diff --git a/binding/python_c_ffi.py b/binding/python_c_ffi.py
index dcc1dc8..e34c635 100644
--- a/binding/python_c_ffi.py
+++ b/binding/python_c_ffi.py
@@ -100,6 +100,13 @@ def get_rank_mask(rank):
     return sum(1 << (rank*8 + f) for f in range(8))
 
 
+def bb_from(*algebraic):
+    m = 0
+    for s in algebraic:
+        m |= (1 << sq(s))
+    return m
+
+
 class ChessFFI:
     def __init__(self):
         self.lib_path = "./build/libchess.so"
diff --git a/test/test_piece_attack_cache.py b/test/test_piece_attack_cache.py
index 25ad432..be7e085 100644
--- a/test/test_piece_attack_cache.py
+++ b/test/test_piece_attack_cache.py
@@ -1,75 +1,75 @@
 from test.base import ChessLibTestBase
-from test.chess_ffi import bb_from
-from test.chess_ffi import draw_bb
-from test.chess_ffi import sq
-from test.chess_ffi import BLACK, WHITE
+from binding.python_c_ffi import bb_from
+from binding.python_c_ffi import sq
+from binding.python_c_ffi import BLACK
+from binding.python_c_ffi import WHITE
 
 
 class KnightFixedCases(ChessLibTestBase):
     def test_knight_a1(self):
         expected = bb_from("b3", "c2")
-        self.assertEqual(int(self.KNIGHT_ATTACKS[sq("a1")]), expected)
+        self.assertEqual(int(self.chess_ffi.KNIGHT_ATTACKS[sq("a1")]), expected)
 
 
     def test_knight_d4(self):
         expected = bb_from("b5","b3","c6","e6","f5","f3","c2","e2")
-        actual = int(self.KNIGHT_ATTACKS[sq("d4")])
+        actual = int(self.chess_ffi.KNIGHT_ATTACKS[sq("d4")])
         self.assertEqual(actual, expected)
 
 
     def test_knight_h8(self):
         expected = bb_from("f7","g6")
-        actual = int(self.KNIGHT_ATTACKS[sq("h8")])
+        actual = int(self.chess_ffi.KNIGHT_ATTACKS[sq("h8")])
         self.assertEqual(actual, expected)
 
 
 class PawnFixedCases(ChessLibTestBase):
     def test_white_pawn_a2(self):
         expected = bb_from("b3")
-        actual = int(self.PAWN_ATTACKS[WHITE][sq("a2")])
+        actual = int(self.chess_ffi.PAWN_ATTACKS[WHITE][sq("a2")])
         self.assertEqual(actual, expected)
 
 
     def test_white_pawn_b2(self):
         expected = bb_from("a3", "c3")
-        actual = int(self.PAWN_ATTACKS[WHITE][sq("b2")])
+        actual = int(self.chess_ffi.PAWN_ATTACKS[WHITE][sq("b2")])
         self.assertEqual(actual, expected)
 
 
     def test_black_pawn_a2(self):
         expected = bb_from("b6")
-        actual = int(self.PAWN_ATTACKS[BLACK][sq("a7")])
+        actual = int(self.chess_ffi.PAWN_ATTACKS[BLACK][sq("a7")])
         self.assertEqual(actual, expected)
 
 
     def test_black_pawn_b2(self):
         expected = bb_from("a6", "c6")
-        actual = int(self.PAWN_ATTACKS[BLACK][sq("b7")])
+        actual = int(self.chess_ffi.PAWN_ATTACKS[BLACK][sq("b7")])
         self.assertEqual(actual, expected)
 
 
 class KingFixedCases(ChessLibTestBase):
     def test_king_a1(self):
         expected = bb_from("a2", "b1", "b2")
-        actual = int(self.KING_ATTACKS[sq("a1")])
+        actual = int(self.chess_ffi.KING_ATTACKS[sq("a1")])
         self.assertEqual(actual, expected)
 
 
     def test_king_a8(self):
         expected = bb_from("a7", "b8", "b7")
-        actual = int(self.KING_ATTACKS[sq("a8")])
+        actual = int(self.chess_ffi.KING_ATTACKS[sq("a8")])
         self.assertEqual(actual, expected)
 
 
     def test_king_h1(self):
         expected = bb_from("h2", "g1", "g2")
-        actual = int(self.KING_ATTACKS[sq("h1")])
+        actual = int(self.chess_ffi.KING_ATTACKS[sq("h1")])
         self.assertEqual(actual, expected)
 
 
     def test_king_h8(self):
         expected = bb_from("h7", "g7", "g8")
-        actual = int(self.KING_ATTACKS[sq("h8")])
+        actual = int(self.chess_ffi.KING_ATTACKS[sq("h8")])
         self.assertEqual(actual, expected)
 
 
@@ -79,5 +79,5 @@ class KingFixedCases(ChessLibTestBase):
             "c4", "e4",
             "c5", "d5", "e5",
         )
-        actual = int(self.KING_ATTACKS[sq("d4")])
+        actual = int(self.chess_ffi.KING_ATTACKS[sq("d4")])
         self.assertEqual(actual, expected)
\ No newline at end of file