diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index b61d9a5de..de46f434d 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -134,13 +134,10 @@ jobs:
       env:
         UV_LINK_MODE: ${{ runner.os == 'Windows' && 'symlink' || 'hardlink' }}
 
-    - name: Set COVERAGE_CORE
-      if: contains(fromJson('["3.12", "3.13"]'), matrix.pyv)
-      run: echo "COVERAGE_CORE=sysmon" >> "$GITHUB_ENV"
-
     - name: run tests
       timeout-minutes: 40
       env:
+        COVERAGE_CORE: sysmon
         PYTHONUTF8: 1
       run: >
         pytest ${{ matrix.pytestargs }} -n=logical --dist=worksteal --timeout=300 --durations=0