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 02:36:10,654 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 02:36:10,659 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:10,671 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 02:36:10,672 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 02:36:10,732 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 02:36:10,732 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:10,733 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 02:36:10,733 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 02:36:12,26 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 02:36:12,26 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:12,35 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 02:36:12,35 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 02:36:12,140 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 02:36:12,140 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:12,142 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 02:36:12,143 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 02:36:12,221 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 02:36:12,221 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:12,222 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 02:36:12,223 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 02:36:12,296 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 02:36:12,297 AM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 02:36:12,298 AM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 02:36:12,298 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 02:36:12,309 AM [main] [WARN] YangLibraryWriter - ietf-yang-library not present in context, skipping update 02:36:12,309 AM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled