diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 000000000..e3a9628ac
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,169 @@
+version: 2
+
+aliases:
+  - &defaults
+    docker:
+      - image: circleci/ruby:2.5.1-stretch-node
+        environment: &ruby_environment
+          BUNDLE_APP_CONFIG: ./.bundle/
+          RAILS_ENV: test
+          NODE_ENV: test
+          DB_HOST: localhost
+          DB_USER: root
+          LOCAL_DOMAIN: cb6e6126.ngrok.io
+          LOCAL_HTTPS: true
+          PARALLEL_TEST_PROCESSORS: 2
+          ALLOW_NOPAM: true
+    working_directory: ~/projects/mastodon/
+
+  - &attach_workspace
+    attach_workspace:
+      at: ~/projects/
+
+  - &persist_to_workspace
+    persist_to_workspace:
+      root: ~/projects/
+      paths:
+        - ./mastodon/
+
+  - &install_steps
+    steps:
+      - checkout
+      - *attach_workspace
+
+      - restore_cache:
+          keys:
+            - v1-node-dependencies-{{ checksum "yarn.lock" }}
+            - v1-node-dependencies-
+      - run: yarn install --frozen-lockfile
+      - save_cache:
+          key: v1-node-dependencies-{{ checksum "yarn.lock" }}
+          paths:
+            - ./node_modules/
+
+      - *persist_to_workspace
+
+  - &install_system_dependencies
+      run:
+        name: Install system dependencies
+        command: |
+          sudo apt-get update
+          sudo apt-get install -y libicu-dev libidn11-dev libprotobuf-dev protobuf-compiler
+
+  - &install_ruby_dependencies
+      steps:
+        - *attach_workspace
+
+        - *install_system_dependencies
+
+        - run: ruby -e 'puts RUBY_VERSION' | tee /tmp/.ruby-version
+        - restore_cache:
+            keys:
+              - v1-ruby-dependencies-{{ checksum "/tmp/.ruby-version" }}-{{ checksum "Gemfile.lock" }}
+              - v1-ruby-dependencies-{{ checksum "/tmp/.ruby-version" }}-
+              - v1-ruby-dependencies--
+        - run: bundle install --clean --jobs 16 --path ./vendor/bundle/ --retry 3 --with pam_authentication --without development production
+        - save_cache:
+            key: v1-ruby-dependencies-{{ checksum "/tmp/.ruby-version" }}-{{ checksum "Gemfile.lock" }}
+            paths:
+              - ./vendor/bundle/
+
+        - run:
+            name: Precompile Assets
+            command: |
+              if [ ! -d ./public/assets/ -o ! -d ./public/packs-test/ ]; then
+                ./bin/rails assets:precompile
+              fi
+
+        - *persist_to_workspace
+
+  - &test_steps
+      steps:
+        - *attach_workspace
+
+        - *install_system_dependencies
+        - run: sudo apt-get install -y ffmpeg
+
+        - run:
+            name: Prepare Tests
+            command: ./bin/rails parallel:create parallel:load_schema parallel:prepare
+        - run:
+            name: Run Tests
+            command: bundle exec parallel_test ./spec/ --group-by filesize --type rspec
+
+jobs:
+  install:
+    <<: *defaults
+    <<: *install_steps
+
+  install-ruby2.5:
+    <<: *defaults
+    <<: *install_ruby_dependencies
+
+  install-ruby2.4:
+    <<: *defaults
+    docker:
+      - image: circleci/ruby:2.4.4-stretch-node
+        environment: *ruby_environment
+    <<: *install_ruby_dependencies
+
+  test-ruby2.5:
+    <<: *defaults
+    docker:
+      - image: circleci/ruby:2.5.1-stretch-node
+        environment: *ruby_environment
+      - image: circleci/postgres:10.3-alpine
+        environment:
+          POSTGRES_USER: root
+      - image: circleci/redis:4.0.9-alpine
+    <<: *test_steps
+
+  test-ruby2.4:
+    <<: *defaults
+    docker:
+      - image: circleci/ruby:2.4.4-stretch-node
+        environment: *ruby_environment
+      - image: circleci/postgres:10.3-alpine
+        environment:
+          POSTGRES_USER: root
+      - image: circleci/redis:4.0.9-alpine
+    <<: *test_steps
+
+  test-webui:
+    <<: *defaults
+    docker:
+      - image: circleci/node:8.11.1-stretch
+    steps:
+      - *attach_workspace
+      - run: yarn test:jest
+
+  check-i18n:
+    <<: *defaults
+    steps:
+      - *attach_workspace
+      - run: bundle exec i18n-tasks check-normalized
+      - run: bundle exec i18n-tasks unused
+
+workflows:
+  version: 2
+  build-and-test:
+    jobs:
+      - install
+      - install-ruby2.5:
+          requires:
+            - install
+      - install-ruby2.4:
+          requires:
+            - install-ruby2.5
+      - test-ruby2.5:
+          requires:
+            - install-ruby2.5
+      - test-ruby2.4:
+          requires:
+            - install-ruby2.4
+      - test-webui:
+          requires:
+            - install
+      - check-i18n:
+          requires:
+            - install-ruby2.5
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 2addd9ba2..000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,60 +0,0 @@
-language: ruby
-cache:
-  bundler: true
-  yarn: true
-  directories:
-    - node_modules
-    - public/assets
-    - public/packs-test
-    - tmp/cache/babel-loader
-dist: trusty
-sudo: false
-branches:
-  only:
-    - master
-
-notifications:
-  email: false
-
-env:
-  global:
-    - LOCAL_DOMAIN=cb6e6126.ngrok.io
-    - LOCAL_HTTPS=true
-    - RAILS_ENV=test
-    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
-    - PARALLEL_TEST_PROCESSORS=2
-    - ALLOW_NOPAM=true
-
-addons:
-  postgresql: 9.4
-  apt:
-    sources:
-      - trusty-media
-      - sourceline: deb https://dl.yarnpkg.com/debian/ stable main
-        key_url: https://dl.yarnpkg.com/debian/pubkey.gpg
-    packages:
-      - ffmpeg
-      - libicu-dev
-      - libprotobuf-dev
-      - protobuf-compiler
-      - yarn
-
-rvm:
-  - 2.4.3
-  - 2.5.0
-
-services:
-  - redis-server
-
-install:
-  - nvm install
-  - bundle install --path=vendor/bundle --with pam_authentication --without development production --retry=3 --jobs=16
-  - yarn install
-
-before_script:
-  - ./bin/rails parallel:create parallel:load_schema parallel:prepare assets:precompile
-
-script:
-  - travis_retry bundle exec parallel_test spec/ --group-by filesize --type rspec
-  - yarn run test:jest
-  - bundle exec i18n-tasks check-normalized && bundle exec i18n-tasks unused