diff --git a/tools/run_tests/dockerize/build_interop_image.sh b/tools/run_tests/dockerize/build_interop_image.sh
index 77c7a84828efcefbcd0cc0c2da5fcfd927bdc524..9d8ad5325c1a827f49e311aa630e3c39c38aec74 100755
--- a/tools/run_tests/dockerize/build_interop_image.sh
+++ b/tools/run_tests/dockerize/build_interop_image.sh
@@ -69,8 +69,8 @@ fi
 
 if [ "$DOCKERHUB_ORGANIZATION" != "" ]
 then
-  DOCKER_IMAGE_NAME=$DOCKERHUB_ORGANIZATION/$BASE_IMAGE
-  docker pull $DOCKER_IMAGE_NAME
+  BASE_IMAGE=$DOCKERHUB_ORGANIZATION/$BASE_IMAGE
+  docker pull $BASE_IMAGE
 else
   # Make sure docker image has been built. Should be instantaneous if so.
   docker build -t $BASE_IMAGE --force-rm=true tools/dockerfile/interoptest/$BASE_NAME || exit $?