diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c869ffbc9ff9c4a1247144ce4fe93bfe721fe8cc..029959874e85ea9bfa2c2be36a7e581fdf3e2616 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -89,7 +89,7 @@ install_and_test_311:
       - build
     expire_in: 8d
   only:
-    ci39
+    - ci39
 
 # Tests on X86_64 ubuntu
 ubuntu:X86_64: