diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 581c9268..8f719202 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,19 +11,9 @@ jobs:
     strategy:
       # Duplicate changes to this matrix to 'poc_tests'
       matrix:
-        os: [ubuntu-latest, macos-11, windows-latest]
-        python-version: ['3.9', '3.10']
+        os: [macos-11, macos-12, macos-13, macos-14]
+        python-version: ['3.10']
         compiler: [""]
-        include:
-          - os: ubuntu-latest
-            python-version: '3.8'
-          - os: ubuntu-latest
-            python-version: '3.10'
-            compiler: 'g++'
-          - os: ubuntu-latest
-            python-version: '3.11'
-          - os: ubuntu-latest
-            python-version: '3.12'
 
     steps:
       - uses: actions/checkout@v4
@@ -57,370 +47,3 @@ jobs:
         run: |
           python -m pip install pytest pytest-xdist filelock
           python -m pytest --basetemp=.tmpdir --durations=16 -n auto test/
-
-  main_tests_debug:
-    name: Main tests on CPython debug builds
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-        python-version: ['3.12', '3.11', '3.10', '3.9', '3.8']
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Python from deadsnakes
-        uses: deadsnakes/action@v2.1.1  # Upgrading will cause test failures.
-        with:
-          python-version: ${{ matrix.python-version }}
-          debug: true
-
-      - name: Check Python debug build
-        run: python -c "import sys; print(hasattr(sys, 'gettotalrefcount'))"
-
-      - name: Install/Upgrade Python dependencies
-        run: python -m pip install --upgrade pip wheel
-
-      - name: Build
-        run: |
-          make
-          python -m pip install .
-
-      - name: Run tests
-        run: |
-          python -m pip install pytest pytest-xdist filelock
-          python -m pytest --durations=16 -n auto test/
-
-  poc_tests:
-    name: Proof of concept tests
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macos-11, windows-latest]
-        python-version: ['3.10']
-        include:
-          - os: ubuntu-latest
-            python-version: '3.8'
-          - os: ubuntu-latest
-            python-version: '3.9'
-          - os: ubuntu-latest
-            python-version: '3.11'
-          - os: ubuntu-latest
-            python-version: '3.12'
-
-    steps:
-      - uses: actions/checkout@v4
-
-      # - template: azure-templates/ccache.yml
-      #   parameters:
-      #     pythonVersion: $(python.version)
-      # - template: azure-templates/python.yml
-      #   parameters:
-      #     pythonVersion: $(python.version)
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-          allow-prereleases: true
-
-      - name: Install/Upgrade Python dependencies
-        run: python -m pip install --upgrade pip wheel
-        shell: bash
-
-      - name: 'Test setup.py --hpy-abi=cpython bdist_wheel'
-        run: proof-of-concept/test_pof.sh wheel cpython
-        shell: bash
-
-      - name: 'Test setup.py --hpy-abi=universal bdist_wheel'
-        run: proof-of-concept/test_pof.sh wheel universal
-        shell: bash
-
-      - name: 'Test setup.py --hpy-abi=cpython install'
-        run: proof-of-concept/test_pof.sh setup_py_install cpython
-        shell: bash
-
-      - name: 'Test setup.py --hpy-abi=universal install'
-        run: proof-of-concept/test_pof.sh setup_py_install universal
-        shell: bash
-
-      - name: 'Test setup.py --hpy-abi=cpython build_ext --inplace'
-        run: proof-of-concept/test_pof.sh setup_py_build_ext_inplace cpython
-        shell: bash
-
-      - name: 'Test setup.py --hpy-abi=universal build_ext --inplace'
-        run: proof-of-concept/test_pof.sh setup_py_build_ext_inplace universal
-        shell: bash
-
-
-  porting_example_tests:
-    name: Porting example tests
-    runs-on: ${{ matrix.os }}
-    continue-on-error: true
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macos-11, windows-latest]
-        python-version: ['3.9']
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-
-      - name: Install/Upgrade Python dependencies
-        run: python -m pip install --upgrade pip wheel
-        shell: bash
-
-      - name: Install HPy
-        run: python -m pip install .
-
-      - name: Install pytest
-        run: |
-          python -m pip install pytest
-
-      - name: Run tests
-        run: make porting-example-tests
-        shell: bash
-
-      - name: Run tests of completed port in debug mode
-        env:
-          HPY_DEBUG: "1"
-          TEST_ARGS: "-s -k hpy_final"
-        run: make porting-example-tests
-        shell: bash
-
-
-  valgrind_tests_1:
-    name: 'Valgrind tests (1/3)'
-    uses: ./.github/workflows/valgrind-tests.yml
-    with:
-      portion: '1/3'
-
-
-  valgrind_tests_2:
-    name: 'Valgrind tests (2/3)'
-    uses: ./.github/workflows/valgrind-tests.yml
-    with:
-      portion: '2/3'
-
-
-  valgrind_tests_3:
-    name: 'Valgrind tests (3/3)'
-    uses: ./.github/workflows/valgrind-tests.yml
-    with:
-      portion: '3/3'
-
-
-  docs_examples_tests:
-    name: Documentation examples tests
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macos-11, windows-latest]
-        python-version: ['3.10']
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-
-      - name: Install/Upgrade Python dependencies
-        run: python -m pip install --upgrade pip wheel
-        shell: bash
-
-      - name: Install HPy
-        run: python -m pip install .
