diff --git a/.coveragerc b/.coveragerc
index 361b3720cb..3159830c2c 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -5,3 +5,6 @@ omit = magnum/tests/*,magnum/openstack/*
 
 [report]
 ignore_errors = True
+exclude_lines =
+    @abc.abstract
+    pass
diff --git a/magnum/tests/unit/api/controllers/v1/test_types.py b/magnum/tests/unit/api/controllers/v1/test_types.py
index 1b05502c2b..1b53f5ceaf 100644
--- a/magnum/tests/unit/api/controllers/v1/test_types.py
+++ b/magnum/tests/unit/api/controllers/v1/test_types.py
@@ -37,6 +37,16 @@ class TestMacAddressType(base.FunctionalTest):
         self.assertRaises(exception.InvalidMAC,
                           types.MacAddressType.validate, 'invalid-mac')
 
+    def test_frombasetype(self):
+        test_mac = 'aa:bb:cc:11:22:33'
+        with mock.patch.object(utils, 'validate_and_normalize_mac') as m_mock:
+            types.MacAddressType.frombasetype(test_mac)
+            m_mock.assert_called_once_with(test_mac)
+
+    def test_frombasetype_no_value(self):
+        test_mac = None
+        self.assertEqual(None, types.MacAddressType.frombasetype(test_mac))
+
 
 class TestUuidType(base.FunctionalTest):
 
@@ -207,6 +217,10 @@ class TestBooleanType(base.FunctionalTest):
         self.assertRaises(exception.Invalid, v.validate, "invalid-value")
         self.assertRaises(exception.Invalid, v.validate, "01")
 
+    def test_frombasetype_no_value(self):
+        v = types.BooleanType()
+        self.assertEqual(None, v.frombasetype(None))
+
 
 class TestNameType(base.FunctionalTest):
 
@@ -217,3 +231,10 @@ class TestNameType(base.FunctionalTest):
     def test_invalid_name(self):
         self.assertRaises(exception.InvalidName, types.NameType.validate, None)
         self.assertRaises(exception.InvalidName, types.NameType.validate, '')
+
+    def test_frombasetype_no_value(self):
+        self.assertEqual('name', types.NameType.frombasetype('name'))
+        self.assertEqual(1234, types.NameType.frombasetype(1234))
+
+    def test_frombasetype(self):
+        self.assertEqual(None, types.NameType.frombasetype(None))
diff --git a/magnum/tests/unit/objects/test_magnum_service.py b/magnum/tests/unit/objects/test_magnum_service.py
index a7f5cfd409..d472fe823b 100644
--- a/magnum/tests/unit/objects/test_magnum_service.py
+++ b/magnum/tests/unit/objects/test_magnum_service.py
@@ -36,6 +36,16 @@ class TestMagnumServiceObject(base.DbTestCase):
                                                             'fake-bin')
             self.assertEqual(self.context, ms._context)
 
+    def test_get_by_host_and_binary_no_service(self):
+        with mock.patch.object(self.dbapi, 'create_magnum_service',
+                               autospec=True) as mock_get_magnum_service:
+            mock_get_magnum_service.return_value = None
+            ms = objects.MagnumService.get_by_host_and_binary(self.context,
+                                                              'fake-host',
+                                                              'fake-bin')
+
+            self.assertIsNone(ms)
+
     def test_create(self):
         with mock.patch.object(self.dbapi, 'create_magnum_service',
                                autospec=True) as mock_create_magnum_service: