diff --git a/nova/tests/unit/virt/ironic/test_driver.py b/nova/tests/unit/virt/ironic/test_driver.py
index e8f266daf3..e880a41cb6 100644
--- a/nova/tests/unit/virt/ironic/test_driver.py
+++ b/nova/tests/unit/virt/ironic/test_driver.py
@@ -2659,7 +2659,9 @@ class HashRingTestCase(test.NoDBTestCase):
 
     @mock.patch.object(ironic_driver.IronicDriver, '_refresh_hash_ring')
     def test_hash_ring_refreshed_on_init(self, mock_hr):
-        ironic_driver.IronicDriver(None)
+        d = ironic_driver.IronicDriver(None)
+        self.assertFalse(mock_hr.called)
+        d.init_host('foo')
         mock_hr.assert_called_once_with(mock.ANY)
 
     @mock.patch.object(hash_ring, 'HashRing')
@@ -2718,6 +2720,7 @@ class NodeCacheTestCase(test.NoDBTestCase):
         super(NodeCacheTestCase, self).setUp()
 
         self.driver = ironic_driver.IronicDriver(None)
+        self.driver.init_host('foo')
         self.driver.virtapi = fake.FakeVirtAPI()
         self.ctx = nova_context.get_admin_context()
 
diff --git a/nova/virt/ironic/driver.py b/nova/virt/ironic/driver.py
index b4f70d02a1..7e69ceb018 100644
--- a/nova/virt/ironic/driver.py
+++ b/nova/virt/ironic/driver.py
@@ -152,7 +152,6 @@ class IronicDriver(virt_driver.ComputeDriver):
         self.node_cache = {}
         self.node_cache_time = 0
         self.servicegroup_api = servicegroup.API()
-        self._refresh_hash_ring(nova_context.get_admin_context())
 
         self.ironicclient = client_wrapper.IronicClientWrapper()
 
@@ -512,7 +511,7 @@ class IronicDriver(virt_driver.ComputeDriver):
         :param host: the hostname of the compute host.
 
         """
-        return
+        self._refresh_hash_ring(nova_context.get_admin_context())
 
     def _pike_flavor_migration(self, node_uuids):
         """This code is needed in Pike to prevent problems where an operator