diff --git a/.github/workflows/tests_secondary.yml b/.github/workflows/tests_secondary.yml
index 75d4d0ebca..1fa3214680 100644
--- a/.github/workflows/tests_secondary.yml
+++ b/.github/workflows/tests_secondary.yml
@@ -204,7 +204,7 @@ jobs:
         PWTEST_TRACE: 1
         PWTEST_CHANNEL: ${{ matrix.channel }}
         PWTEST_BLOB_REPORT: 1
-        PWTEST_BLOB_SUFFIX: "-${{ matrix.channel }}"
+        PWTEST_BLOB_SUFFIX: ${{ (matrix.channel && format('-{0}', matrix.channel)) || '' }}
     - run: ./utils/upload_flakiness_dashboard.sh ./test-results/report.json
       if: always()
       shell: bash