diff --git a/searx/search/checker/background.py b/searx/search/checker/background.py
index be30897b..e41bff5f 100644
--- a/searx/search/checker/background.py
+++ b/searx/search/checker/background.py
@@ -40,8 +40,9 @@ def get_result():
         return json.loads(serialized_result)
 
 
-def _set_result(result):
-    result['timestamp'] = int(time.time() / 3600) * 3600
+def _set_result(result, include_timestamp=True):
+    if include_timestamp:
+        result['timestamp'] = int(time.time() / 3600) * 3600
     storage.set_str(CHECKER_RESULT, json.dumps(result))
 
 
@@ -82,8 +83,8 @@ def _run_with_delay():
 
 def _start_scheduling():
     every = _get_every()
-    schedule(every[0], _run_with_delay)
-    run()
+    if schedule(every[0], _run_with_delay):
+        run()
 
 
 def _signal_handler(signum, frame):
@@ -111,7 +112,7 @@ def initialize():
         return
 
     #
-    _set_result({'status': 'unknown'})
+    _set_result({'status': 'unknown'}, include_timestamp=False)
 
     start_after = scheduling.get('start_after', (300, 1800))
     start_after = _get_interval(start_after, 'checker.scheduling.start_after is not a int or list')
diff --git a/searx/shared/__init__.py b/searx/shared/__init__.py
index 83d3a274..cbe24d23 100644
--- a/searx/shared/__init__.py
+++ b/searx/shared/__init__.py
@@ -22,7 +22,7 @@ else:
         from .shared_simple import SimpleSharedDict as SharedDict
 
         def schedule(delay, func, *args):
-            pass
+            return False
     else:
         # uwsgi
         from .shared_uwsgi import UwsgiCacheSharedDict as SharedDict, schedule
diff --git a/searx/shared/shared_simple.py b/searx/shared/shared_simple.py
index 5b970aad..48d8cb82 100644
--- a/searx/shared/shared_simple.py
+++ b/searx/shared/shared_simple.py
@@ -36,3 +36,4 @@ def schedule(delay, func, *args):
         func(*args)
 
     call_later()
+    return True
diff --git a/searx/shared/shared_uwsgi.py b/searx/shared/shared_uwsgi.py
index b42b5fa7..a6dba9f5 100644
--- a/searx/shared/shared_uwsgi.py
+++ b/searx/shared/shared_uwsgi.py
@@ -61,3 +61,4 @@ def schedule(delay, func, *args):
     _last_signal += 1
     uwsgi.register_signal(signal_num, 'worker', sighandler)
     uwsgi.add_timer(signal_num, delay)
+    return True