diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..e046da4
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,24 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    name: ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 5
+    strategy:
+      matrix:
+        os: [macOS-latest, windows-latest, ubuntu-latest]
+    steps:
+      - uses: actions/checkout@master
+      - uses: denolib/setup-deno@master
+        with:
+          deno-version: 1.0.2
+
+      - run: deno -V
+      
+      - if: matrix.os == 'ubuntu-latest'
+        run: deno fmt --check
+
+      - run: deno test -A --unstable