diff --git a/.github/workflows/test_development_versions.yml b/.github/workflows/test_development_versions.yml
new file mode 100644
index 0000000..303cc62
--- /dev/null
+++ b/.github/workflows/test_development_versions.yml
@@ -0,0 +1,59 @@
+name: Development version tests
+
+on:
+  push:
+    branches:
+      - main
+      - 'stable/**'
+  pull_request:
+    branches:
+      - main
+      - 'stable/**'
+  schedule:
+    - cron: '0 1 * * *'
+
+jobs:
+  tests:
+    name: development version tests (${{ matrix.os }}, ${{ matrix.python-version }})
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      max-parallel: 4
+      matrix:
+        os: [ubuntu-latest]
+        python-version: ["3.10", "3.14"]
+    steps:
+      - uses: actions/checkout@v7
+        with:
+          # The reference energies the tests check against come from data in the
+          # vendored upstream checkout, and setup.py needs its headers to compile.
+          submodules: recursive
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v7
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install MPI and BLAS (Linux)
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libopenmpi-dev openmpi-bin libopenblas-dev
+      - name: Install tools from pypi
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install tox build 'extremal-python-dependencies<2'
+      - name: Build qiskit-addon-sqd development wheel
+        run: |
+          git clone https://github.com/Qiskit/qiskit-addon-sqd
+          cd qiskit-addon-sqd
+          git rev-parse HEAD
+          python -m build --wheel
+      - name: Pin development versions
+        shell: bash
+        run: >-
+          extremal-python-dependencies pin-dependencies --inplace
+          "qiskit-addon-sqd @ file:$(echo qiskit-addon-sqd/dist/*.whl)"
+      - name: Test using tox environments
+        shell: bash
+        run: |
+          tox -e py,notebook,mpi