diff --git a/.gitignore b/.gitignore
index 60cb1f8..3269e7f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,5 @@ venv/
 
 .coverage
 .pytest_cache/
+
+__pycache__
diff --git a/dungeonbattle/interfaces_test.py b/dungeonbattle/interfaces_test.py
index a987b37..479a9ac 100644
--- a/dungeonbattle/interfaces_test.py
+++ b/dungeonbattle/interfaces_test.py
@@ -8,3 +8,4 @@ class TestInterfaces(unittest.TestCase):
         m = Map.load_from_string("ab\ncd\n")
         self.assertEqual(m.width, 2)
         self.assertEqual(m.height, 2)
+        self.assertEqual(m.draw_string(), "ab\ncd")