diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 678aa25a..5d736f57 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -12,8 +12,6 @@ jobs:
           - python-version: '3.12-dev'
             numpy-version: '1.22'
       fail-fast: false
-    env:
-      COVERAGE_CORE: sysmon #
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2