diff --git a/cms/db/util.py b/cms/db/util.py
index 1365816e2f..3496b78604 100644
--- a/cms/db/util.py
+++ b/cms/db/util.py
@@ -325,6 +325,7 @@ def enumerate_files(
             queries.append(user_test_result_q.join(UserTestResult.executables)
                            .with_entities(UserTestExecutable.digest))
             queries.append(user_test_result_q
+                           .filter(UserTestResult.output != None)
                            .with_entities(UserTestResult.output))
 
     if not skip_print_jobs: