diff --git a/gns3server/compute/notification_manager.py b/gns3server/compute/notification_manager.py
index 82388b0a..44c9ca39 100644
--- a/gns3server/compute/notification_manager.py
+++ b/gns3server/compute/notification_manager.py
@@ -15,7 +15,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-
+import asyncio
 from contextlib import contextmanager
 from gns3server.utils.notification_queue import NotificationQueue
 
@@ -54,7 +54,7 @@ class NotificationManager:
         """
 
         for listener in self._listeners:
-            listener.put_nowait((action, event, kwargs))
+            asyncio.get_event_loop().call_soon_threadsafe(listener.put_nowait, (action, event, kwargs))
 
     @staticmethod
     def reset():
diff --git a/gns3server/controller/notification.py b/gns3server/controller/notification.py
index 48d5a3d2..19672fb0 100644
--- a/gns3server/controller/notification.py
+++ b/gns3server/controller/notification.py
@@ -15,7 +15,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import os
+import asyncio
 from contextlib import contextmanager
 
 from gns3server.utils.notification_queue import NotificationQueue
@@ -73,7 +73,7 @@ class Notification:
         """
 
         for controller_listener in self._controller_listeners:
-            controller_listener.put_nowait((action, event, {}))
+            asyncio.get_event_loop().call_soon_threadsafe(controller_listener.put_nowait, (action, event, {}))
 
     def project_has_listeners(self, project_id):
         """
@@ -134,7 +134,7 @@ class Notification:
         except KeyError:
             return
         for listener in project_listeners:
-            listener.put_nowait((action, event, {}))
+            asyncio.get_event_loop().call_soon_threadsafe(listener.put_nowait, (action, event, {}))
 
     def _send_event_to_all_projects(self, action, event):
         """
@@ -146,4 +146,4 @@ class Notification:
         """
         for project_listeners in self._project_listeners.values():
             for listener in project_listeners:
-                listener.put_nowait((action, event, {}))
+                asyncio.get_event_loop().call_soon_threadsafe(listener.put_nowait, (action, event, {}))
diff --git a/tests/compute/qemu/test_qemu_vm.py b/tests/compute/qemu/test_qemu_vm.py
index c07e9051..d714d442 100644
--- a/tests/compute/qemu/test_qemu_vm.py
+++ b/tests/compute/qemu/test_qemu_vm.py
@@ -202,11 +202,11 @@ async def test_termination_callback_error(vm, tmpdir):
 
         await queue.get(1)  # Ping
 
-        (action, event, kwargs) = queue.get_nowait()
+        (action, event, kwargs) = await queue.get(1)
         assert action == "node.updated"
         assert event == vm
 
-        (action, event, kwargs) = queue.get_nowait()
+        (action, event, kwargs) = await queue.get(1)
         assert action == "log.error"
         assert event["message"] == "QEMU process has stopped, return code: 1\nBOOMM"