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 02:36:41,196 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 02:36:41,201 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:41,215 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 02:36:41,215 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 02:36:41,274 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 02:36:41,275 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:41,276 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 02:36:41,276 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 02:36:42,641 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 02:36:42,641 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:42,650 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 02:36:42,650 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 02:36:42,758 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 02:36:42,758 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:42,763 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 02:36:42,763 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 02:36:42,843 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 02:36:42,844 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:42,845 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 02:36:42,845 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 02:36:42,921 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 02:36:42,922 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:42,924 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 02:36:42,924 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 02:36:42,936 AM [main] [WARN] YangLibraryWriter - ietf-yang-library not present in context, skipping update 02:36:42,937 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled