diff --git a/.github/workflows/portability.yml b/.github/workflows/portability.yml
new file mode 100644
index 0000000..aa56dd3
--- /dev/null
+++ b/.github/workflows/portability.yml
@@ -0,0 +1,77 @@
+name: Testing portability (OS and python version)
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ["ubuntu-20.04", "ubuntu-latest", "macos-latest"]
+        python-version: ["3.10", "pypy2.7", "pypy3.9", "graalpy-22.3"]
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Compute python major version
+      id: pyver
+      run: |
+        python -c 'import sys;print("pyver=%s"%sys.version_info[0])' >> "$GITHUB_OUTPUT"
+    - name: pypy2.7 does not have lzma by default
+      if: ${{ matrix.python-version == 'pypy2.7' }}
+      run: |
+        if test Darwin = `uname -s`
+        then brew install xz
+        else sudo apt-get install xz-utils
+        fi
+        unxz cpu_rec_corpus/*.xz
+    - name: Analyze /bin/sh
+      run: |
+        python ./cpu_rec.py /bin/sh
+    - name: Analyze /bin/sh with LRGH's elfesteem
+      run: |
+        git clone https://github.com/LRGH/elfesteem
+        export PYTHONPATH=./elfesteem
+        python ./cpu_rec.py /bin/sh
+        rm -rf elfesteem
+    - name: Analyze /bin/sh with airbus-seclab's elfesteem
+      if: ${{ steps.pyver.outputs.pyver == 2 }}
+      run: |
+        git clone https://github.com/airbus-seclab/elfesteem
+        export PYTHONPATH=./elfesteem
+        python ./cpu_rec.py /bin/sh
+        rm -rf elfesteem
+
+  python24:
+    runs-on: "ubuntu-latest"
+    strategy:
+      fail-fast: false
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python 2.4
+      run: |
+        cd ..
+        curl -O https://www.python.org/ftp/python/2.4.6/Python-2.4.6.tgz
+        tar xzf Python-2.4.6.tgz
+        cd Python-2.4.6
+        ./configure
+        make
+        export PATH=$(pwd):$PATH
+        cd ../cpu_rec
+        python -c 'import sys;print(sys.version)'
+    - name: Analyze /bin/sh
+      run: |
+        python ./cpu_rec.py /bin/sh
+    - name: Analyze /bin/sh with LRGH's elfesteem
+      run: |
+        git clone https://github.com/LRGH/elfesteem
+        export PYTHONPATH=./elfesteem
+        python ./cpu_rec.py /bin/sh
+        rm -rf elfesteem
diff --git a/README.md b/README.md
index 8259c6b..edd8917 100644
--- a/README.md
+++ b/README.md
@@ -291,4 +291,5 @@ and was distributed for the Atredis BlackHat 2018 challenge, under an unknown li
 
 ## Development status
 
+[![Portability](https://github.com/airbus-seclab/cpu_rec/actions/workflows/portability.yml/badge.svg)](https://github.com/airbus-seclab/cpu_rec/actions/workflows/portability.yml)
 [![Code Quality](https://img.shields.io/lgtm/grade/python/g/airbus-seclab/cpu_rec.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/airbus-seclab/cpu_rec/context:python)