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 08:49:47,526 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 08:49:47,531 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 08:49:47,542 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 08:49:47,543 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 08:49:47,599 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 08:49:47,599 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 08:49:47,600 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library cleaned successfully 08:49:47,600 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer stopped 08:49:48,831 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 08:49:48,831 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 08:49:48,840 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 08:49:48,840 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 08:49:48,943 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 08:49:48,943 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 08:49:48,946 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 08:49:48,946 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 08:49:49,30 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 08:49:49,31 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 08:49:49,32 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 08:49:49,32 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled 08:49:49,111 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library writer starting update to 1 08:49:49,112 PM [main] [DEBUG] YangLibraryWriter - Allocated new transaction chain 08:49:49,113 PM [main] [DEBUG] YangLibraryWriter - ietf-yang-library updated successfully 08:49:49,113 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state enabled 08:49:49,124 PM [main] [WARN] YangLibraryWriter - ietf-yang-library not present in context, skipping update 08:49:49,124 PM [main] [INFO] YangLibraryWriter - ietf-yang-library writer started with modules-state disabled