diff --git a/test/k8s/nt.Dockerfile b/test/k8s/nt.Dockerfile
index f90581a5..f76b99a4 100644
--- a/test/k8s/nt.Dockerfile
+++ b/test/k8s/nt.Dockerfile
@@ -12,6 +12,9 @@ WORKDIR /nt
 COPY --from=builder /nt/nanotube /nt
 COPY ./k8s/config /nt/config
 
+RUN     adduser graphite --disabled-password
+USER    graphite
+
 # main listening port
 EXPOSE 2003
 # Prometheus port
diff --git a/test/k8s/sender.Dockerfile b/test/k8s/sender.Dockerfile
index 51e25b02..9b5aff78 100644
--- a/test/k8s/sender.Dockerfile
+++ b/test/k8s/sender.Dockerfile
@@ -11,4 +11,7 @@ WORKDIR /nt
 COPY --from=builder /nt/sender /nt
 COPY --from=builder /nt/k8s/in /nt/in
 
+RUN     adduser graphite --disabled-password
+USER    graphite
+
 ENTRYPOINT ["./sender", "-data", "in", "-host", "localhost", "-port", "2003", "-rate", "100", "-cycle", "-retryTCP", "-promPort", "9090"]