diff --git a/src/tests/util.py b/src/tests/util.py
--- a/src/tests/util.py
+++ b/src/tests/util.py
@@ -11,10 +11,14 @@ def simpleLoadSgf(filename):
 	return [g(m) for m in re.finditer(r"\b[BW]\[([a-z]{2})\]",contents)]
 
 
-def listStates(moves):
+def listBoards(moves):
 	g=Go()
-	res=[BoardState(g.board)]
+	res=[tuple(list(x for x in row) for row in g.board)]
 	for m in moves:
 		g.doMove(g.toMove,*m)
-		res.append(BoardState(g.board))
+		res.append(tuple(list(x for x in row) for row in g.board))
 	return res
+
+
+def listStates(moves):
+	return [BoardState(b) for b in listBoards(moves)]