diff --git a/dungeonbattle/interfaces.py b/dungeonbattle/interfaces.py
index 537b256..b7229a8 100644
--- a/dungeonbattle/interfaces.py
+++ b/dungeonbattle/interfaces.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-from enum import Enum, auto
+from enum import Enum
 
 
 class Map:
@@ -29,17 +29,21 @@ class Map:
         return Map(width, height, tiles)
 
     def draw_string(self) -> str:
-        return "\n".join("".join(tile.char for tile in line) for line in self.tiles)
+        return "\n".join("".join(tile.value for tile in line)
+                         for line in self.tiles)
 
 
 class Tile(Enum):
-    EMPTY = auto()
-    WALL = auto()
-    FLOOR = auto()
+    EMPTY = ' '
+    WALL = '#'
+    FLOOR = '.'
 
     @staticmethod
     def from_char(c: str):
-        return {'#': Tile.WALL, '.': Tile.FLOOR, ' ': Tile.EMPTY}[c]
+        for t in Tile:
+            if t.value == c:
+                return t
+        raise ValueError(f"Tile not found : {c}")
 
 
 class Entity:
diff --git a/dungeonbattle/interfaces_test.py b/dungeonbattle/interfaces_test.py
index 479a9ac..dc8932a 100644
--- a/dungeonbattle/interfaces_test.py
+++ b/dungeonbattle/interfaces_test.py
@@ -5,7 +5,7 @@ from dungeonbattle.interfaces import Map
 
 class TestInterfaces(unittest.TestCase):
     def test_map(self) -> None:
-        m = Map.load_from_string("ab\ncd\n")
+        m = Map.load_from_string(".#\n#.\n")
         self.assertEqual(m.width, 2)
         self.assertEqual(m.height, 2)
-        self.assertEqual(m.draw_string(), "ab\ncd")
+        self.assertEqual(m.draw_string(), ".#\n#.")