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 05:34:11,646 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 05:34:11,650 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:34:11,663 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 05:34:11,664 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 05:34:11,723 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 05:34:11,723 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:34:11,724 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 05:34:11,724 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 05:34:12,997 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 05:34:12,997 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:34:13,6 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 05:34:13,7 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 05:34:13,112 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 05:34:13,113 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:34:13,115 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 05:34:13,115 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 05:34:13,195 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 05:34:13,195 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:34:13,196 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 05:34:13,196 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 05:34:13,272 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 05:34:13,272 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 05:34:13,274 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 05:34:13,274 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 05:34:13,285 PM [main] [WARN] YangLibraryWriter - ietf-yang-library not present in context, skipping update 05:34:13,285 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled