Run the right image

.gitlab-ci.yml

@@ -1,7 +1,3 @@
-image: docker:19.03.8
-services:
-  - docker:19.03.8-dind
-
 stages:
   - build
   - test
@@ -15,6 +11,9 @@ before_script:
   - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
 
 build:
+  image: docker:19.03.8
+  services:
+  - docker:19.03.8-dind
   stage: build
   script:
     - docker build --pull -t $CONTAINER_TEST_IMAGE .
@@ -22,11 +21,14 @@ build:
 
 test-gcc-version:
   stage: test
+  image: $CI_TEST_IMAGE
   script:
-    - docker pull $CONTAINER_TEST_IMAGE
-    - docker run $CONTAINER_TEST_IMAGE bash tests/smoke.sh
+    - tests/smoke.sh
 
 release:
+  image: docker:19.03.8
+  services:
+  - docker:19.03.8-dind
   stage: release
   script:
     - docker pull $CONTAINER_TEST_IMAGE