diff --git a/test/test_images/helloworld/Dockerfile b/test/test_images/helloworld/Dockerfile
index 5aa9bd403..76bbfdb62 100644
--- a/test/test_images/helloworld/Dockerfile
+++ b/test/test_images/helloworld/Dockerfile
@@ -10,8 +10,7 @@ WORKDIR /app
 COPY ./test/test_images/helloworld/ .
 
 # Build the binary.
-# -mod=readonly ensures immutable go.mod and go.sum in container builds.
-RUN CGO_ENABLED=0 GOOS=linux go build -mod=readonly -v -o server
+RUN CGO_ENABLED=0 GOOS=linux go build -v -o server
 
 # Use the official Alpine image for a lean production container.
 # https://hub.docker.com/_/alpine