diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
new file mode 100644
index 0000000..12a82aa
--- /dev/null
+++ b/.github/workflows/test.yaml
@@ -0,0 +1,84 @@
+name: Test
+
+on:
+  push:
+    branches:
+      - "main"
+  pull_request:
+
+defaults:
+  run:
+    shell: bash
+
+env:
+  LLVM_VERSION: 15
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        os:
+          - "ubuntu-22.04"  # https://github.com/actions/runner-images/blob/main/images/linux/Ubuntu2204-Readme.md
+          - "macos-13"      # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-Readme.md
+        go-version:
+          - "1.20.x"
+          - "1.21.x"
+      fail-fast: false
+
+    runs-on:
+      labels: ${{ matrix.os }}
+
+    env:
+      # for Homebrew: https://docs.brew.sh/Manpage
+      HOMEBREW_PREFIX: /usr/local
+      HOMEBREW_CURL_VERBOSE: 1
+      HOMEBREW_DEVELOPER: 1
+      HOMEBREW_DISPLAY_INSTALL_TIMES: 1
+      HOMEBREW_NO_ANALYTICS: 1
+      HOMEBREW_NO_AUTO_UPDATE: 1
+      HOMEBREW_NO_INSTALL_CLEANUP: 1
+      HOMEBREW_NO_INSTALL_UPGRADE: 1
+      HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK: 1
+      HOMEBREW_VERBOSE: 1
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Install Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: ${{ matrix.go-version }}
+        check-latest: true
+
+    - name: Setup install LLVM
+      if: matrix.os == 'ubuntu-22.04'
+      run: |
+        if ! command -v brew > /dev/null 2>&1; then
+          /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+          echo "PATH=/home/linuxbrew/.linuxbrew/bin:$PATH" >> ${GITHUB_ENV}
+        fi
+        echo "HOMEBREW_CACHE=${HOME}/.cache/Homebrew" >> ${GITHUB_ENV}
+        echo "CPPFLAGS=-I${HOMEBREW_PREFIX}/opt/llvm@15/include:${CPPFLAGS}" >> ${GITHUB_ENV}
+        echo "LDFLAGS=-L${HOMEBREW_PREFIX}/opt/llvm@15/lib:${LDFLAGS}" >> ${GITHUB_ENV}
+
+    - name: Install latest LLVM toolchain
+      if: matrix.os == 'ubuntu-22.04'
+      run: |
+        mkdir -p ${HOMEBREW_CACHE}
+        brew install llvm@${LLVM_VERSION}
+
+    - name: Cache brewed LLVM 
+      uses: actions/cache@v3
+      with:
+        key: ${{ matrix.os }}-homebrew
+        path: $[HOMEBREW_CACHE}
+
+    - name: Test
+      if: matrix.os == 'ubuntu-22.04'
+      run: |
+        docker container run -t \
+          --mount type=bind,src=$PWD,dst=/go/src/github.com/go-clang/clang-v${LLVM_VERSION} \
+          --workdir /go/src/github.com/go-clang/clang-v${LLVM_VERSION} \
+          ghcr.io/go-clang/base:${LLVM_VERSION} \
+          make test
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
deleted file mode 100644
index eb19ca0..0000000
--- a/.github/workflows/test.yml
+++ /dev/null
@@ -1,25 +0,0 @@
-name: Test
-
-on:
-  push:
-    branches:
-      - "main"
-  pull_request:
-    branches:
-      - "main"
-
-env:
-  LLVM_VERSION: 15
-
-jobs:
-  test:
-    name: test
-    runs-on: ubuntu-20.04
-
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v2
-
-    - name: Test in Docker
-      run: |
-        docker container run -t --mount type=bind,src=$PWD,dst=/go/src/github.com/go-clang/clang-v${LLVM_VERSION} -w /go/src/github.com/go-clang/clang-v${LLVM_VERSION} ghcr.io/go-clang/base:${LLVM_VERSION} make test