Test lowest-direct dependencies

.github/workflows/nightly_dependency_tests.yaml

@@ -15,7 +15,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  nightly_tests:
+  check_latest_dependencies:
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -39,6 +39,41 @@ jobs:
           python -m pip install "pybamm[all] @ git+https://github.com/pybamm-team/PyBaMM@develop"
 
 
+      - name: Run ${{ matrix.suite }} tests
+        run: |
+          if [[ "${{ matrix.suite }}" == "unit" ]]; then
+              python -m pytest --unit
+          elif [[ "${{ matrix.suite }}" == "integration" ]]; then
+              python -m pytest --integration
+          elif [[ "${{ matrix.suite }}" == "examples" ]]; then
+              python -m pytest --examples
+          elif [[ "${{ matrix.suite }}" == "notebooks" ]]; then
+              python -m pytest --notebooks --nbmake --nbmake-timeout=1000 examples/
+          fi
+
+  check_lowest_dependencies:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-14]
+        python-version: ["3.10"]
+        suite: ["unit", "integration", "examples", "notebooks"]
+
+    name: Test-${{ matrix.os }}-py-${{ matrix.python-version }}-${{ matrix.suite }})
+
+    steps:
+      - uses: actions/checkout@v6
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: astral-sh/setup-uv@v7
+        with:
+          python-version: ${{ matrix.python-version }}
+          activate-environment: "true"
+      - name: Install dependencies
+        run: |
+          uv pip install --resolution lowest-direct -e .[all,dev]
+
+
       - name: Run ${{ matrix.suite }} tests
         run: |
           if [[ "${{ matrix.suite }}" == "unit" ]]; then

pyproject.toml

@@ -27,7 +27,7 @@ requires-python = ">=3.10, <3.13"
 dependencies = [
     "pybamm>=25.12.0",
     "numpy",
-    "scipy>=1.3",
+    "scipy>=1.12.0",
     "pints>=0.5.1",
     "SALib>=1.5",
 ]