diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 56f5f442e0..7b9afbf09a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -57,7 +57,9 @@ jobs:
       with:
         node-version: 10.15
     - run: npm install
-    - run: set DEBUG=* & npm run ctest
+    - run: npm run ctest
+      env:
+        DEBUG: *
     - uses: actions/upload-artifact@v1
       with:
         name: chromium-win-testrun.log