diff --git a/.github/workflows/system-tests.yml b/.github/workflows/system-tests.yml
index 07bd48e..e68dd67 100644
--- a/.github/workflows/system-tests.yml
+++ b/.github/workflows/system-tests.yml
@@ -43,16 +43,16 @@ jobs:
   main:
     needs:
       - build-artifacts
-    uses: DataDog/system-tests/.github/workflows/system-tests.yml@main
+    uses: DataDog/system-tests/.github/workflows/system-tests.yml@1e5d6b7096279ca43ce4826fda3cc805635b63c1
     secrets:
       TEST_OPTIMIZATION_API_KEY: ${{ secrets.DD_API_KEY_CI_APP }}
       DD_API_KEY: ${{ secrets.DD_API_KEY_CI_APP }}
     permissions:
       contents: read
       id-token: write
-      packages: write
     with:
       library: cpp_httpd
+      ref: 1e5d6b7096279ca43ce4826fda3cc805635b63c1
       binaries_artifact: system_tests_binaries
       desired_execution_time: 300  # 5 minutes
       scenarios_groups: tracer-release