diff --git a/gns3server/compute/docker/docker_vm.py b/gns3server/compute/docker/docker_vm.py
index dafe3e8ee..e6f2aee1a 100644
--- a/gns3server/compute/docker/docker_vm.py
+++ b/gns3server/compute/docker/docker_vm.py
@@ -1049,11 +1049,14 @@ class DockerVM(BaseNode):
 
             state = await self._get_container_state()
             if state != "stopped" and state != "exited":
-                # t=5 number of seconds to wait before killing the container
+                # SIGKILL immediately. GNS3 has already persisted container state
+                # (permissions via _fix_permissions, /gns3volumes) before this
+                # point, and the business process (often an interactive shell)
+                # ignores SIGTERM — so a stop grace period buys nothing but latency.
                 try:
-                    await self.manager.query("POST", f"containers/{self._cid}/stop", params={"t": 5})
+                    await self.manager.query("POST", f"containers/{self._cid}/kill")
                     log.info(f"Docker container '{self._name}' [{self._image}] stopped")
-                except DockerHttp304Error:
+                except DockerHttp409Error:
                     # Container is already stopped
                     pass
         # Ignore runtime error because when closing the server
diff --git a/tests/compute/docker/test_docker_vm.py b/tests/compute/docker/test_docker_vm.py
index bc722423e..9d8bee2b8 100644
--- a/tests/compute/docker/test_docker_vm.py
+++ b/tests/compute/docker/test_docker_vm.py
@@ -1209,7 +1209,7 @@ async def test_stop(vm):
         with asyncio_patch("gns3server.compute.docker.Docker.query") as mock_query:
             vm._permissions_fixed = False
             await vm.stop()
-            mock_query.assert_called_with("POST", "containers/e90e34656842/stop", params={"t": 5})
+            mock_query.assert_called_with("POST", "containers/e90e34656842/kill")
     assert mock.stop.called
     assert vm._ubridge_hypervisor is None
     assert vm._fix_permissions.called
@@ -1222,7 +1222,7 @@ async def test_stop_paused_container(vm):
         with asyncio_patch("gns3server.compute.docker.DockerVM.unpause") as mock_unpause:
             with asyncio_patch("gns3server.compute.docker.Docker.query") as mock_query:
                 await vm.stop()
-                mock_query.assert_called_with("POST", "containers/e90e34656842/stop", params={"t": 5})
+                mock_query.assert_called_with("POST", "containers/e90e34656842/kill")
                 assert mock_unpause.called
 
 
@@ -1894,7 +1894,7 @@ async def test_stop_exited_container_no_stop_query(vm):
             vm._permissions_fixed = False
             await vm.stop()
             assert not any(
-                call.args[:2] == ("POST", "containers/e90e34656842/stop")
+                call.args[:2] == ("POST", "containers/e90e34656842/kill")
                 for call in mock_query.mock_calls
             )
     assert vm.status == "stopped"