diff --git a/scripts/test_long_task_governor_wrapper.mjs b/scripts/test_long_task_governor_wrapper.mjs
index d38bcd1..f703b89 100644
--- a/scripts/test_long_task_governor_wrapper.mjs
+++ b/scripts/test_long_task_governor_wrapper.mjs
@@ -62,6 +62,13 @@ const fixtures = [
     file: path.join(repoRoot, 'docs', '_artifacts', 'long_task_governor_wrapper_subagent_wait_example.json'),
     assert(output) {
       assert.equal(output.silentCandidate, true);
+      assert.ok(output.progressEvidence && typeof output.progressEvidence === 'object', 'subagent wait: missing progressEvidence');
+      assert.equal(typeof output.progressEvidence.sessionKey, 'string', 'subagent wait: missing progressEvidence.sessionKey');
+      assert.ok(output.progressEvidence.sessionKey.length > 0, 'subagent wait: empty progressEvidence.sessionKey');
+      assert.equal(typeof output.externalizedCheckpointPath, 'string', 'subagent wait: missing externalizedCheckpointPath');
+      assert.ok(output.externalizedCheckpointPath.length > 0, 'subagent wait: empty externalizedCheckpointPath');
+      assert.equal('task_name' in (output.progressEvidence ?? {}), false, 'subagent wait: progressEvidence must not backfill taskRecord.task_name');
+      assert.equal(JSON.stringify(output.progressEvidence).includes('Wait for delegated log survey'), false, 'subagent wait: progressEvidence must not derive from taskRecord.task_name');
     },
   },
 ];