diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 64c9c1b7abd1f92e33d685e8c497bed3884a29dd..623712d534af6b5bbfad002424c1fc9c6341208e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,7 +6,8 @@ include:
 test:
   tags: [docker]
   parallel:
-    - COMPOSER_MAJOR: "1"
-    - COMPOSER_MAJOR: "2"
+    matrix:
+      - COMPOSER_MAJOR: "1"
+      - COMPOSER_MAJOR: "2"
   image: composer:${COMPOSER_MAJOR}
   script: composer install --ignore-platform-reqs