diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 761f9e2..0501170 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -29,12 +29,14 @@ before_script:
 
 ruby-2.1-git-2.7-phantomjs-2.1 test: *test_build
 ruby-2.3-git-2.7-phantomjs-2.1 test: *test_build
+ruby-2.3.3-git-2.7-phantomjs-2.1 test: *test_build
 ruby-2.3-static-analyses test: *test_build
 www-gitlab-com test: *test_build
 doc-gitlab-com test: *test_build
 
 ruby-2.1-git-2.7-phantomjs-2.1: *build_and_deploy
 ruby-2.3-git-2.7-phantomjs-2.1: *build_and_deploy
+ruby-2.3.3-git-2.7-phantomjs-2.1: *build_and_deploy
 ruby-2.3-static-analyses: *build_and_deploy
 www-gitlab-com: *build_and_deploy
 doc-gitlab-com: *build_and_deploy
diff --git a/Dockerfile.ruby-2.3.3-git-2.7-phantomjs-2.1-node-7.1 b/Dockerfile.ruby-2.3.3-git-2.7-phantomjs-2.1-node-7.1
new file mode 100644
index 0000000..0c846ab
--- /dev/null
+++ b/Dockerfile.ruby-2.3.3-git-2.7-phantomjs-2.1-node-7.1
@@ -0,0 +1,11 @@
+FROM ruby:2.3.3
+
+ADD / /
+RUN /scripts/install-essentials
+RUN /scripts/install-phantomjs 2.1.1
+RUN /scripts/install-node
+
+RUN locale-gen en_US.UTF-8
+ENV LANG en_US.UTF-8
+ENV LANGUAGE en_US:en
+ENV LC_ALL en_US.UTF-8