diff --git a/.azure/azure-linux-template.yml b/.azure/azure-linux-template.yml
deleted file mode 100644
index bad9eba..0000000
--- a/.azure/azure-linux-template.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  timeoutInMinutes: 180
-  pool:
-    vmImage: ${{ parameters.vmImage }}
-  strategy:
-    matrix:
-      stack-lts-9:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-9"
-      stack-lts-11:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-11"
-      stack-lts-12:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-12"
-      stack-lts-14:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-14"
-      nightly:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver nightly"
-    maxParallel: 6
-  steps:
-  - script: |
-      export STACK_ROOT="$(Build.SourcesDirectory)"/.stack-root;
-      export PATH=$HOME/.local/bin:$PATH
-      mkdir -p ~/.local/bin
-      curl -L https://get.haskellstack.org/stable/linux-x86_64.tar.gz | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
-      stack $ARGS test --bench --no-run-benchmarks --haddock --no-haddock-deps
-    env:
-      OS_NAME: ${{ parameters.os }}
-    displayName: 'Build and test'
diff --git a/.azure/azure-osx-template.yml b/.azure/azure-osx-template.yml
deleted file mode 100644
index 8f45c1c..0000000
--- a/.azure/azure-osx-template.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  timeoutInMinutes: 120
-  pool:
-    vmImage: ${{ parameters.vmImage }}
-  strategy:
-    matrix:
-      stack-lts-9:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-9"
-      stack-lts-11:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-11"
-      stack-lts-12:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-12"
-      stack-lts-14:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-14"
-      stack-nightly:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver nightly"
-    maxParallel: 3
-  steps:
-  - script: |
-      export PATH=$HOME/.local/bin:$PATH
-      export STACK_ROOT="$(Build.SourcesDirectory)"/.stack-root;
-      mkdir -p ~/.local/bin
-      curl -skL https://get.haskellstack.org/stable/osx-x86_64.tar.gz | tar xz --strip-components=1 --include '*/stack' -C ~/.local/bin;
-      stack $ARGS test --bench --no-run-benchmarks --haddock --no-haddock-deps
-    env:
-      OS_NAME: ${{ parameters.os }}
-    displayName: 'Build and test'
diff --git a/.azure/azure-pipelines.yml b/.azure/azure-pipelines.yml
deleted file mode 100644
index 870176e..0000000
--- a/.azure/azure-pipelines.yml
+++ /dev/null
@@ -1,30 +0,0 @@
-# This is the complex Azure configuration, which is intended for use
-# on open source libraries which need compatibility across multiple GHC
-# versions, must work with cabal-install, and should be
-# cross-platform. For more information and other options, see:
-#
-# https://docs.haskellstack.org/en/stable/azure_ci/
-#
-# Copy these contents into the root directory of your Github project in a file
-# named azure-pipelines.yml
-#
-# For better organization, you split various jobs into seprate parts
-# and each of them are controlled via individual file.
-jobs:
-- template: azure-linux-template.yml
-  parameters:
-    name: Linux
-    vmImage: ubuntu-16.04
-    os: linux
-
-- template: azure-osx-template.yml
-  parameters:
-    name: macOS
-    vmImage: macOS-10.13
-    os: osx
-
-- template: azure-windows-template.yml
-  parameters:
-   name: Windows
-   vmImage: vs2017-win2016
-   os: windows
diff --git a/.azure/azure-windows-template.yml b/.azure/azure-windows-template.yml
deleted file mode 100644
index 4d36988..0000000
--- a/.azure/azure-windows-template.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  timeoutInMinutes: 120
-  pool:
-    vmImage: ${{ parameters.vmImage }}
-  strategy:
-    matrix:
-      stack-lts-11:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-11"
-      stack-lts-12:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-12"
-      stack-lts-14:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver lts-14"
-      stack-nightly:
-        BUILD: stack
-        STACK_YAML: stack.yaml
-        ARGS: "--resolver nightly"
-    maxParallel: 3
-  steps:
-  - bash: |
-      export STACK_ROOT="$(Build.SourcesDirectory)"/.stack-root;
-      curl -sSkL http://www.stackage.org/stack/windows-x86_64 -o /usr/bin/stack.zip
-      unzip -o /usr/bin/stack.zip -d /usr/bin/
-      stack $ARGS test --bench --no-run-benchmarks
-    env:
-      OS_NAME: ${{ parameters.os }}
-    displayName: 'Build and test'
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..22318cb
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,33 @@
+name: Tests
+
+on: [pull_request, push]
+
+jobs:
+  build:
+    name: CI
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        resolver: [nightly, lts-15, lts-14, lts-12, lts-11, lts-9]
+
+    steps:
+      - name: Setup Stack
+        uses: mstksg/setup-stack@v1
+
+      - name: Clone project
+        uses: actions/checkout@v2
+
+      - name: Cache dependencies
+        uses: actions/cache@v1
+        with:
+          path: ~/.stack
+          key: ${{ runner.os }}-${{ matrix.resolver }}-${{ hashFiles('stack.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-${{ matrix.resolver }}-
+
+      - name: Build and run tests
+        run: |
+            set -ex
+            stack test --fast --no-terminal --resolver=${{ matrix.resolver }}