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 03:50:50,271 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 03:50:50,368 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 03:50:50,368 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 03:50:50,370 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 03:50:50,370 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 03:50:50,449 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 03:50:50,449 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 03:50:50,451 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 03:50:50,451 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 03:50:50,465 PM [main] [WARN] YangLibraryWriter - ietf-yang-library not present in context, skipping update 03:50:50,465 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled