diff --git a/.github/workflows/test_real_hardware.yml b/.github/workflows/test_real_hardware.yml
index 0385c7b1..1650ac3b 100644
--- a/.github/workflows/test_real_hardware.yml
+++ b/.github/workflows/test_real_hardware.yml
@@ -40,7 +40,7 @@ jobs:
 
     - name: get core version and copy package from repo to arduino-cli location
       run: |
-        CH55XDUINO_VER=$(arduino-cli core list | grep 'CH55xDuino:mcs51' | awk '{print $2}')
+        CH55XDUINO_VER=$(arduino-cli core --config-dir "$RUNNER_TEMP/arduino_config" list | grep 'CH55xDuino:mcs51' | awk '{print $2}')
         echo "CH55xDuino:mcs51 version: $CH55XDUINO_VER"
         ls -l $RUNNER_TEMP/arduino_config/packages/CH55xDuino/hardware/mcs51/
     #     cp -rf $GITHUB_WORKSPACE/ch55xduino/ch55x/* $HOME/.arduino15/packages/CH55xDuino/hardware/mcs51/$CH55XDUINO_VER/