diff --git a/tox.ini b/tox.ini
index b591549322..472ba7f09e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -109,7 +109,7 @@ commands =
 	{toxinidir}/k8s_itests/scripts/setup.sh
     # Run paasta-tools k8s_itests in docker
     docker-compose down
-    docker-compose --verbose build --build-arg DOCKER_REGISTRY={env:DOCKER_REGISTRY:docker-dev.yelpcorp.com/} --build-arg {env:INDEX_URL_BUILD_ARG:UNUSED}=https://pypi.org/simple
+    docker-compose --verbose build --parallel --build-arg DOCKER_REGISTRY={env:DOCKER_REGISTRY:docker-dev.yelpcorp.com/} --build-arg {env:INDEX_URL_BUILD_ARG:UNUSED}=https://pypi.org/simple
     docker-compose up \
         --abort-on-container-exit