diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0486b47b..58003156 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -22,6 +22,7 @@ jobs:
         run: |
           arduino-cli core update-index
           arduino-cli core install arduino:avr
+          export BOARD="arduino:avr:uno"
           export WARNINGS=all
       
       - uses: actions/checkout@v2