diff --git a/Tests/test_file_dds.py b/Tests/test_file_dds.py
index 200bebaba..6914c5f6e 100644
--- a/Tests/test_file_dds.py
+++ b/Tests/test_file_dds.py
@@ -7,9 +7,11 @@ TEST_FILE_DXT3 = "Tests/images/dxt3-argb-8bbp-explicitalpha_MipMaps-1.dds"
 TEST_FILE_DXT5 = "Tests/images/dxt5-argb-8bbp-interpolatedalpha_MipMaps-1.dds"
 
 
-class TestFileCur(PillowTestCase):
+class TestFileDds(PillowTestCase):
+    """Test DdsImagePlugin"""
 
     def test_sanity_dxt1(self):
+        """Check DXT1 images can be opened"""
         im = Image.open(TEST_FILE_DXT1)
 
         self.assertEqual(im.format, "DDS")
@@ -18,6 +20,7 @@ class TestFileCur(PillowTestCase):
         self.assertIsInstance(im, DdsImagePlugin.DdsImageFile)
 
     def test_sanity_dxt5(self):
+        """Check DXT5 images can be opened"""
         im = Image.open(TEST_FILE_DXT5)
 
         self.assertEqual(im.format, "DDS")
@@ -26,10 +29,12 @@ class TestFileCur(PillowTestCase):
         self.assertIsInstance(im, DdsImagePlugin.DdsImageFile)
 
     def test_sanity_dxt3(self):
+        """Check DXT3 images are not supported"""
         self.assertRaises(NotImplementedError,
                           lambda: Image.open(TEST_FILE_DXT3))
 
     def test__validate_true(self):
+        """Check valid prefix"""
         # Arrange
         prefix = b"DDS etc"
 
@@ -40,6 +45,7 @@ class TestFileCur(PillowTestCase):
         self.assertTrue(output)
 
     def test__validate_false(self):
+        """Check invalid prefix"""
         # Arrange
         prefix = b"something invalid"