diff --git a/tests/test_rag_phase4_stress.py b/tests/test_rag_phase4_stress.py
index c12d5d4..b287fee 100644
--- a/tests/test_rag_phase4_stress.py
+++ b/tests/test_rag_phase4_stress.py
@@ -70,7 +70,17 @@ def test_rag_large_codebase_verification_sim(live_gui):
   (workspace_dir / "file_25.txt").write_text("MODIFIED CONTENT FOR FILE 25. SEARCH FOR THIS.")
   
   client.click('btn_rebuild_rag_index')
-  time.sleep(2) # Wait for it to finish
+  
+  # Wait for 'ready'
+  success = False
+  for _ in range(50):
+   status = client.get_value('rag_status')
+   if status == 'ready':
+    success = True
+    break
+   time.sleep(0.5)
+  assert success, f"Incremental re-indexing timed out. Final status: {status}"
+  print("[SIM] Incremental re-indexing SUCCESS.")
   
   # 6. Verify retrieval of modified content
   client.set_value('current_provider', 'gemini_cli')