diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9f2233cb5..50a37acc8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,6 +3,7 @@ services:
  
 before_script:
    - composer config github-oauth.github.com $GITHUB_TOKEN
+   - if [ $CI_BUILD_REF_NAME = "1.0" ] ; then export COMPOSER_ROOT_VERSION="1.0-dev"; else export COMPOSER_ROOT_VERSION="dev-master"; fi
    - composer install --no-interaction
    - cp Tests/Fixtures/App/app/config/parameters.gitlab-ci.yml Tests/Fixtures/App/app/config/parameters.yml
    - ./console.sh --env=test cache:warmup
@@ -14,4 +15,5 @@ test:php-5.6:
    script: phpunit --testdox
 test:php-7:
    stage: test
+   image: chill/ci-image:php-7
    script: phpunit --testdox