diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f894fa11197..861804c7ab8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,6 +15,7 @@ env:
   MPLBACKEND: Agg
   PYTEST_ADDOPTS: --color=yes
   GITHUB_PR_NUMBER: ${{ github.event.number }}
+  COVERAGE_CORE: sysmon
 
 jobs:
   lint: