diff --git a/vmware_nsxlib/v3/client_cert.py b/vmware_nsxlib/v3/client_cert.py
index 20c2b6d4..cb2882e4 100644
--- a/vmware_nsxlib/v3/client_cert.py
+++ b/vmware_nsxlib/v3/client_cert.py
@@ -139,7 +139,7 @@ class ClientCertificateManager(object):
                 self._nsx_trust_management.delete_cert(
                     details['certificate_id'])
 
-        except exceptions.ManagerError as e:
+        except nsxlib_exceptions.ManagerError as e:
             LOG.error(_LE("Failed to clear certificate on backend: %s"), e)
             ok = False
 
diff --git a/vmware_nsxlib/v3/trust_management.py b/vmware_nsxlib/v3/trust_management.py
index 9699a330..55228106 100644
--- a/vmware_nsxlib/v3/trust_management.py
+++ b/vmware_nsxlib/v3/trust_management.py
@@ -62,5 +62,5 @@ class NsxLibTrustManagement(utils.NsxLibApiBase):
                 return result
 
         raise nsxlib_exc.ResourceNotFound(
-            manager=self._client.nsx_api_managers,
+            manager=self.client.nsx_api_managers,
             operation="Principal identity %s not found" % identity)