diff --git a/openstackclient/common/quota.py b/openstackclient/common/quota.py
index 10f40a75d4..f2d097fc17 100644
--- a/openstackclient/common/quota.py
+++ b/openstackclient/common/quota.py
@@ -972,12 +972,12 @@ class DeleteQuota(command.Command):
         # compute quotas
         if parsed_args.service in {'all', 'compute'}:
             compute_client = self.app.client_manager.compute
-            compute_client.quotas.delete(project)
+            compute_client.quotas.delete(project.id)
 
         # volume quotas
         if parsed_args.service in {'all', 'volume'}:
             volume_client = self.app.client_manager.volume
-            volume_client.quotas.delete(project)
+            volume_client.quotas.delete(project.id)
 
         # network quotas (but only if we're not using nova-network, otherwise
         # we already deleted the quotas in the compute step)
@@ -986,6 +986,6 @@ class DeleteQuota(command.Command):
             and self.app.client_manager.is_network_endpoint_enabled()
         ):
             network_client = self.app.client_manager.network
-            network_client.quotas.delete(project)
+            network_client.delete_quota(project.id)
 
         return None
diff --git a/openstackclient/tests/unit/common/test_quota.py b/openstackclient/tests/unit/common/test_quota.py
index 682799b39e..f798137aeb 100644
--- a/openstackclient/tests/unit/common/test_quota.py
+++ b/openstackclient/tests/unit/common/test_quota.py
@@ -62,8 +62,8 @@ class TestQuota(compute_fakes.TestComputev2):
             self.app.client_manager.volume.quota_classes
         self.volume_quotas_class_mock.reset_mock()
 
-        self.app.client_manager.network.quotas = mock.Mock()
-        self.network_quotas_mock = self.app.client_manager.network.quotas
+        self.app.client_manager.network = mock.Mock()
+        self.network_mock = self.app.client_manager.network
 
         self.app.client_manager.auth_ref = mock.Mock()
         self.app.client_manager.auth_ref.service_catalog = mock.Mock()
@@ -660,7 +660,6 @@ class TestQuotaSet(TestQuota):
             loaded=True,
         )
 
-        self.network_mock = self.app.client_manager.network
         self.network_mock.update_quota = mock.Mock()
 
         self.cmd = quota.SetQuota(self.app, None)
@@ -1272,6 +1271,8 @@ class TestQuotaDelete(TestQuota):
     def setUp(self):
         super().setUp()
 
+        self.network_mock.delete_quota = mock.Mock()
+
         self.cmd = quota.DeleteQuota(self.app, None)
 
     def test_delete(self):
@@ -1291,13 +1292,13 @@ class TestQuotaDelete(TestQuota):
         self.assertIsNone(result)
         self.projects_mock.get.assert_called_once_with(self.projects[0].id)
         self.compute_quotas_mock.delete.assert_called_once_with(
-            self.projects[0],
+            self.projects[0].id,
         )
         self.volume_quotas_mock.delete.assert_called_once_with(
-            self.projects[0],
+            self.projects[0].id,
         )
-        self.network_quotas_mock.delete.assert_called_once_with(
-            self.projects[0],
+        self.network_mock.delete_quota.assert_called_once_with(
+            self.projects[0].id,
         )
 
     def test_delete__compute(self):
@@ -1318,10 +1319,10 @@ class TestQuotaDelete(TestQuota):
         self.assertIsNone(result)
         self.projects_mock.get.assert_called_once_with(self.projects[0].id)
         self.compute_quotas_mock.delete.assert_called_once_with(
-            self.projects[0],
+            self.projects[0].id,
         )
         self.volume_quotas_mock.delete.assert_not_called()
-        self.network_quotas_mock.delete.assert_not_called()
+        self.network_mock.delete_quota.assert_not_called()
 
     def test_delete__volume(self):
         """Delete volume quotas only"""
@@ -1342,9 +1343,9 @@ class TestQuotaDelete(TestQuota):
         self.projects_mock.get.assert_called_once_with(self.projects[0].id)
         self.compute_quotas_mock.delete.assert_not_called()
         self.volume_quotas_mock.delete.assert_called_once_with(
-            self.projects[0],
+            self.projects[0].id,
         )
-        self.network_quotas_mock.delete.assert_not_called()
+        self.network_mock.delete_quota.assert_not_called()
 
     def test_delete__network(self):
         """Delete network quotas only"""
@@ -1365,6 +1366,6 @@ class TestQuotaDelete(TestQuota):
         self.projects_mock.get.assert_called_once_with(self.projects[0].id)
         self.compute_quotas_mock.delete.assert_not_called()
         self.volume_quotas_mock.delete.assert_not_called()
-        self.network_quotas_mock.delete.assert_called_once_with(
-            self.projects[0],
+        self.network_mock.delete_quota.assert_called_once_with(
+            self.projects[0].id,
         )