diff --git a/test.py b/test.py
index 93cc16d2c..bd5c4f295 100644
--- a/test.py
+++ b/test.py
@@ -975,15 +975,30 @@ def test_is_capture(self):
         self.assertFalse(result)
 
     def test_piece_to_partner(self):
+        # take the rook and promote to queen
         result = sf.piece_to_partner("bughouse", "r2qkbnr/1Ppppppp/2n5/8/8/8/1PPPPPPP/RNBQKBNR[] w KQkq - 0 1", ["b7a8q"])
         self.assertEqual(result, "r")
 
+        # take back the queen (promoted pawn)
         result = sf.piece_to_partner("bughouse", "r2qkbnr/1Ppppppp/2n5/8/8/8/1PPPPPPP/RNBQKBNR[] w KQkq - 0 1", ["b7a8q", "d8a8"])
         self.assertEqual(result, "P")
 
+        # just a simple move (no take)
         result = sf.piece_to_partner("bughouse", "r2qkbnr/1Ppppppp/2n5/8/8/8/1PPPPPPP/RNBQKBNR[] w KQkq - 0 1", ["b7a8q", "d8b8"])
         self.assertEqual(result, "")
 
+        # take the pawn and promote to tokin
+        result = sf.piece_to_partner("shogi", "lnsgkgsnl/1r5b1/ppppppp1p/1P7/9/7p1/P1PPPPPPP/1B5R1/LNSGKGSNL[] w 0 1", ["b6b7+"])
+        self.assertEqual(result, "p")
+
+        # take back the promoted pawn
+        result = sf.piece_to_partner("shogi", "lnsgkgsnl/1r5b1/ppppppp1p/1P7/9/7p1/P1PPPPPPP/1B5R1/LNSGKGSNL[] w 0 1", ["b6b7+", "b8b7"])
+        self.assertEqual(result, "P")
+
+        # take an unpromoted pawn
+        result = sf.piece_to_partner("shogi", "lnsgkgsnl/1r5b1/ppppppp1p/1P7/9/7p1/P1PPPPPPP/1B5R1/LNSGKGSNL[] w 0 1", ["b6b7+", "h4h3+"])
+        self.assertEqual(result, "P")
+
     def test_game_result(self):
         result = sf.game_result("chess", CHESS, ["f2f3", "e7e5", "g2g4", "d8h4"])
         self.assertEqual(result, -sf.VALUE_MATE)