diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 13d8a3d..7fff273 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -27,6 +27,8 @@ jobs:
       run: cargo build --verbose
     - name: Run tests
       run: cargo test --verbose
+      env:
+        RUSTFLAGS: "-C instrument-coverage" 
     - name: Codecov
       uses: codecov/codecov-action@v3.1.4