diff --git a/ppf.py b/ppf.py
index 92b86e2..f38a26f 100644
--- a/ppf.py
+++ b/ppf.py
@@ -801,6 +801,8 @@ def worker_main(config):
             timeout_start = time.time()
             timeout_seconds = max(config.watchd.timeout * 2 + 30, len(all_jobs) * 0.5)
             working_results = []
+            last_heartbeat = time.time()
+            last_report = time.time()
 
             while completed < len(all_jobs):
                 try:
@@ -834,6 +836,40 @@ def worker_main(config):
                     if time.time() - timeout_start > timeout_seconds:
                         _log('test timeout, %d/%d completed' % (completed, len(all_jobs)), 'warn')
                         break
+
+                    # Periodic heartbeat to prevent stale detection
+                    now = time.time()
+                    if now - last_heartbeat >= 60:
+                        try:
+                            worker_send_heartbeat(server_url, wstate['worker_key'],
+                                                  True, current_tor_ip, worker_profiling, num_threads)
+                        except NeedReregister:
+                            do_register()
+                        last_heartbeat = now
+
+                    # Periodic proxy report (flush working results every 5 minutes)
+                    if working_results and now - last_report >= 300:
+                        reported = False
+                        try:
+                            processed = worker_report_proxies(server_url, wstate['worker_key'],
+                                                              working_results)
+                            if processed > 0:
+                                _log('interim report: %d proxies (%d submitted)' % (
+                                    len(working_results), processed), 'info')
+                                reported = True
+                        except NeedReregister:
+                            do_register()
+                            try:
+                                processed = worker_report_proxies(server_url, wstate['worker_key'],
+                                                                  working_results)
+                                if processed > 0:
+                                    reported = True
+                            except NeedReregister:
+                                pass
+                        if reported:
+                            working_results = []
+                        last_report = now
+
                     continue
 
             # Populate proxy test cache from results