diff --git a/tempest/cmd/verify_tempest_config.py b/tempest/cmd/verify_tempest_config.py
index 50691ad..6c2fee8 100644
--- a/tempest/cmd/verify_tempest_config.py
+++ b/tempest/cmd/verify_tempest_config.py
@@ -279,6 +279,9 @@
     if not results.get(service):
         results[service] = {}
     extensions_opt = get_enabled_extensions(service)
+    if not extensions_opt:
+        LOG.info("'%s' has no api_extensions set.", service)
+        return results
     if extensions_opt[0] == 'all':
         results[service]['extensions'] = extensions
         return results
diff --git a/tempest/tests/cmd/test_verify_tempest_config.py b/tempest/tests/cmd/test_verify_tempest_config.py
index 32d6224..c260343 100644
--- a/tempest/tests/cmd/test_verify_tempest_config.py
+++ b/tempest/tests/cmd/test_verify_tempest_config.py
@@ -343,6 +343,24 @@
         self.assertEqual(sorted(['fake1', 'fake2', 'not_fake']),
                          sorted(results['neutron']['extensions']))
 
+    def test_verify_extensions_neutron_none(self):
+        def fake_list_extensions():
+            return {'extensions': []}
+        fake_os = mock.MagicMock()
+        fake_client = mock.MagicMock()
+        fake_client.list_extensions = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_enabled_extensions',
+            return_value=(['all'])))
+        results = verify_tempest_config.verify_extensions(fake_os,
+                                                          'neutron', {})
+        self.assertIn('neutron', results)
+        self.assertIn('extensions', results['neutron'])
+        self.assertEqual([], results['neutron']['extensions'])
+
     def test_verify_extensions_cinder(self):
         def fake_list_extensions():
             return {'extensions': [{'alias': 'fake1'},
@@ -391,6 +409,24 @@
         self.assertEqual(sorted(['fake1', 'fake2', 'not_fake']),
                          sorted(results['cinder']['extensions']))
 
+    def test_verify_extensions_cinder_none(self):
+        def fake_list_extensions():
+            return {'extensions': []}
+        fake_os = mock.MagicMock()
+        fake_client = mock.MagicMock()
+        fake_client.list_extensions = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_enabled_extensions',
+            return_value=(['all'])))
+        results = verify_tempest_config.verify_extensions(fake_os,
+                                                          'cinder', {})
+        self.assertIn('cinder', results)
+        self.assertIn('extensions', results['cinder'])
+        self.assertEqual([], results['cinder']['extensions'])
+
     def test_verify_extensions_nova(self):
         def fake_list_extensions():
             return ([{'alias': 'fake1'}, {'alias': 'fake2'},
@@ -437,6 +473,24 @@
         self.assertEqual(sorted(['fake1', 'fake2', 'not_fake']),
                          sorted(results['nova']['extensions']))
 
+    def test_verify_extensions_nova_none(self):
+        def fake_list_extensions():
+            return ({'extensions': []})
+        fake_os = mock.MagicMock()
+        fake_client = mock.MagicMock()
+        fake_client.list_extensions = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_enabled_extensions',
+            return_value=(['all'])))
+        results = verify_tempest_config.verify_extensions(fake_os,
+                                                          'nova', {})
+        self.assertIn('nova', results)
+        self.assertIn('extensions', results['nova'])
+        self.assertEqual([], results['nova']['extensions'])
+
     def test_verify_extensions_swift(self):
         def fake_list_extensions():
             return {'fake1': 'metadata',
@@ -485,6 +539,24 @@
         self.assertEqual(sorted(['not_fake', 'fake1', 'fake2']),
                          sorted(results['swift']['extensions']))
 
+    def test_verify_extensions_swift_none(self):
+        def fake_list_extensions():
+            return {'swift': 'metadata'}
+        fake_os = mock.MagicMock()
+        fake_client = mock.MagicMock()
+        fake_client.list_capabilities = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_enabled_extensions',
+            return_value=(['all'])))
+        results = verify_tempest_config.verify_extensions(fake_os,
+                                                          'swift', {})
+        self.assertIn('swift', results)
+        self.assertIn('extensions', results['swift'])
+        self.assertEqual([], results['swift']['extensions'])
+
     def test_get_extension_client(self):
         creds = credentials_factory.get_credentials(
             fill_in=False, username='fake_user', project_name='fake_project',