diff --git a/.github/workflows/pr-checks.yaml b/.github/workflows/pr-checks.yaml
index 6250cea..8a7c92b 100644
--- a/.github/workflows/pr-checks.yaml
+++ b/.github/workflows/pr-checks.yaml
@@ -55,7 +55,7 @@ jobs:
           coverage xml -i
 
       - name: "Upload coverage to Codecov"
-        if: ${{ secrets.CODECOV_TOKEN != '' }}
+        if: ${{ github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository) }}
         uses: codecov/codecov-action@v1
         with:
           token: ${{ secrets.CODECOV_TOKEN }}