diff --git a/.github/workflows/mercury.yml b/.github/workflows/mercury.yml
index 00646bc61f..468c8fb666 100644
--- a/.github/workflows/mercury.yml
+++ b/.github/workflows/mercury.yml
@@ -46,7 +46,7 @@ jobs:
 
       - name: Run Scala formatter
         run: |
-          echo ${{ env.GITHUB_WORKSPACE }}
+          echo "defaults = ${{ defaults.run.working-directory }}"
           sbt scalafmtCheckAll
 
       - name: Build and test Mercury
@@ -56,13 +56,13 @@ jobs:
         if: always()
         uses: ./.github/actions/aggregate-test-reports
         with:
-          tests-dir: "${{ env.GITHUB_WORKSPACE }}"
+          tests-dir: "${{ defaults.run.working-directory }}"
 
       - name: Publish test results
         # Publish even if the test step fails
         if: always()
         uses: EnricoMi/publish-unit-test-result-action@v2
         with:
-          junit_files: "${{ env.GITHUB_WORKSPACE }}/target/test-reports/**/TEST-*.xml"
+          junit_files: "${{ defaults.run.working-directory }}/target/test-reports/**/TEST-*.xml"
           comment_title: "Mercury Test Results"
           check_name: "Mercury Test Results"