diff --git a/.github/workflows/make_test_data.yml b/.github/workflows/make_test_data.yml
new file mode 100644
index 0000000..5736200
--- /dev/null
+++ b/.github/workflows/make_test_data.yml
@@ -0,0 +1,52 @@
+name: Make test data
+
+on:
+  push:
+    branches:
+      - main
+
+  pull_request:
+    branches:
+      - main
+
+  schedule:
+    - # Run every day at 2:00 UTC
+    - cron: "0 2 * * *"
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install git+https://github.com/AstarVienna/ScopeSim_Data.git
+          pip install git+https://github.com/AstarVienna/ScopeSim.git
+          pip install astar-utils numpy more-itertools astropy PyYAML scopesim_templates
+      - name: Run recipes
+        run: |
+          git clone https://github.com/AstarVienna/METIS_Simulations.git
+          python METIS_Simulations/ESO/downloadPackages.py
+          python METIS_Simulations/ESO/run_recipes.py --small --doCalib=1 --sequence=1 --doStatic --small --outputDir metis_sim_small_1/data
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v5
+        with:
+          commit-message: "Update test data"
+          branch: update-test-data
+          delete-branch: true
+          title: "[Assist PR] Update test data"
+          body: |
+            Update test data.
+            Auto-generated.
+          labels: |
+            automated
+          draft: false