diff --git a/tests/test_blacklist.py b/tests/test_blacklist.py
index 54a5d880..61e90d5e 100644
--- a/tests/test_blacklist.py
+++ b/tests/test_blacklist.py
@@ -4,7 +4,12 @@ from slpkg.blacklist import Blacklist
 
 class TestBlacklist(unittest.TestCase):
 
-    def test_blacklist(self):
+    """ Test for blacklist files.
+    """
+
+    def test_blacklist(self) -> None:
+        """ Test blacklist packages.
+        """
         black = Blacklist()
         self.assertTupleEqual((), black.packages())