diff --git a/neutron/tests/unit/extensions/test_default_subnetpools.py b/neutron/tests/unit/extensions/test_default_subnetpools.py
index e78587d2b00..ef9d506caf8 100644
--- a/neutron/tests/unit/extensions/test_default_subnetpools.py
+++ b/neutron/tests/unit/extensions/test_default_subnetpools.py
@@ -32,7 +32,8 @@ class DefaultSubnetpoolsExtensionManager(object):
         return []
 
     def get_extended_resources(self, version):
-        return default_subnetpools.get_extended_resources(version)
+        extension = default_subnetpools.Default_subnetpools()
+        return extension.get_extended_resources(version)
 
 
 class DefaultSubnetpoolsExtensionTestPlugin(
diff --git a/neutron/tests/unit/extensions/test_dns.py b/neutron/tests/unit/extensions/test_dns.py
index 53cddebdccc..6033d293658 100644
--- a/neutron/tests/unit/extensions/test_dns.py
+++ b/neutron/tests/unit/extensions/test_dns.py
@@ -40,7 +40,7 @@ class DnsExtensionManager(object):
         return []
 
     def get_extended_resources(self, version):
-        return dns.get_extended_resources(version)
+        return dns.Dns().get_extended_resources(version)
 
 
 class DnsExtensionTestPlugin(db_base_plugin_v2.NeutronDbPluginV2):
diff --git a/neutron/tests/unit/extensions/test_providernet.py b/neutron/tests/unit/extensions/test_providernet.py
index ab4eec1e246..6c38332c18d 100644
--- a/neutron/tests/unit/extensions/test_providernet.py
+++ b/neutron/tests/unit/extensions/test_providernet.py
@@ -45,7 +45,7 @@ class ProviderExtensionManager(object):
         return []
 
     def get_extended_resources(self, version):
-        return pnet.get_extended_resources(version)
+        return pnet.Providernet().get_extended_resources(version)
 
 
 class ProvidernetExtensionTestCase(testlib_api.WebTestCase):
diff --git a/neutron/tests/unit/extensions/test_subnet_service_types.py b/neutron/tests/unit/extensions/test_subnet_service_types.py
index a13fdaeade9..59e421ff33f 100644
--- a/neutron/tests/unit/extensions/test_subnet_service_types.py
+++ b/neutron/tests/unit/extensions/test_subnet_service_types.py
@@ -29,7 +29,8 @@ class SubnetServiceTypesExtensionManager(object):
         return []
 
     def get_extended_resources(self, version):
-        return subnet_service_types.get_extended_resources(version)
+        extension = subnet_service_types.Subnet_service_types()
+        return extension.get_extended_resources(version)
 
 
 class SubnetServiceTypesExtensionTestPlugin(
diff --git a/neutron/tests/unit/extensions/test_vlantransparent.py b/neutron/tests/unit/extensions/test_vlantransparent.py
index 361e1daa7bc..a9f8bb7baef 100644
--- a/neutron/tests/unit/extensions/test_vlantransparent.py
+++ b/neutron/tests/unit/extensions/test_vlantransparent.py
@@ -37,7 +37,7 @@ class VlanTransparentExtensionManager(object):
         return []
 
     def get_extended_resources(self, version):
-        return vlt.get_extended_resources(version)
+        return vlt.Vlantransparent().get_extended_resources(version)
 
 
 class VlanTransparentExtensionTestPlugin(db_base_plugin_v2.NeutronDbPluginV2,