diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 000000000..99a987753
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,30 @@
+name: Unit Tests
+
+on: [push, pull_request]
+jobs:
+  build:
+    name: "Ruby: ${{ matrix.ruby }} OS: ${{ matrix.os }}"
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+        ruby: ["2.3", "2.4", "2.5", "2.6", "2.7"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+        with:
+          fetch-depth: 10
+      - name: Select Ruby Version
+        uses: eregon/use-ruby-action@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          base: update
+      - name: Update RubyGems & Bundler
+        run: gem update --system --no-document --conservative
+      - name: Install Dependencies
+        run: bundle install --jobs=3 --retry=3
+      - name: Run Test
+        run: ruby -v && bundle exec rake
+        env:
+          CI: true
diff --git a/.github/workflows/linux.yaml b/.github/workflows/linux.yaml
deleted file mode 100644
index ceecb3e5f..000000000
--- a/.github/workflows/linux.yaml
+++ /dev/null
@@ -1,32 +0,0 @@
-name: Linux
-
-on: [push, pull_request]
-jobs:
-  build:
-    name: >-
-      Linux | Ruby: ${{ matrix.ruby }}
-    runs-on: "ubuntu-latest"
-    strategy:
-      fail-fast: false
-      matrix:
-        ruby: ["2.4.x", "2.5.x", "2.6.x", "9.9.x"]
-    steps:
-      - name: repo checkout
-        uses: actions/checkout@v1
-        with:
-          fetch-depth: 10
-      - name: load ruby, update gcc
-        uses: MSP-Greg/actions-ruby@master
-        with:
-          ruby-version: ${{ matrix.ruby }}
-          base: update
-      - name: update RubyGems, Bundler
-        run: gem update --system --no-document --conservative
-      - name: bundle install
-        run: bundle install --jobs=3 --retry=3
-      - name: test
-        run: |
-          ruby -v
-          bundle exec rake
-        env:
-          CI: true
diff --git a/.github/workflows/macos.yaml b/.github/workflows/macos.yaml
deleted file mode 100644
index 49e6c4a8d..000000000
--- a/.github/workflows/macos.yaml
+++ /dev/null
@@ -1,32 +0,0 @@
-name: macOS
-
-on: [push, pull_request]
-jobs:
-  build:
-    name: >-
-      macOS | Ruby: ${{ matrix.ruby }}
-    runs-on: "macos-latest"
-    strategy:
-      fail-fast: false
-      matrix:
-        ruby: ["2.4.x", "2.5.x", "2.6.x", "9.9.x"]
-    steps:
-      - name: repo checkout
-        uses: actions/checkout@v1
-        with:
-          fetch-depth: 10
-      - name: load ruby, update gcc
-        uses: MSP-Greg/actions-ruby@master
-        with:
-          ruby-version: ${{ matrix.ruby }}
-          base: update
-      - name: update RubyGems, Bundler
-        run: gem update --system --no-document --conservative
-      - name: bundle install
-        run: bundle install --jobs=3 --retry=3
-      - name: test
-        run: |
-          ruby -v
-          bundle exec rake
-        env:
-          CI: true
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
deleted file mode 100644
index ab81830fd..000000000
--- a/.github/workflows/windows.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-name: Windows
-
-on: [push, pull_request]
-jobs:
-  build:
-    name: >-
-      Windows | Ruby: ${{ matrix.ruby }}
-    runs-on: "windows-latest"
-    strategy:
-      fail-fast: false
-      matrix:
-        ruby: ["2.4.x", "2.5.x", "2.6.x", "9.9.x"]
-    steps:
-      - name: repo checkout
-        uses: actions/checkout@v1
-        with:
-          fetch-depth: 10
-      - name: load ruby, update gcc
-        uses: MSP-Greg/actions-ruby@master
-        with:
-          ruby-version: ${{ matrix.ruby }}
-          base: update
-      - name: update RubyGems, Bundler
-        run: gem update --system --no-document --conservative
-      - name: bundle install
-        run: bundle install --jobs=3 --retry=3
-      - name: test
-        run: |
-          ruby -v
-          bundle exec rake
-        env:
-          CI: true