diff --git a/test/test_utils.py b/test/test_utils.py
index dc064a7..e5eff7f 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -208,11 +208,18 @@ class TestInterval(unittest.TestCase):
 
     def test_move_end(self):
         """Test the move_end method - changes end time to time specified, keeps start time constant"""
-        interval = utils.Interval(start=self.start, end=self.end)
-        interval.move_end(15)
-        self.assertEqual(interval.start, 0)
-        self.assertEqual(interval.end, 15)
-        self.assertEqual(interval.duration, 15)
+        with self.subTest("non-relative"):
+            interval = utils.Interval(start=self.start, end=self.end)
+            interval.move_end(15)
+            self.assertEqual(interval.start, 0)
+            self.assertEqual(interval.end, 15)
+            self.assertEqual(interval.duration, 15)
+        with self.subTest("relative"):
+            interval = utils.Interval(start=self.start, end=self.end)
+            interval.move_end(5, relative=True)
+            self.assertEqual(interval.start, 0)
+            self.assertEqual(interval.end, 15)
+            self.assertEqual(interval.duration, 15)
 
     def test_update_duration(self):
         """Test the update_duration method - changes duration to time specified, keeps start time constant"""
@@ -354,6 +361,14 @@ class TestFeature(unittest.TestCase):
         self.assertEqual(feature1, feature2)
         self.assertNotEqual(feature1, feature3)
 
+    def test_feature_no_score(self):
+        """Test creating a Feature without a score"""
+        source = MockSource("source")
+        interval = MockInterval(0, 10)
+        feature_extractor = "test"
+        feature = utils.Feature(interval, source, feature_extractor)
+        self.assertEqual(feature.score, 0.0)
+
     # unhappy path tests
 
     def test_init_unhappy(self):