diff --git a/.github/workflows/testing-all-oses.yml b/.github/workflows/testing-all-oses.yml
new file mode 100644
index 000000000..ef214edca
--- /dev/null
+++ b/.github/workflows/testing-all-oses.yml
@@ -0,0 +1,54 @@
+name: Test MSS
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  Test-MSS:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ["macos-12", "macos-14", "ubuntu-latest", "windows-latest"]
+        order: ["normal", "reverse"]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build requirements.txt file
+      run: |
+        cat localbuild/meta.yaml |
+          sed -n '/^requirements:/,/^test:/p' |
+          sed -e "s/.*- //" |
+          sed -e "s/menuinst.*//" |
+          sed -e "s/.*://" > requirements.tmp.txt
+        cat requirements.d/development.txt >> requirements.tmp.txt
+        sed -e '/^$/d' -e '/^#.*$/d' requirements.tmp.txt > requirements.txt
+        rm requirements.tmp.txt
+        cat requirements.txt
+    - name: Remove unavailable dependencies on Windows
+      if: ${{ startsWith(matrix.os, 'windows') }}
+      run: sed -i -e '/^dbus-python.*$/d' -e '/^libxmlsec1.*$/d' requirements.txt
+    - name: Get current year and calendar week
+      id: year-and-week
+      run: echo "year-and-week=$(date +%Y-%V)" >> "${GITHUB_OUTPUT}"
+    - uses: mamba-org/setup-micromamba@v1
+      with:
+        environment-file: requirements.txt
+        environment-name: ci
+        cache-environment: true
+        # Set the cache key in a way that the cache is invalidated every week on monday
+        cache-environment-key: environment-${{ steps.year-and-week.outputs.year-and-week }}
+    - name: Run tests
+      timeout-minutes: 20
+      run: micromamba run -n ci ${{ (startsWith(matrix.os, 'ubuntu') && 'xvfb-run') || 'env QT_QPA_PLATFORM=offscreen' }}
+        pytest -v -n 6 --dist loadfile --max-worker-restart 4 --durations=20 --cov=mslib
+        ${{ (matrix.order == 'normal' && ' ') || (matrix.order == 'reverse' && '--reverse') }} tests
+    - name: Collect coverage
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: |
+        git config --global --add safe.directory /__w/MSS/MSS
+        micromamba create -n coveralls coveralls
+        micromamba run -n coveralls coveralls --service=github