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 04:00:04,780 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 04:00:04,785 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 04:00:04,797 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 04:00:04,798 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 04:00:04,854 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 04:00:04,854 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 04:00:04,855 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 04:00:04,855 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 04:00:06,113 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 04:00:06,114 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 04:00:06,122 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 04:00:06,122 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 04:00:06,221 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 04:00:06,221 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 04:00:06,223 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 04:00:06,224 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 04:00:06,306 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 04:00:06,307 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 04:00:06,308 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 04:00:06,308 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 04:00:06,382 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 04:00:06,382 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 04:00:06,384 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 04:00:06,384 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 04:00:06,394 PM [main] [WARN] YangLibraryWriter - ietf-yang-library not present in context, skipping update 04:00:06,394 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled