diff --git a/docker/Dockerfile.nakaolab.test b/docker/Dockerfile.nakaolab.test
index 8c728b36c7..da4a7d6822 100644
--- a/docker/Dockerfile.nakaolab.test
+++ b/docker/Dockerfile.nakaolab.test
@@ -16,7 +16,7 @@ RUN /bin/sh oaienv && \
       --build-e2 --cmake-opt -DKPM_VERSION=KPM_V3_00 --cmake-opt -DE2AP_VERSION=E2AP_V3 \
       --noavx512 \
       --build-tool-opt -k10 \
-      $BUILD_OPTION && \
+      --cmake-opt -DCMAKE_C_FLAGS="-Werror" --cmake-opt -DCMAKE_CXX_FLAGS="-Werror" $BUILD_OPTION && \
     echo "---- ldd on executables ----" && \
     ldd ran_build/build/*softmodem* ran_build/build/nr-cuup ran_build/build/oairu && \
     echo "---- ldd on shared libraries ----" && \