diff --git a/test/images/network-tester/Dockerfile b/test/images/network-tester/Dockerfile
index da21fd32..149b92c3 100644
--- a/test/images/network-tester/Dockerfile
+++ b/test/images/network-tester/Dockerfile
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 FROM bash
+RUN apk add --no-cache curl
 ADD webserver webserver
 EXPOSE 8080
 ENTRYPOINT ["/webserver"]