diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 88b9413c270e74b41f08a6317bd15b5e4872c47d..613c119390ac2eebe7231d03574ee6ab2ff2fde0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -20,9 +20,9 @@
 # along with this program. If not, see <https://www.gnu.org/licenses/>.
 
 variables:
-  TRIGGERED_BY_REPO: "${TRIGGERED_BY_REPO:-CPPINTTEST}"
-  TRIGGERED_BY_REF: "${TRIGGERED_BY_REF:-$CI_COMMIT_REF_NAME}"
-  TRIGGERED_BY_HASH: "${TRIGGERED_BY_HASH:-$CI_COMMIT_SHORT_SHA}"
+  TRIGGERED_BY_REPO: CPPINTTEST
+  TRIGGERED_BY_REF: '${TRIGGERED_BY_REF:-$CI_COMMIT_REF_NAME}'
+  TRIGGERED_BY_HASH: ${TRIGGERED_BY_HASH:-$CI_COMMIT_SHORT_SHA}
 
 stages:
   - setup