diff --git a/.cirrus.yml b/.cirrus.yml
index a8cd2175bee..e187dde0770 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -9,86 +9,6 @@ test_template: &DEFAULT_TEST_SETTINGS
   # don't cancel the task execution if it's master or a release branch
   auto_cancellation: $CIRRUS_BRANCH != 'master' && $CIRRUS_BRANCH !=~ 'v\d+\.\d+.*'
 
-test_linux_task:
-  <<: *DEFAULT_TEST_SETTINGS
-
-  container:
-    image: buildpack-deps:trusty
-    cpu: 8
-    memory: 1536Mi
-
-  env:
-    PATH: "${CIRRUS_WORKING_DIR}/otp/bin:${PATH}"
-
-  matrix:
-    - name: Linux, ${OTP_RELEASE}, Ubuntu 14.04
-      alias: Linux Stable
-      matrix:
-        - env:
-            CHECK_POSIX_COMPLIANT: true
-            CHECK_REPRODUCIBLE: true
-            OTP_RELEASE: OTP-23.0
-        - env:
-            OTP_RELEASE: OTP-22.3
-        - env:
-            OTP_RELEASE: OTP-22.0
-        - env:
-            OTP_RELEASE: OTP-21.3.8
-        - env:
-            OTP_RELEASE: OTP-21.0
-
-    - name: Linux, OTP-${OTP_RELEASE}, development, Ubuntu 14.04
-      alias: Linux Development
-      allow_failures: true
-      skip_notifications: true
-      depends_on:
-        - Linux Stable
-        - FreeBSD Stable
-      matrix:
-        - env:
-            OTP_RELEASE: master
-        - env:
-            OTP_RELEASE: maint
-
-  install_script:
-    - wget -O otp.tar.gz https://repo.hex.pm/builds/otp/ubuntu-14.04/${OTP_RELEASE}.tar.gz
-    - mkdir -p otp
-    - tar zxf otp.tar.gz -C otp --strip-components=1
-    - otp/Install -minimal ${CIRRUS_WORKING_DIR}/otp
-    - rm -rf .git
-    - make compile
-
-  build_info_script: bin/elixir --version
-
-  test_formatted_script:
-    - make test_formatted &&
-      echo "All Elixir source code files are properly formatted."
-
-  dialyzer_script: dialyzer -pa lib/elixir/ebin --build_plt --output_plt elixir.plt --apps lib/elixir/ebin/elixir.beam lib/elixir/ebin/Elixir.Kernel.beam
-
-  test_erlang_script: make test_erlang
-
-  test_elixir_script: make test_elixir
-
-  check_posix_compliant_script: |
-    if [ -n "$CHECK_POSIX_COMPLIANT" ]; then
-      apt update
-      apt install -y shellcheck
-      shellcheck -e SC2039,2086 bin/elixir && echo "bin/elixir is POSIX compliant"
-      shellcheck bin/elixirc && echo "bin/elixirc is POSIX compliant"
-      shellcheck bin/iex && echo "bin/iex is POSIX compliant"
-    else
-      echo "The format of the shell scripts is only checked in the last stable Erlang/OTP version."
-    fi
-
-  check_reproducible_script: |
-    if [ -n "$CHECK_REPRODUCIBLE" ]; then
-      taskset 1 make check_reproducible
-    else
-      echo "The reproducibility of the build is only checked in the last stable Erlang/OTP version."
-    fi
-
-
 test_windows_task:
   <<: *DEFAULT_TEST_SETTINGS
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000000..90bd8bd26a3
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,70 @@
+name: CI
+
+on: [pull_request, push]
+
+env:
+  ELIXIR_ASSERT_TIMEOUT: 2000
+  ELIXIRC_OPTS: "--warnings-as-errors"
+  ERLC_OPTS: "warnings_as_errors"
+  LANG: C.UTF-8
+
+jobs:
+  test:
+    name: Linux, ${{ matrix.otp_release }}, Ubuntu 16.04
+    continue-on-error: ${{ matrix.development }}
+    strategy:
+      matrix:
+        otp_release: ['OTP-23.0', 'OTP-22.3', 'OTP-22.0', 'OTP-21.3.8', 'OTP-21.0']
+        development: [false]
+        include:
+          - otp_release: master
+            development: true
+          - otp_release: maint
+            development: true
+    runs-on: ubuntu-16.04
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          fetch-depth: 50
+      - name: Install Erlang/OTP
+        run: |
+          cd $RUNNER_TEMP
+          wget -O otp.tar.gz https://repo.hex.pm/builds/otp/ubuntu-14.04/${{ matrix.otp_release }}.tar.gz
+          mkdir -p otp
+          tar zxf otp.tar.gz -C otp --strip-components=1
+          otp/Install -minimal $(pwd)/otp
+          echo "::add-path::$(pwd)/otp/bin"
+      - name: Compile Elixir
+        run: |
+          rm -rf .git
+          make compile
+      - name: Build info
+        run: bin/elixir --version
+      - name: Check format
+        run: make test_formatted && echo "All Elixir source code files are properly formatted."
+      - name: Dyalizer
+        run: dialyzer -pa lib/elixir/ebin --build_plt --output_plt elixir.plt --apps lib/elixir/ebin/elixir.beam lib/elixir/ebin/Elixir.Kernel.beam
+      - name: Erlang test suite
+        run: make test_erlang
+      - name: Elixir test suite
+        run: make test_elixir
+      - name: Check reproducible builds
+        run: taskset 1 make check_reproducible
+        if: matrix.otp_release == 'OTP-23.0'
+
+  check_posix_compliant:
+    name: Check POSIX-compliant
+    runs-on: ubuntu-16.04
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          fetch-depth: 50
+      - name: Install Shellcheck
+        run: |
+          sudo apt update
+          sudo apt install -y shellcheck
+      - name: Check POSIX-compliant
+        run: |
+          shellcheck -e SC2039,2086 bin/elixir && echo "bin/elixir is POSIX compliant"
+          shellcheck bin/elixirc && echo "bin/elixirc is POSIX compliant"
+          shellcheck bin/iex && echo "bin/iex is POSIX compliant"