diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7ce8662..1f25514 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -65,6 +65,9 @@ ruby-2.5.3-golang-1.9-git-2.18-chrome-69.0-node-8.x-yarn-1.2-postgresql-9.6-grap
 ruby-2.5.3-golang-1.9-git-2.18-chrome-69.0-node-10.x-yarn-1.12-postgresql-9.6-graphicsmagick-1.3.29 test: *test_custom
 ruby-2.5.3-git-2.18-chrome-69.0-node-8.x-yarn-1.2-graphicsmagick-1.3.29-docker-18.06.1 test: *test_custom
 
+# Used by www-gitlab-com's rspec job: https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/.gitlab-ci.yml
+ruby-2.4.5-git-2.18-chrome-69.0-docker-18.06.1 test: *test_custom
+
 # Not used anymore (?)
 golang-1.9-git-2.9.0 test: *test_custom
 golang-1.9-git-2.14 test: *test_custom
@@ -116,6 +119,9 @@ ruby-2.5.3-golang-1.9-git-2.18-chrome-69.0-node-8.x-yarn-1.2-postgresql-9.6-grap
 ruby-2.5.3-golang-1.9-git-2.18-chrome-69.0-node-10.x-yarn-1.12-postgresql-9.6-graphicsmagick-1.3.29: *build_and_deploy_custom
 ruby-2.5.3-git-2.18-chrome-69.0-node-8.x-yarn-1.2-graphicsmagick-1.3.29-docker-18.06.1: *build_and_deploy_custom
 
+# Used by www-gitlab-com's rspec job: https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/.gitlab-ci.yml
+ruby-2.4.5-git-2.18-chrome-69.0-docker-18.06.1: *build_and_deploy_custom
+
 # Used by https://gitlab.com/gitlab-org/trello-power-up/blob/master/.gitlab-ci.yml (?)
 node-8.9-chrome-63.0-yarn-1.2: *build_and_deploy_custom
 
diff --git a/scripts/install-docker b/scripts/install-docker
index ba83305..b2cade4 100755
--- a/scripts/install-docker
+++ b/scripts/install-docker
@@ -6,6 +6,7 @@ export DEBIAN_FRONTEND=noninteractive
 
 DOCKER_VERSION=${1}
 
+apt-get update
 apt-get -y install \
     apt-transport-https \
     ca-certificates \