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 07:11:56,769 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 07:11:56,774 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 07:11:56,786 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 07:11:56,787 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 07:11:56,849 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 07:11:56,849 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 07:11:56,850 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 07:11:56,850 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 07:11:58,126 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 07:11:58,127 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 07:11:58,136 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 07:11:58,136 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 07:11:58,260 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 07:11:58,261 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 07:11:58,263 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 07:11:58,263 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 07:11:58,347 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 07:11:58,347 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 07:11:58,348 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 07:11:58,349 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 07:11:58,430 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 07:11:58,430 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 07:11:58,432 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 07:11:58,432 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 07:11:58,450 PM [main] [WARN] YangLibraryWriter - ietf-yang-library not present in context, skipping update 07:11:58,451 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled