diff --git a/gns3server/configs/iou_l2_base_startup-config.txt b/gns3server/configs/iou_l2_base_startup-config.txt
index 501355f6..4a09db82 100644
--- a/gns3server/configs/iou_l2_base_startup-config.txt
+++ b/gns3server/configs/iou_l2_base_startup-config.txt
@@ -13,7 +13,8 @@ logging console discriminator EXCESS
 !
 no ip icmp rate-limit unreachable
 !
-ip cef
+! due to some bugs with IOU, try to change the following line to 'ip cef' if your routing does not work
+no ip cef
 no ip domain-lookup
 !
 !
diff --git a/gns3server/configs/iou_l3_base_startup-config.txt b/gns3server/configs/iou_l3_base_startup-config.txt
index 81d574ff..67628f77 100644
--- a/gns3server/configs/iou_l3_base_startup-config.txt
+++ b/gns3server/configs/iou_l3_base_startup-config.txt
@@ -12,7 +12,8 @@ no ip icmp rate-limit unreachable
 !         
 !
 !
-ip cef
+! due to some bugs with IOU, try to change the following line to 'ip cef' if your routing does not work
+no ip cef
 no ip domain-lookup
 !
 !
diff --git a/requirements.txt b/requirements.txt
index 4ea254ac..284863a2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,8 @@ uvicorn==0.23.2
 fastapi==0.104.0
 python-multipart==0.0.6
 websockets==12.0
-aiohttp==3.8.6,<3.9
+aiohttp>=3.8.6,<3.9; python_version < '3.12'
+aiohttp==3.9.0b0; python_version == '3.12'
 async-timeout==4.0.3
 aiofiles==23.2.1
 Jinja2>=3.1.2,<3.2
diff --git a/tests/compute/qemu/test_qemu_vm.py b/tests/compute/qemu/test_qemu_vm.py
index b719b186..4409fcc2 100644
--- a/tests/compute/qemu/test_qemu_vm.py
+++ b/tests/compute/qemu/test_qemu_vm.py
@@ -214,19 +214,19 @@ async def test_termination_callback_error(vm, tmpdir):
 @pytest.mark.asyncio
 async def test_reload(vm):
 
-    with asyncio_patch("gns3server.compute.qemu.QemuVM._control_vm") as mock:
+    with asyncio_patch("gns3server.compute.qemu.QemuVM._control_vm") as m:
         await vm.reload()
-        assert mock.called_with("system_reset")
+        m.assert_called_with("system_reset")
 
 
 @pytest.mark.asyncio
-async def test_suspend(vm):
+async def test_suspend(vm, running_subprocess_mock):
 
-    control_vm_result = MagicMock()
-    control_vm_result.match.group.decode.return_value = "running"
-    with asyncio_patch("gns3server.compute.qemu.QemuVM._control_vm", return_value=control_vm_result) as mock:
-        await vm.suspend()
-        assert mock.called_with("system_reset")
+    vm._process = running_subprocess_mock
+    with asyncio_patch("gns3server.compute.qemu.QemuVM._get_vm_status", return_value="running"):
+        with asyncio_patch("gns3server.compute.qemu.QemuVM._control_vm") as m:
+            await vm.suspend()
+            m.assert_called_with("stop")
 
 
 @pytest.mark.asyncio
@@ -500,14 +500,15 @@ def test_json(vm, compute_project):
 
 
 @pytest.mark.asyncio
-async def test_control_vm(vm):
+async def test_control_vm(vm, running_subprocess_mock):
 
-    vm._process = MagicMock()
+    vm._process = running_subprocess_mock
+    vm._monitor = 4242
     reader = MagicMock()
     writer = MagicMock()
     with asyncio_patch("asyncio.open_connection", return_value=(reader, writer)):
         res = await vm._control_vm("test")
-        assert writer.write.called_with("test")
+        writer.write.assert_called_with(b"test\n")
     assert res is None
 
 
@@ -525,7 +526,7 @@ async def test_control_vm_expect_text(vm, running_subprocess_mock):
 
         vm._monitor = 4242
         res = await vm._control_vm("test", [b"epic"])
-        assert writer.write.called_with("test")
+        writer.write.assert_called_with(b"test\n")
 
     assert res == "epic product"