diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 211bf84..97ea418 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -71,20 +71,17 @@ ruby-2.7-golang-1.15-git-2.29 test: *test_custom
 ruby-2.7-golang-1.15-git-2.29-pgbouncer-1.14 test: *test_custom
 
 # Used by GitLab: https://gitlab.com/gitlab-org/gitlab/blob/master/.gitlab-ci.yml
-ruby-2.6.6-golang-1.14-git-2.28-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-11-graphicsmagick-1.3.34 test: *test_custom
-ruby-2.6.6-golang-1.14-git-2.28-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-12-graphicsmagick-1.3.34 test: *test_custom
 ruby-2.7.2-golang-1.14-git-2.28-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-11-graphicsmagick-1.3.34 test: *test_custom
 ruby-2.7.2-golang-1.14-git-2.28-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-12-graphicsmagick-1.3.34 test: *test_custom
-ruby-2.6.6-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-11-graphicsmagick-1.3.34 test: *test_custom
-ruby-2.6.6-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-12-graphicsmagick-1.3.34 test: *test_custom
 ruby-2.7.2-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-11-graphicsmagick-1.3.34 test: *test_custom
 ruby-2.7.2-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-12-graphicsmagick-1.3.34 test: *test_custom
+ruby-3.0.0-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-11-graphicsmagick-1.3.34 test: *test_custom
+ruby-3.0.0-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-12-graphicsmagick-1.3.34 test: *test_custom
 
 # Used by GitLab's compile-production-assets and compile-test-assets jobs
-ruby-2.6.6-git-2.28-lfs-2.9-node-12.18-yarn-1.22-graphicsmagick-1.3.34 test: *test_custom
 ruby-2.7.2-git-2.28-lfs-2.9-node-12.18-yarn-1.22-graphicsmagick-1.3.34 test: *test_custom
-ruby-2.6.6-git-2.29-lfs-2.9-node-12.18-yarn-1.22-graphicsmagick-1.3.34 test: *test_custom
 ruby-2.7.2-git-2.29-lfs-2.9-node-12.18-yarn-1.22-graphicsmagick-1.3.34 test: *test_custom
+ruby-3.0.0-git-2.29-lfs-2.9-node-12.18-yarn-1.22-graphicsmagick-1.3.34 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-2.6.5-git-2.28-chrome-74.0-node-12.18-yarn-1.22-docker-19.03.1 test: *test_custom
@@ -152,19 +149,15 @@ ruby-2.7-golang-1.15-git-2.29: *build_and_deploy_custom
 ruby-2.7-golang-1.15-git-2.29-pgbouncer-1.14: *build_and_deploy_custom
 
 # Used by GitLab CE/EE: https://gitlab.com/gitlab-org/gitlab-ee/blob/master/.gitlab-ci.yml
-ruby-2.6.6-golang-1.14-git-2.28-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-11-graphicsmagick-1.3.34: *build_and_deploy_custom
-ruby-2.6.6-golang-1.14-git-2.28-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-12-graphicsmagick-1.3.34: *build_and_deploy_custom
 ruby-2.7.2-golang-1.14-git-2.28-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-11-graphicsmagick-1.3.34: *build_and_deploy_custom
 ruby-2.7.2-golang-1.14-git-2.28-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-12-graphicsmagick-1.3.34: *build_and_deploy_custom
-ruby-2.6.6-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-11-graphicsmagick-1.3.34: *build_and_deploy_custom
-ruby-2.6.6-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-12-graphicsmagick-1.3.34: *build_and_deploy_custom
 ruby-2.7.2-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-11-graphicsmagick-1.3.34: *build_and_deploy_custom
 ruby-2.7.2-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-12-graphicsmagick-1.3.34: *build_and_deploy_custom
+ruby-3.0.0-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-11-graphicsmagick-1.3.34: *build_and_deploy_custom
+ruby-3.0.0-golang-1.14-git-2.29-lfs-2.9-chrome-85-node-12.18-yarn-1.22-postgresql-12-graphicsmagick-1.3.34: *build_and_deploy_custom
 
 # Used by GitLab's compile-production-assets and compile-test-assets jobs
-ruby-2.6.6-git-2.28-lfs-2.9-node-12.18-yarn-1.22-graphicsmagick-1.3.34: *build_and_deploy_custom
 ruby-2.7.2-git-2.28-lfs-2.9-node-12.18-yarn-1.22-graphicsmagick-1.3.34: *build_and_deploy_custom
-ruby-2.6.6-git-2.29-lfs-2.9-node-12.18-yarn-1.22-graphicsmagick-1.3.34: *build_and_deploy_custom
 ruby-2.7.2-git-2.29-lfs-2.9-node-12.18-yarn-1.22-graphicsmagick-1.3.34: *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