diff --git a/defaults/main.yml b/defaults/main.yml
index 08f52dbd74456a32ff47a25449942bea72cde7c9..fcbbd797e3066ecc39c7e215d256b19458b64aa5 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -2,4 +2,4 @@
 # defaults file for paas-ci
 paas_ci_orchestrator_url: https://paas.cloud.infn.it/orchestrator
 paas_ci_workdir: "{{ lookup('env','WORKSPACE') }}"        
-python3_script_path: "python3 /home/gmp/.ansible/roles/paas-ci/utils/script.py"
+python3_script_path: 'python3 /home/gmp/.ansible/roles/paas-ci/utils/script.py'