diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 99373c2218e1540fb0aa88a5e79424e237b530c1..7be8847e2586aea2b144d7ef5624bbb0a82a2f62 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -99,6 +99,7 @@ build_infra:
     - export SSH_CA=`cat tmp_key.pub`
     - cd infra
     - python3 ./template.py
+    - ansible-playbook os_delete.yml
     - ansible-playbook os_create.yml
     - python3 ./make_inventory.py $CI_PROJECT_NAME-ci-$CI_COMMIT_REF_NAME > ../inventory.yml
     - cd ..