diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index c9563c8..efe6e1f 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -27,4 +27,4 @@ jobs:
       - run: npm test
         env:
           CI: true
-      - run: npm run coverage
+      - run: npm run coverage "--cov-send=--flags=${{ matrix.os }}"