diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 6911bf0..24c440a 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -7,6 +7,11 @@ on:
   # Enable Run Workflow button in GitHub UI
   workflow_dispatch:
 
+  push:
+    branches: [ main ]
+
+  pull_request:
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
@@ -34,55 +39,47 @@ jobs:
   build_wheels:
     name: Wheels - ${{ matrix.cibw_archs }} - ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
+    env:
+      # graphblas version to use if another one is not provided
+      default-graphblas-version: "8.2.0"
+
     strategy:
       fail-fast: false
       matrix:
-        # Loosely based on scikit-learn's config:
-        # https://github.com/scikit-learn/scikit-learn/blob/main/.github/workflows/wheels.yml
         include:
           - os: windows-latest
-            python-version: "3.8"
-            platform_id: win_amd64
-            cibw_archs: "auto"
+            cibw_archs: "auto64"
 
-          # Linux 64 bit manylinux2014
+          # Linux x86
           - os: ubuntu-latest
-            python-version: "3.8"
-            platform_id: manylinux_x86_64
-            manylinux_image: manylinux2014
-            cibw_archs: "native"
+            cibw_archs: "x86_64"
+            # skip musllinux
+            cibw_skip: "*musl*"
 
-          # Linux 64 bit manylinux2014 for aarch64
+          # Linux aarch64
           # Separate runner because this requires emulation (only x86 runners are available) and is very slow.
           - os: ubuntu-latest
-            python-version: "3.8"
-            platform_id: manylinux_x86_64
-            manylinux_image: manylinux2014
             cibw_archs: "aarch64"
+            # numpy wheels not available for aarch64 PyPy or musllinux
+            cibw_skip: "pp* *musl*"
 
           # macOS x86
           - os: macos-latest
-            python-version: "3.8"
-            platform_id: macosx_x86_64
             cibw_archs: "x86_64"
 
-          # Use x86 macOS runner to build ARM.
+          # macOS Apple Silicon cross-compiled on x86 macOS runner.
           # GitHub does not offer Apple Silicon yet (only for self-hosted).
           # See https://github.com/github/roadmap/issues/528
           - os: macos-latest
-            python-version: "3.8"
-            platform_id: macosx_x86_64
             cibw_archs: "arm64"
+            # Skip macOS ARM tests on Intel runner.
+            cibw_test_skip: "*-macosx_arm64"
 
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-python@v4
-        with:
-          python-version: ${{ matrix.python-version }}
-
       # aarch64 Linux builds are cross-compiled on x86 runners using emulation
       # see https://cibuildwheel.readthedocs.io/en/stable/faq/#emulation
       - name: Setup QEMU (for aarch64)
@@ -98,6 +95,20 @@ jobs:
         run: |
           echo "SUITESPARSE_FAST_BUILD=1" >> $GITHUB_ENV
 
+      - name: Setup for testing
+        if: github.event_name == 'push' || github.event_name == 'pull_request'
+        # Ask suitesparse.sh to compile in the fastest way possible and provide a GB version to build
+        run: |
+          echo "SUITESPARSE_FASTEST_BUILD=1" >> $GITHUB_ENV
+          echo "GB_VERSION_REF=refs/tags/${{ env.default-graphblas-version }}.0" >> $GITHUB_ENV
+        shell: bash
+
+      - name: Setup GraphBLAS version from git tag
+        if: ${{ startsWith(github.ref, 'refs/tags/') }}
+        # If this is a tagged ref, like a release, then use the tag for the graphblas version
+        run: echo "GB_VERSION_REF=${{ github.ref }}" >> $GITHUB_ENV
+        shell: bash
+
       - name: Install tools (macOS)
         if: contains(matrix.os, 'macos')
         # Install coreutils which includes `nproc` used by `make -j` in suitesparse.sh
@@ -112,18 +123,20 @@ jobs:
             sh add_arm_to_libomp_dylib.sh
           fi
 
-      - name: Build Wheels
+      - uses: pypa/cibuildwheel@v2.16
+        with:
+          output-dir: wheelhouse
         env:
           # very verbose
           CIBW_BUILD_VERBOSITY: 3
 
           # Build SuiteSparse
-          CIBW_BEFORE_ALL: bash suitesparse.sh ${{ github.ref }}
+          CIBW_BEFORE_ALL: bash suitesparse.sh ${{ env.GB_VERSION_REF }}
 
