diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ef022f4d8..409c556cf 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,162 +1,13 @@
 name: Tests
 
-on: [push]
+on: [push, pull_request]
 
+# Unit tests are defined once, centrally, in PyAutoPulse's reusable workflow
+# (Pulse owns all health/readiness checking). This thin caller preserves PR-time
+# gating: the `unittest` job is the required status check on this repo.
 jobs:
   unittest:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ['3.12', '3.13']
-    steps:
-    - name: Checkout PyAutoConf
-      uses: actions/checkout@v2
-      with:
-        repository: PyAutoLabs/PyAutoConf
-        path: PyAutoConf
-    - name: Checkout PyAutoFit
-      uses: actions/checkout@v2
-      with:
-        path: PyAutoFit
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
-      with:
-        python-version: ${{ matrix.python-version }}
-    - uses: actions/cache@v3
-      id: cache-pip
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-pip-
-    - name: Extract branch name
-      shell: bash
-      run: |
-        cd PyAutoFit
-        echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
-      id: extract_branch
-    - name: Change to same branch if exists in deps
-      shell: bash
-      run: |
-        export PACKAGES=("PyAutoConf")
-        export BRANCH="${{ steps.extract_branch.outputs.branch }}"
-        for PACKAGE in ${PACKAGES[@]}; do
-          pushd $PACKAGE
-          export existed_in_remote=$(git ls-remote --heads origin ${BRANCH})
-          if [[ -z ${existed_in_remote} ]]; then
-            echo "Branch $BRANCH did not exist in $PACKAGE"
-          else
-            echo "Branch $BRANCH did exist in $PACKAGE"
-            git fetch
-            git checkout $BRANCH
-          fi
-          popd
-        done
-    - name: Install dependencies
- #     if: steps.cache-pip.outputs.cache-hit != 'true'
-      run: |
-        pip3 install --upgrade pip
-        pip3 install setuptools
-        pip3 install wheel
-        pip3 install pytest coverage pytest-cov
-        pip install ./PyAutoConf "./PyAutoFit[optional]"
-    - name: Run tests
-      run: |
-        export ROOT_DIR=`pwd`
-        export PYTHONPATH=$PYTHONPATH:$ROOT_DIR/PyAutoConf
-        export PYTHONPATH=$PYTHONPATH:$ROOT_DIR/PyAutoFit
-        pushd PyAutoFit
-        # The NSS test suite (test_autofit/non_linear/search/nest/nss/) runs in
-        # the parallel `unittest_nss` job below — it needs the handley-lab
-        # blackjax fork from the [nss] extra, which conflicts with the
-        # blackjax>=1.2.0 mainline pinned in [optional].
-        if [ "${{ matrix.python-version }}" = "3.13" ]; then
-          pytest --cov autofit --cov-report xml:coverage.xml \
-            --ignore=test_autofit/non_linear/search/nest/nss \
-            --ignore=test_autofit/database/test_file_types.py \
-            --ignore=test_autofit/non_linear/paths/test_save_and_load.py \
-            --ignore=test_autofit/aggregator/summary_files/test_aggregate_fits.py \
-            --ignore=test_autofit/aggregator/test_child_analysis.py \
-            --ignore=test_autofit/aggregator/test_reference.py \
-            --ignore=test_autofit/aggregator/test_scrape.py \
-            --ignore=test_autofit/graphical/gaussian/test_optimizer.py \
-            --ignore=test_autofit/graphical/hierarchical/test_optimise.py \
-            --ignore=test_autofit/non_linear/search/test_sneaky_map.py \
-            --deselect "test_autofit/graphical/test_composition.py::test_other_priors[LogUniformPrior]" \
-            --deselect "test_autofit/mapper/prior/test_prior.py::TestLogUniformPrior::test__non_zero_lower_limit"
-        else
-          pytest --cov autofit --cov-report xml:coverage.xml \
-            --ignore=test_autofit/non_linear/search/nest/nss
-        fi
-    - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
-    - name: Slack send
-      if: ${{ failure() }}
-      id: slack
-      uses: slackapi/slack-github-action@v1.21.0
-      env:
-        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
-      with:
-        channel-id: C03S98FEDK2
-        payload: |
-                {
-                  "text": "${{ github.repository }}/${{ github.ref_name }} (Python ${{ matrix.python-version }}) build result: ${{ job.status }}\n${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
-                }
-
-  unittest_nss:
-    # NSS tests live in their own job because the [nss] extra pins the
-    # handley-lab/blackjax fork (BSD-3-Clause, ~0.1.0b1.dev85+gef45acd2f),
-    # which is mutually incompatible with the mainline `blackjax>=1.2.0`
-    # that the `[optional]` extra (and `test_blackjax_nuts.py`) requires.
-    # Two envs in parallel keep both test families green without forcing a
-    # choice between them.
-    name: NSS tests (fork blackjax)
-    runs-on: ubuntu-latest
-    timeout-minutes: 20
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ['3.12', '3.13']
-    steps:
-    - name: Checkout PyAutoConf
-      uses: actions/checkout@v4
-      with:
-        repository: PyAutoLabs/PyAutoConf
-        path: PyAutoConf
-    - name: Checkout PyAutoFit
-      uses: actions/checkout@v4
-      with:
-        path: PyAutoFit
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        pip install --upgrade pip
-        pip install pytest pytest-cov
-        pip install ./PyAutoConf "./PyAutoFit[nss]"
-        # blackjax (handley-lab fork) and yallup/nss can't live in the [nss]
-        # extra — PyPI bans direct git+ URLs in uploaded wheel metadata.
-        # Install them post-extras instead. SHAs are the single source of
-        # truth in PyAutoFit/pyproject.toml's [nss] comment — keep in sync.
-        pip install \
-          "blackjax @ git+https://github.com/handley-lab/blackjax.git@ef45acd2f2fa0cca15adbdcd3ff7cb3a98987cb5" \
-          "nss @ git+https://github.com/yallup/nss.git@69159b0f4a3a53123b9eec7df91e4ed3885e4dc4"
-    - name: Run NSS tests
-      run: |
-        export PYTHONPATH=$PWD/PyAutoConf:$PWD/PyAutoFit
-        pushd PyAutoFit
-        pytest test_autofit/non_linear/search/nest/nss
-    - name: Slack send
-      if: ${{ failure() }}
-      uses: slackapi/slack-github-action@v1.21.0
-      env:
-        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
-      with:
-        channel-id: C03S98FEDK2
-        payload: |
-                {
-                  "text": "${{ github.repository }}/${{ github.ref_name }} NSS tests (Python ${{ matrix.python-version }}) result: ${{ job.status }}\n${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
-                }
\ No newline at end of file
+    uses: PyAutoLabs/PyAutoPulse/.github/workflows/lib-tests.yml@main
+    with:
+      package: autofit
+    secrets: inherit