diff --git a/neutron/tests/fullstack/test_l3_agent.py b/neutron/tests/fullstack/test_l3_agent.py
index c11a6e6145c..9aae22d8c3a 100644
--- a/neutron/tests/fullstack/test_l3_agent.py
+++ b/neutron/tests/fullstack/test_l3_agent.py
@@ -561,5 +561,6 @@ class TestHAL3Agent(TestL3Agent):
     def test_external_subnet_changed(self):
         self._test_external_subnet_changed()
 
+    @tests_base.unstable_test("bug 1946186")
     def test_router_fip_qos_after_admin_state_down_up(self):
         self._router_fip_qos_after_admin_state_down_up(ha=True)