diff --git a/test.py b/test.py
index 8e7cca6..efc243e 100644
--- a/test.py
+++ b/test.py
@@ -604,7 +604,15 @@ class TestBoardFlip(unittest.TestCase):
 
         self.assertEqual(Board.flip(board), expected_board)
 
+    def test_inverse(self):
+        board = (4,
+                 -5, -1, 0, 4, 3, 0,
+                 0, -1, 0, -5, 0, 0,
+                 0, 3, 0, 0, 0, 0,
+                 0, 0, 0, -1, 0, 1,
+                 -2)
 
+        self.assertEqual(Board.flip(Board.flip(board)), board)
         
 if __name__ == '__main__':
     unittest.main()