Maybe this will work better?

.gitlab-ci.yml

@@ -8,36 +8,36 @@ services:
 stages:
     - test
 
-test:
-    test:7:
-        stage: test
-        before_script:
-          - sh build/docker_install.sh > /dev/null
-          - curl -sS https://getcomposer.org/installer | php
-          - php composer.phar install --no-dev
-        image: php:7-alpine
-        script:
-          - phpunit -c build --coverage-text --colors=never
 
-    test:7.1:
+test:7:
-        stage: test
+    stage: test
-        before_script:
+    before_script:
-          - sh build/docker_install.sh > /dev/null
+      - sh build/docker_install.sh > /dev/null
-          - curl -sS https://getcomposer.org/installer | php
+      - curl -sS https://getcomposer.org/installer | php
-          - php composer.phar install --no-dev
+      - php composer.phar install --no-dev
-        image: php:7.1-alpine
+    image: php:7-alpine
-        script:
+    script:
-          - phpunit -c build --coverage-text --colors=never
+      - phpunit -c build --coverage-text --colors=never
 
-    test:hhvm:
+test:7.1:
-        stage: test
+    stage: test
-        allow_failure: true
+    before_script:
-        before_script:
+      - sh build/docker_install.sh > /dev/null
-          - /usr/local/bin/composer self-update
+      - curl -sS https://getcomposer.org/installer | php
-          - curl -Lo /usr/local/bin/phpunit https://phar.phpunit.de/phpunit.phar
+      - php composer.phar install --no-dev
-          - chmod +x /usr/local/bin/phpunit
+    image: php:7.1-alpine
-          - composer install --no-dev --ignore-platform-reqs
+    script:
-        #image: 51systems/docker-gitlab-ci-runner-hhvm
+      - phpunit -c build --coverage-text --colors=never
-        image: 2ndkauboy/gitlab-ci-runner-hhvm
+
-        script:
+test:hhvm:
-          - hhvm -d hhvm.php7.all=true /usr/local/bin/phpunit -c build --coverage-text --colors=never
+    stage: test
+    allow_failure: true
+    before_script:
+      - /usr/local/bin/composer self-update
+      - curl -Lo /usr/local/bin/phpunit https://phar.phpunit.de/phpunit.phar
+      - chmod +x /usr/local/bin/phpunit
+      - composer install --no-dev --ignore-platform-reqs
+    #image: 51systems/docker-gitlab-ci-runner-hhvm
+    image: 2ndkauboy/gitlab-ci-runner-hhvm
+    script:
+      - hhvm -d hhvm.php7.all=true /usr/local/bin/phpunit -c build --coverage-text --colors=never