-
-      - name: Install pytest
-        run: |
-          python -m pip install pytest pytest-xdist filelock
-      - name: Run tests
-        run: make docs-examples-tests
-        shell: bash
-
-  build_docs:
-    name: Build documentation
-    runs-on: 'ubuntu-latest'
-    steps:
-      - uses: actions/checkout@v4
-
-      # - template: azure-templates/python.yml
-
-      - name: Install / Upgrade system requirements
-        run: sudo apt update && sudo apt install -y libclang-11-dev
-
-      - name: Install / Upgrade Python requirements
-        run: |
-          python -m pip install --upgrade pip
-          python -m pip install -r docs/requirements.txt
-
-      - name: Build docs
-        run: |
-          cd docs;
-          python -m sphinx -T -W -E -b html -d _build/doctrees -D language=en . _build/html
-
-      - name: Upload built HTML files
-        uses: actions/upload-artifact@v4
-        with:
-          name: hpy_html_docs
-          path: docs/_build/html/*
-          if-no-files-found: error
-          retention-days: 5
-
-  c_tests:
-    name: C tests
-    runs-on: 'ubuntu-latest'
-    steps:
-      - uses: actions/checkout@v4
-      - run: make -C c_test
-
-
-  check_autogen:
-    name: Check autogen
-    runs-on: 'ubuntu-latest'
-    steps:
-      - uses: actions/checkout@v4
-
-    # - template: azure-templates/python.yml
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          # autogen needs distutils
-          python-version: '3.11'
-
-      - name: Install/Upgrade Python dependencies
-        run: python -m pip install --upgrade pip wheel
-
-      - name: Install autogen dependencies
-        run: pip install -r requirements-autogen.txt
-
-      - name: make autogen
-        run: |
-          make autogen
-          if [ -z "$(git status --porcelain)" ]; then
-              # clean working copy
-              echo "Working copy is clean, everything ok"
-          else
-              # Uncommitted changes
-              echo "ERROR: uncommitted changes after running make autogen"
-              echo "git status"
-              git status
-              echo
-              echo "git diff"
-              git diff
-              exit 1
-          fi
-
-
-  check_py27_compat:
-    name: Check Python 2.7 compatibility
-    runs-on: 'ubuntu-20.04'
-    steps:
-      - uses: actions/checkout@v4
-
-    # - template: azure-templates/python.yml
-    #   parameters:
-    #     pythonVersion: "2.7"
-
-      - name: Set up Python2
-        # Copied from cython's ci.yml
-        run: |
-            sudo ln -fs python2 /usr/bin/python
-            sudo apt-get update
-            sudo apt-get install python-setuptools python2.7 python2.7-dev
-            curl https://bootstrap.pypa.io/pip/2.7/get-pip.py --output get-pip.py
-            sudo python2 get-pip.py
-            ls -l /usr/bin/pip* /usr/local/bin/pip*
-            which pip
-
-      - name: Install/Upgrade Python dependencies
-        run: python -m pip install --upgrade pip wheel
-
-      - name: check_py27_compat.py
-        run: |
-          python -m pip install pytest pytest-xdist filelock pathlib
-          python test/check_py27_compat.py
-
-
-  cpp_check:
-    name: Cppcheck static analysis
-    runs-on: 'ubuntu-22.04'
-    continue-on-error: true
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.10'
-
-      - name: Install Cppcheck
-        run: sudo apt-get -qq -y install cppcheck=2.7-1
-
-      - name: Run Cppcheck
-        run: make cppcheck
-
-
-  infer:
-    name: Infer static analysis
-    runs-on: 'ubuntu-latest'
-    steps:
-      - uses: actions/checkout@v4
-
-      # - template: azure-templates/python.yml
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.10'
-
-      - name: Install/Upgrade Python dependencies
-        run: python -m pip install --upgrade pip wheel
-
-      - name: Install Infer
-        run: |
-          python -m pip install compiledb wheel;
-          VERSION=1.1.0; \
-          curl -sSL "https://github.com/facebook/infer/releases/download/v$VERSION/infer-linux64-v$VERSION.tar.xz" \
-          | sudo tar -C /opt -xJ && \
-          echo "/opt/infer-linux64-v$VERSION/bin" >> $GITHUB_PATH
-
-      - name: Run Infer
-        run: make infer
-
-  check_microbench:
-    name: Check micro benchmarks
-    runs-on: 'ubuntu-latest'
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.x'
-
-      - name: Install / Upgrade system dependencies
-        run: sudo apt update && sudo apt install -y valgrind
-
-      - name: Install / Upgrade Python requirements
-        run: |
-          python -m pip install --upgrade pip wheel 'setuptools>=60.2'
-          python -m pip install pytest cffi
-
-      - name: Build and install HPy
-        run: |
-          make
-          python -m pip install .
-
-      - name: Run microbenchmarks
-        run: |
-          cd microbench
-          python setup.py build_ext -i
-          python -m pytest -v
diff --git a/.github/workflows/valgrind-tests.yml b/.github/workflows/valgrind-tests.yml.DISABLED
similarity index 100%
rename from .github/workflows/valgrind-tests.yml
rename to .github/workflows/valgrind-tests.yml.DISABLED