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 06:09:30,966 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 06:09:30,971 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 06:09:30,984 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 06:09:30,985 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 06:09:31,44 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 06:09:31,44 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 06:09:31,45 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 06:09:31,45 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 06:09:32,277 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 06:09:32,277 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 06:09:32,286 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 06:09:32,286 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 06:09:32,389 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 06:09:32,389 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 06:09:32,391 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 06:09:32,391 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 06:09:32,482 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 06:09:32,482 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 06:09:32,484 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 06:09:32,484 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 06:09:32,561 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 06:09:32,561 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 06:09:32,563 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 06:09:32,563 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 06:09:32,575 PM [main] [WARN] YangLibraryWriter - ietf-yang-library not present in context, skipping update 06:09:32,576 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled