diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c4665c4af..2841bd895 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -321,7 +321,10 @@ jobs:
       - name: Build
         run: cmake --build build --config ${{env.BUILD_TYPE}}
       - name: "Dryrun test (not installed)"
-        run: Write-Host "`n`n" -NoNewline | bash tools/test-avrdude -v -e build/src/${{env.BUILD_TYPE}}/avrdude.exe -c "-C build/src/avrdude.conf" -d0 -p"-cdryrun -pm2560" -p"-cdryrun -pavr64du28"
+        run: |
+          $tmp = [System.IO:Path]::GetTempPath()
+          $tmp_slash = $tmp -replace '\\', '/'
+          Write-Host "`n`n" -NoNewline | bash tools/test-avrdude -v -t "$tmp_slash" -e build/src/${{env.BUILD_TYPE}}/avrdude.exe -c "-C build/src/avrdude.conf" -d0 -p"-cdryrun -pm2560" -p"-cdryrun -pavr64du28"
       - name: Archive build artifacts
         if: always()
         uses: actions/upload-artifact@v3