diff --git a/.github/workflows/ci_tests_run_notebooks.yml b/.github/workflows/ci.yml
similarity index 51%
rename from .github/workflows/ci_tests_run_notebooks.yml
rename to .github/workflows/ci.yml
index 523c9df..8587102 100644
--- a/.github/workflows/ci_tests_run_notebooks.yml
+++ b/.github/workflows/ci.yml
@@ -1,4 +1,4 @@
-name: Test notebooks
+name: Test
 
 on:
   push:
@@ -16,31 +16,33 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  tests:
-    name: ${{ matrix.os }} ${{ matrix.name }}
+  tox_test:
+    name: tox on ${{ matrix.os }} with ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        # Run all supported OS for one Python version, then add a few extra scenarios
+        # Run all supported OS for one Python version.
+        # The test additional Python versions on Linux only.
         os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ['3.12']
         toxenv: [py312-test]
-        name: ['with Python 3.12',]
+        name: ['Python 3.12',]
 
         include:
-          - python-version: '3.10'
-            toxenv: py310-test-oldestdeps
-            name: with Python 3.10 and oldest versioned dependencies
+          - python-version: '3.11'
+            toxenv: py311-test-oldestdeps
+            name: Python 3.11 and oldest versioned dependencies
             os: ubuntu-latest
 
           - python-version: '3.13'
             toxenv: py313-test-devdeps
-            name: with Python 3.13 and developer versioned dependencies
+            name: Python 3.13 and developer versioned dependencies
             os: ubuntu-latest
 
     steps:
     - uses: actions/checkout@v4
+
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
@@ -52,9 +54,8 @@ jobs:
     - name: Test with tox
       run: tox ${{ matrix.toxargs }} -e ${{ matrix.toxenv }} -- ${{ matrix.toxposargs }}
 
-
-  gha_buildhtml:
-    name: Buildhtml testing
+  tox_build:
+    name: Build static site with tox
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -62,10 +63,40 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.11'
+          python-version: '3.12'
 
       - name: Install dependencies
         run: python -m pip install --upgrade tox
 
-      - name: Execute notebooks as testing
-        run: tox -e py311-buildhtml
+      - name: Build static site
+        run: tox -e py312-buildhtml
+
+  pixi_test:
+    name: pixi on ${{ matrix.os }} with ${{ matrix.environment}}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        # Run all supported OS for one Python version, then add a few extra scenarios
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        environment: [py311, py312]
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Setup pixi
+      uses: prefix-dev/setup-pixi@v0.8.1
+
+    - name: Test all files
+      run: pixi run test
+
+  pixi_build:
+    name: Build static site with pixi
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Setup pixi
+      uses: prefix-dev/setup-pixi@v0.8.1
+
+    - name: Build static site
+      run: pixi run build
diff --git a/Makefile b/Makefile
index d4bb2cb..5b2e2f9 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 
 # You can set these variables from the command line, and also
 # from the environment for the first two.
-SPHINXOPTS    ?=
+SPHINXOPTS    ?= -n -W -T --keep-going
 SPHINXBUILD   ?= sphinx-build
 SOURCEDIR     = .
 BUILDDIR      = _build
diff --git a/pixi.toml b/pixi.toml
index 2a2bde1..c83a7bb 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -23,6 +23,7 @@ build = { cmd = [
 ] }
 clean = "rm -rf _build/*"
 start = "jupyter lab"
+test = "bash ./test.sh"
 
 [activation]
 scripts = ["setup_jupyterlab_config.sh"]
@@ -33,6 +34,8 @@ matplotlib-base = ">=3.9"
 ipympl = ">=0.9"
 jupyterlab = ">=4.2"
 jupyterlab-myst = ">=2.4"
+pytest = ">=8.3.5,<9"
+nbval = ">=0.11.0,<0.12"
 
 [pypi-dependencies]
 sphinx = ">=8.0.2"
@@ -41,6 +44,12 @@ jupytext = ">=1.16"
 sphinx-book-theme = ">=1.1"
 sphinx-copybutton = ">=0.5"
 
+[feature.py312.dependencies]
+python = "3.12.*"
+
+[feature.py313.dependencies]
+python = "3.13.*"
+
 [feature.jupyterlite.dependencies]
 jupyterlab = "~=4.2.4"
 jupyterlite-core = "==0.4.0"
@@ -48,4 +57,6 @@ jupyterlite-pyodide-kernel = "==0.4.1"
 notebook = "~=7.2.1"
 
 [environments]
+py312 = ["py312"]
+py313 = ["py313"]
 jupyterlite = ["jupyterlite"]
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..041ccff
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,2 @@
+[pytest]
+norecursedirs = _build
diff --git a/test.sh b/test.sh
new file mode 100755
index 0000000..5ec7964
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# Collect converted ipynb files to clean up at the end.
+notebook_files=()
+
+# Find Markdown files convert.
+all_markdown_files=$(find tutorials -type f -name "*.md")
+if [ $# -gt 0 ]; then
+    files_to_process="$@"
+else
+    files_to_process=$all_markdown_files
+fi
+
+# Identify Markdown files that are Jupytext and convert them all.
+for file in ${files_to_process}; do
+    echo loop in $file
+    # Extract the kernel information from the Jupytext Markdown file.
+    kernel_info=$(grep -A 10 '^---$' "$file" | grep -E 'kernelspec')
+    # Skip if no kernel information was found.
+    if [ -z "$kernel_info" ]; then
+        continue
+    fi
+    # Convert to ipynb format, to be consumed by pytest nbval plugin.
+    jupytext --to ipynb "$file"
+    notebook_file="${file%.md}.ipynb"
+    # Stash file in array to be cleaned up at the end.
+    notebook_files+=("${notebook_file}")
+done
+
+pytest --nbval-lax
+
+# Clean up ipynb files that were converted.  Any stray ipynb files that were
+# _not_ the result of conversion from Markdown will be left alone.
+for file in "${notebook_files[@]}"; do
+    rm -v "$file"
+done