diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fac19a14..5b0215b6 100755
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -7,42 +7,22 @@ on:
         - master
 
 jobs:
-  stack:
-    name: Stack
-    runs-on: ${{ matrix.os }}
+  macos-latest:
+    name: macos-latest-llvm@12
+    runs-on: moacos-latest
+    concurrency: strategy
     strategy:
-      fail-fast: false
-      matrix:
-        os:
-          #- ubuntu-latest
-          - macos-latest
-          #- windows-latest
-        resolver:
-        # Missing some packages now
-        #- "--resolver nightly"
-        - lts-18.16 # Win32 issue
-        - lts-16
-        stack-yaml:
-        - stack.yaml
-        - stack-new-time.yaml
-        exclude:
-        - resolver: lts-16
-          stack-yaml: stack-new-time.yaml
-        - os: windows-latest
-          stack-yaml: stack-new-time.yaml
-
-    steps:
+      newest: lts-19
+      oldest: lts-18
+    steps: &steps
       - name: Clone project
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Install LLVM 12
+        if: job.name == macos-latest-llvm@12
         shell: bash
         run: |
           set -ex
-          echo "$(brew --prefix)"
           brew install llvm@12
-          ls -F "$(brew --prefix)"
-          ls -F "$(brew --prefix)/opt"
-          ls -F "$(brew --prefix)/opt/llvm@12"
           echo "/opt/homebrew/opt/llvm@12/bin" >> "${GITHUB_PATH}"
           echo LDFLAGS="-L/opt/homebrew/opt/llvm@12/lib" >> "${GITHUB_ENV}"
           echo CPPFLAGS="-I/opt/homebrew/opt/llvm@12/include" >> "${GITHUB_ENV}"
@@ -53,10 +33,78 @@ jobs:
           stack-version: 'latest'
           stack-no-global: true
           cabal-update: false
+      - name: Install stack-all
+        shell: bash
+        run: |
+          set -ex
+          stack --version
+          stack install stack-all
+          stack-all --version
       - name: Build and run tests
         shell: bash
         run: |
-            set -ex
-            echo $PATH
-            stack --version
-            stack test --fast --no-terminal --stack-yaml=${{ matrix.stack-yaml }} --resolver=${{ matrix.resolver }}
+          set -ex
+          stack-all --oldest ${{ strategy.oldest }} --newest ${{ strategy.newest }}
+
+#  macos-13:
+#    name: macos-13
+#    runs-on: macos-13
+#    concurrency: strategy
+#    strategy:
+#      fail-fast: true
+#        oldest: lts-16
+#
+#  stack:
+#    name: Stack
+#    runs-on: ${{ matrix.os }}
+#    strategy:
+#      fail-fast: false
+#      matrix:
+#        os:
+#          #- ubuntu-latest
+#          - macos-13
+#          - macos-latest
+#          #- windows-latest
+#        resolver:
+#        - lts-18.16 # Win32 issue
+#        - lts-16
+#        stack-yaml:
+#        - stack.yaml
+#        - stack-new-time.yaml
+#        exclude:
+#        - resolver: lts-16
+#          stack-yaml: stack-new-time.yaml
+#        - os: windows-latest
+#          stack-yaml: stack-new-time.yaml
+#        - os: macos-latest
+#          resolver: lts-16
+#
+#    steps:
+#      - name: Clone project
+#        uses: actions/checkout@v2
+#      - name: Install LLVM 12
+#        shell: bash
+#        run: |
+#          set -ex
+#          echo "$(brew --prefix)"
+#          brew install llvm@12
+#          ls -F "$(brew --prefix)"
+#          ls -F "$(brew --prefix)/opt"
+#          ls -F "$(brew --prefix)/opt/llvm@12"
+#          echo "/opt/homebrew/opt/llvm@12/bin" >> "${GITHUB_PATH}"
+#          echo LDFLAGS="-L/opt/homebrew/opt/llvm@12/lib" >> "${GITHUB_ENV}"
+#          echo CPPFLAGS="-I/opt/homebrew/opt/llvm@12/include" >> "${GITHUB_ENV}"
+#      - name: Setup Haskell
+#        uses: haskell-actions/setup@v2.7.5
+#        with:
+#          enable-stack: true
+#          stack-version: 'latest'
+#          stack-no-global: true
+#          cabal-update: false
+#      - name: Build and run tests
+#        shell: bash
+#        run: |
+#            set -ex
+#            echo $PATH
+#            stack --version
+#            stack test --fast --no-terminal --stack-yaml=${{ matrix.stack-yaml }} --resolver=${{ matrix.resolver }}