diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
new file mode 100644
index 0000000000..e161bdd4f3
--- /dev/null
+++ b/.github/workflows/macos.yml
@@ -0,0 +1,15 @@
+name: macos
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Install dependencies
+      run: |
+        gem install bundler --no-document
+        bundle install
+    - name: Run test
+      run: rake
diff --git a/.github/workflows/ubuntu-rvm.yml b/.github/workflows/ubuntu-rvm.yml
new file mode 100644
index 0000000000..b27cfd44e5
--- /dev/null
+++ b/.github/workflows/ubuntu-rvm.yml
@@ -0,0 +1,29 @@
+name: ubuntu-rvm
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: [ 'jruby-9.2.6.0', 'jruby-9.1.17.0', 'ruby-head' ]
+    steps:
+    - uses: actions/checkout@master
+    - name: Set up RVM
+      run: |
+        curl -sSL https://get.rvm.io | bash
+    - name: Set up Ruby
+      run: |
+        source $HOME/.rvm/scripts/rvm
+        rvm install ${{ matrix.ruby }} --binary
+        rvm --default use ${{ matrix.ruby }}
+    - name: Install dependencies
+      run: |
+        source $HOME/.rvm/scripts/rvm
+        gem install bundler --no-document
+        bundle install
+    - name: Run test
+      run: |
+        source $HOME/.rvm/scripts/rvm
+        rake
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
new file mode 100644
index 0000000000..6f08a83341
--- /dev/null
+++ b/.github/workflows/ubuntu.yml
@@ -0,0 +1,22 @@
+name: ubuntu
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: [ '2.6.x', '2.5.x', '2.4.x', '2.3.x' ]
+    steps:
+    - uses: actions/checkout@master
+    - name: Set up Ruby
+      uses: actions/setup-ruby@v1
+      with:
+        version: ${{ matrix.ruby }}
+    - name: Install dependencies
+      run: |
+        gem install bundler --no-document
+        bundle install
+    - name: Run test
+      run: rake
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
new file mode 100644
index 0000000000..fd22991df6
--- /dev/null
+++ b/.github/workflows/windows.yml
@@ -0,0 +1,22 @@
+name: windows
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        ruby: [ '2.6.x', '2.5.x', '2.4.x' ]
+    steps:
+    - uses: actions/checkout@master
+    - name: Set up Ruby
+      uses: actions/setup-ruby@v1
+      with:
+        version: ${{ matrix.ruby }}
+    - name: Set up Bundler
+      run: gem install bundler --no-document
+    - name: Install dependencies
+      run: bundle install
+    - name: Run test
+      run: rake
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 0a2e5bc5e8..0000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,22 +0,0 @@
----
-before_install:
-  - gem update --system
-  - gem update bundler
-language: ruby
-rvm:
-  - 2.3.8
-  - 2.4.6
-  - 2.5.5
-  - 2.6.3
-  - ruby-head
-  - jruby-9.1.17.0
-  - jruby-9.2.6.0
-env:
-  global:
-    NOBENCHMARK=1
-script: rake
-matrix:
-  allow_failures:
-    - rvm: jruby-9.1.17.0
-    - rvm: jruby-9.2.6.0
-    - rvm: ruby-head
diff --git a/Gemfile b/Gemfile
index fa75df1563..4813c63655 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,12 @@
 source 'https://rubygems.org'
 
 gemspec
+
+group :development do
+  gem "rake"
+  gem "racc", "> 1.4.10"
+  gem "kpeg"
+  gem "test-unit"
+  gem "minitest" # for test_rdoc_rubygems_hook.rb
+  gem "rubocop"
+end
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 332d7ab538..0000000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,40 +0,0 @@
----
-image: Visual Studio 2017
-
-clone_depth: 50
-
-init:
-  # Set UTF-8 to use Unicode property because the default encoding on AppVeyor is Encoding::IBM437
-  - set RUBYOPT=-EUTF-8
-  # To avoid duplicated executables in PATH, see https://github.com/ruby/spec/pull/468
-  - set PATH=C:\Ruby%ruby_version%\bin;C:\msys64\usr\bin;C:\Program Files\7-Zip;C:\Program Files\AppVeyor\BuildAgent;C:\Program Files\Git\cmd;C:\Windows\system32;C:\Program Files;C:\Windows
-  # Loads trunk build and updates MSYS2 / MinGW to most recent gcc compiler
-  - if %ruby_version%==_trunk (
-      appveyor DownloadFile %APPVEYOR_URL%/api/projects/MSP-Greg/ruby-loco/artifacts/ruby_trunk.7z -FileName C:\ruby_trunk.7z &
-      7z x C:\ruby_trunk.7z -oC:\Ruby_trunk)
-
-install:
-  - bundle install
-
-build: off
-
-test_script:
-  - rake
-
-on_finish:
-  - "echo Build Image %APPVEYOR_BUILD_WORKER_IMAGE% & ruby -v"
-
-deploy: off
-
-environment:
-  NOBENCHMARK: 1
-  matrix:
-    - ruby_version: 23
-    - ruby_version: 23-x64
-    - ruby_version: 24
-    - ruby_version: 24-x64
-    - ruby_version: 25
-    - ruby_version: 25-x64
-    - ruby_version: 26
-    - ruby_version: 26-x64
-    - ruby_version: _trunk
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
deleted file mode 100644
index 1d3ec008ec..0000000000
--- a/azure-pipelines.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-jobs:
-- job: macOS
-  pool:
-    vmImage: 'macos-10.13'
-  steps:
-  - script: |
-      gem install bundler
-      bundle install --retry=3 --jobs=4
-    displayName: 'bundle install'
-  - script: rake
-    displayName: 'rake'
diff --git a/rdoc.gemspec b/rdoc.gemspec
index 99bf3a63f5..a6777d6899 100644
--- a/rdoc.gemspec
+++ b/rdoc.gemspec
@@ -53,10 +53,4 @@ RDoc includes the +rdoc+ and +ri+ tools for generating and displaying documentat
   s.required_ruby_version = Gem::Requirement.new(">= 2.2.2")
   s.rubygems_version = "2.5.2"
   s.required_rubygems_version = Gem::Requirement.new(">= 2.2")
-
-  s.add_development_dependency("rake")
-  s.add_development_dependency("racc", "> 1.4.10")
-  s.add_development_dependency("kpeg")
-  s.add_development_dependency("minitest", "~> 5")
-  s.add_development_dependency("rubocop")
 end