           # Install FFI dev library, needed for Python 3.12
           CIBW_BEFORE_BUILD_LINUX: yum install -y libffi-devel
 
-          CIBW_ENVIRONMENT_LINUX: SUITESPARSE_FAST_BUILD=${{ env.SUITESPARSE_FAST_BUILD }}
+          CIBW_ENVIRONMENT_PASS_LINUX: SUITESPARSE_FAST_BUILD SUITESPARSE_FASTEST_BUILD
 
           # CMAKE_GNUtoMS=ON asks suitesparse.sh to build libraries in MSVC style on Windows.
           CIBW_ENVIRONMENT_WINDOWS: CMAKE_GNUtoMS=ON GRAPHBLAS_PREFIX="C:/GraphBLAS"
@@ -138,11 +151,8 @@ jobs:
           # Architectures to build specified in matrix
           CIBW_ARCHS: ${{ matrix.cibw_archs }}
 
-          # No 32-bit builds
-          # no musllinux
-          # no PyPy aarch64 (only due to build speed, numpy does not ship aarch64 pypy wheels)
           # as of writing numpy does not support pypy 3.10
-          CIBW_SKIP: "*-win32 *_i686 *musl* pp*aarch64 pp310*"
+          CIBW_SKIP: "${{ matrix.cibw_skip }} pp310*"
 
           # Use delvewheel on Windows.
           # This copies graphblas.dll into the wheel. "repair" in cibuildwheel parlance includes copying any shared
@@ -159,14 +169,7 @@ jobs:
           # run tests
           CIBW_TEST_COMMAND: "pytest --pyargs suitesparse_graphblas -s -k test_print_jit_config && pytest -v --pyargs suitesparse_graphblas"
 
-          # GitHub Actions macOS Intel runner cannot run ARM tests. Uncomment to silence warning.
-          CIBW_TEST_SKIP: "*-macosx_arm64"
-
-        run: |
-          python -m pip install --upgrade pip
-          python -m pip install cibuildwheel
-          python -m cibuildwheel --output-dir wheelhouse .
-        shell: bash
+          CIBW_TEST_SKIP: ${{ matrix.cibw_test_skip }}
 
       - uses: actions/upload-artifact@v3
         id: uploadAttempt1
@@ -189,8 +192,8 @@ jobs:
     name: Upload to PyPI
     needs: [build_wheels, build_sdist]
     runs-on: ubuntu-latest
-    if: github.repository == 'GraphBLAS/python-suitesparse-graphblas'
-    # if: github.event_name == 'release' && github.event.action == 'published'
+    # only upload releases to PyPI
+    if: github.repository == 'GraphBLAS/python-suitesparse-graphblas' && github.event_name == 'release' && github.event.action == 'published'
 
     steps:
       - uses: actions/setup-python@v4
@@ -212,4 +215,4 @@ jobs:
 
           # Test PyPI:
           # password: ${{ secrets.TEST_PYPI_API_TOKEN }}
-          # repository_url: https://test.pypi.org/legacy/
+          # repository-url: https://test.pypi.org/legacy/
diff --git a/suitesparse.sh b/suitesparse.sh
index 56c6784..1376bb3 100755
--- a/suitesparse.sh
+++ b/suitesparse.sh
@@ -87,8 +87,27 @@ if [ -n "${SUITESPARSE_FAST_BUILD}" ]; then
     echo "#define GxB_NO_UINT8     1" >> ../Source/GB_control.h
 fi
 
-# Disable all Source/Generated2 kernels. For workflow development only.
-#cmake_params+=(-DCMAKE_CUDA_DEV=1)
+if [ -n "${SUITESPARSE_FASTEST_BUILD}" ]; then
+    echo "suitesparse.sh: Fastest build requested."
+    # Fastest build possible. For use in development and automated tests that do not depend on performance.
+
+    echo "#define GxB_NO_BOOL      1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_FP32      1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_FP64      1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_FC32      1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_FC64      1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_INT16     1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_INT32     1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_INT64     1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_INT8      1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_UINT16    1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_UINT32    1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_UINT64    1" >> ../Source/GB_control.h
+    echo "#define GxB_NO_UINT8     1" >> ../Source/GB_control.h
+
+    # Disable all Source/Generated2 kernels. For workflow development only.
+    cmake_params+=(-DCMAKE_CUDA_DEV=1)
+fi
 
 # Use `-DJITINIT=2` so that the JIT functionality is available, but disabled by default.
 # Level 2, "run", means that pre-JIT kernels may be used, which does not require a compiler at runtime.