diff --git a/.github/test.sh b/.github/test.sh
new file mode 100755
index 0000000..184bbad
--- /dev/null
+++ b/.github/test.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env sh
+
+set -e
+
+cd $(dirname "$0")/..
+
+run_sim() {
+  echo "::group::Test $1"
+  cd "$1"/sim/vhdl
+  $MAKE sim
+  cd ../../..
+  echo '::endgroup::'
+}
+
+for item in aes cbcdes cbcmac_des cbctdes des tdes; do
+  run_sim $item
+done
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..aa591a3
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,57 @@
+name: 'test'
+
+on:
+  push:
+  pull_request:
+
+jobs:
+
+
+  lin:
+    runs-on: ubuntu-latest
+    steps:
+
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
+
+    - name: Install dependencies
+      run: |
+        sudo apt update -qq
+        sudo apt install -y libssl-dev
+
+    - uses: ghdl/setup-ghdl-ci@master
+      with:
+        backend: llvm
+
+    - run: ./.github/test.sh
+      env:
+        MAKE: make
+
+
+  win:
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: msys2 {0}
+    steps:
+
+    - uses: msys2/setup-msys2@v2
+      with:
+        msystem: MINGW64
+        update: true
+        install: >
+          mingw-w64-x86_64-make
+          mingw-w64-x86_64-ghdl-llvm
+          mingw-w64-x86_64-openssl
+
+    - run: git config --global core.autocrlf input
+      shell: bash
+
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
+
+    - run: ./.github/test.sh
+      env:
+        MAKE: mingw32-make