diff --git a/.github/workflows/test_regression.yml b/.github/workflows/test_regression.yml
index c827925..24c06be 100644
--- a/.github/workflows/test_regression.yml
+++ b/.github/workflows/test_regression.yml
@@ -16,3 +16,12 @@ jobs:
         shell: bash
         run: |
           tests/test_regression.sh
+
+      - name: Archive generated headers
+        uses: actions/upload-artifact@v3
+        with:
+          name: dsdl_generated
+          path: |
+           dsdl_generated/include
+           dsdl_generated/src
+          retention-days: 90
diff --git a/tests/test_regression.sh b/tests/test_regression.sh
index 2087fca..26ae625 100755
--- a/tests/test_regression.sh
+++ b/tests/test_regression.sh
@@ -7,10 +7,10 @@ set -x
 # test compiler on linux
 python3 -m pip install -U empy pexpect dronecan
 
-cd ..
-
-git clone https://github.com/DroneCAN/dronecan_dsdlc
-git clone https://github.com/DroneCAN/libcanard
+pushd ..
+[ -d dronecan_dsdlc ] || git clone https://github.com/DroneCAN/dronecan_dsdlc
+[ -d libcanard ] || git clone https://github.com/DroneCAN/libcanard
+popd
 
 echo "Testing generation with regression testing"
-python3 dronecan_dsdlc/dronecan_dsdlc.py --output dsdl_generated DSDL/dronecan DSDL/uavcan DSDL/com DSDL/ardupilot --run-test
+python3 ../dronecan_dsdlc/dronecan_dsdlc.py --output dsdl_generated dronecan uavcan com ardupilot --run-test